CN111305812B

CN111305812B - Method, device and storage medium for abnormal detection of coalbed gas wells

Info

Publication number: CN111305812B
Application number: CN201811427786.XA
Authority: CN
Inventors: 于家盛; 胡秋嘉; 祁空军; 张聪; 贾慧敏; 崔新瑞; 毛崇昊; 刘昌平; 张光波; 李志斌
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2023-05-26
Anticipated expiration: 2038-11-27
Also published as: CN111305812A

Abstract

The invention discloses a method, a device and a storage medium for abnormal detection of a coal bed gas well, belonging to the field of coal bed gas development. In the present invention, multiple parameter value lists of the target coalbed methane well are obtained, and the multiple parameter value lists are in one-to-one correspondence with multiple production parameters, and then the parameters of each production parameter in the multiple production parameters are determined according to the multiple parameter value lists Variation signatures to determine anomaly types for target coalbed methane wells based on multiple parameter variation signatures. That is to say, in the present invention, the abnormal type of the coalbed methane well is determined through multiple parameter change characteristics, rather than directly judging whether the coalbed methane well is abnormal according to whether the parameter value corresponding to a certain production parameter of the coalbed methane well is within the preset range Therefore, the detection method provided by the embodiment of the present invention can accurately determine the abnormal situation of the coalbed methane well, and improve the accuracy of abnormal detection of the coalbed methane well.

Description

Method, device and storage medium for detecting abnormality of coal-bed gas well

Technical Field

The invention relates to the field of coalbed methane exploitation, in particular to a method, a device and a storage medium for detecting abnormality of a coalbed methane well.

Background

Coalbed methane has become increasingly important as an unconventional natural gas. If a problem occurs in the coal-bed gas exploitation process, the exploitation efficiency of the coal-bed gas well is affected, so that abnormal conditions of the coal-bed gas well need to be detected.

In the related technology, in the production process of the coal-bed gas well, if the parameter value corresponding to a certain production parameter of the coal-bed gas well is not in a preset range, judging that the abnormal condition of the coal-bed gas well occurs. The production parameters of the coal-bed gas well comprise daily gas production, daily water production, casing pressure and the like. For example, the current daily gas yield of the coal-bed gas well is 400 square, and if the preset range is more than 500 square, the abnormal condition of the coal-bed gas well can be determined.

When the abnormality of the coal-bed gas well is detected according to the method, only the coal-bed gas well with obvious abnormality condition can be detected, and the coal-bed gas well with less obvious abnormality condition can not be detected at all, so that the accuracy of the abnormality detection of the coal-bed gas well by the method is not high.

Disclosure of Invention

The embodiment of the invention provides a method, a device and a storage medium for detecting the abnormality of a coal-bed gas well, which can improve the accuracy of detecting the abnormality of the coal-bed gas well. The technical scheme is as follows:

In a first aspect, a method for anomaly detection of a coal-bed gas well is provided, the method comprising:

acquiring a plurality of parameter value lists of a target coal-bed gas well to be detected, wherein the parameter value lists correspond to a plurality of production parameters one by one, and each parameter value list comprises parameter values of the corresponding production parameters in each time interval included in a first time period;

according to each parameter value list in the parameter value lists, determining a plurality of parameter change characteristics corresponding to the production parameters one by one, wherein each parameter change characteristic comprises a change trend and a change amount, and the change trend comprises a constant change or a continuous change;

and detecting the abnormality of the target coal-bed gas well according to the multiple parameter change characteristics.

Optionally, the anomaly detection for the target coalbed methane well according to the plurality of parameter variation characteristics includes:

when the change trend of each parameter change feature in the plurality of parameter change features is kept unchanged, determining the current change quantity of coal concentration when the movement speed of a sucker rod of the target coal-bed gas well is increased, wherein the coal concentration is the distance from the liquid level to the bottom of a coal bed in an annular space formed by a sleeve and an oil pipe of the target coal-bed gas well, the oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well;

And if the current variation of the coal seam allowance is smaller than a first reference value, determining that the target coal seam gas well is a first type abnormal coal seam gas well, wherein the first type abnormal coal seam gas well refers to a sand buried coal seam in the coal seam gas well.

Optionally, configuring each production parameter of the plurality of production parameters with a corresponding reference condition, wherein the reference condition comprises a reference change trend and a change amount threshold;

the detecting of the abnormality of the target coalbed methane well according to the plurality of parameter variation characteristics comprises:

when the change trend of at least one parameter change feature exists in the plurality of parameter change features is continuous change, determining at least one production parameter corresponding to the at least one parameter change feature one by one to obtain at least one alternative production parameter;

selecting an alternative production parameter meeting corresponding reference conditions from the at least one alternative production parameter according to the parameter variation characteristic of each alternative production parameter in the at least one alternative production parameter;

and determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions.

Optionally, the plurality of production parameters includes daily gas production, daily water production, casing pressure, coal availability, and line pressure;

The determining the abnormal type of the target coalbed methane well according to the alternative production parameters meeting the corresponding reference conditions comprises the following steps:

when the alternative production parameters meeting the corresponding reference conditions comprise daily gas yield, daily water yield and coal consumption, determining that the target coal-bed gas well is a second type abnormal coal-bed gas well, wherein the second type abnormal coal-bed gas well is an abnormal instrument for testing a working fluid level, and the working fluid level is the distance from the wellhead of the coal-bed gas well to the fluid level in an annular space formed by a sleeve and an oil pipe in the target coal-bed gas well;

when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production and daily water production, determining that the target coal-bed gas well is a third type abnormal coal-bed gas well, wherein the third type abnormal coal-bed gas well means that a migration channel of coal-bed gas in the coal-bed gas well is blocked by coal dust;

when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, determining that the target coal-bed gas well is a fourth type abnormal coal-bed gas well, wherein the fourth type abnormal coal-bed gas well refers to a sucker rod worn oil pipe in the coal-bed gas well;

when the alternative production parameters meeting the corresponding reference conditions comprise pipeline pressure, determining that the target coal-bed gas well is a fifth type abnormal coal-bed gas well, wherein the fifth type abnormal coal-bed gas well refers to that accumulated water or damaged gas pipelines exist in gas pipelines of the coal-bed gas well;

And when the alternative production parameters meeting the corresponding reference conditions comprise casing pressure and daily gas production, determining the target coal-bed gas well as a sixth type abnormal coal-bed gas well, wherein the sixth type abnormal coal-bed gas well refers to that a gas release valve at the wellhead of the coal-bed gas well is problematic.

Optionally, the reference change trend in the reference condition configured for the daily gas production is continuously reduced, and the change amount threshold is a first reference value;

the reference change trend in the reference conditions configured for the daily water yield is continuously reduced, and the change quantity threshold value is a second reference value;

the reference change trend in the reference condition configured for the coal fault is continuously increased, and the change quantity threshold value is a third reference value;

the reference change trend in the reference condition configured for the casing pressure is continuously rising, and the change amount threshold value is a fourth reference value;

the reference trend in the reference condition configured for the line pressure is continuously rising or continuously falling, and the variation threshold is a fifth reference value.

Optionally, after the abnormality detection is performed on the target coalbed methane well according to the plurality of parameter variation characteristics, the method further includes:

determining a treatment strategy for the target coal-bed gas well according to the abnormal type of the target coal-bed gas well;

And displaying the treatment strategy so that a user treats the target coal-bed gas well according to the treatment strategy.

In a second aspect, there is provided an apparatus for anomaly detection of a coal-bed gas well, the apparatus comprising:

the system comprises an acquisition module, a detection module and a control module, wherein the acquisition module is used for acquiring a plurality of parameter value lists of a target coal-bed gas well to be detected, the parameter value lists are in one-to-one correspondence with a plurality of production parameters, and each parameter value list comprises parameter values of the corresponding production parameters in each time interval included in a first time period;

the first determining module is used for determining a plurality of parameter change characteristics corresponding to the production parameters one by one according to each parameter value list in the parameter value lists, wherein each parameter change characteristic comprises a change trend and a change amount, and the change trend comprises a constant change or a continuous change;

and the detection module is used for detecting the abnormality of the target coal-bed gas well according to the multiple parameter change characteristics.

Optionally, the detection module includes:

a first determining unit, configured to determine, when a change trend of each parameter change feature of the plurality of parameter change features is kept unchanged, a current change amount of a coal missing degree when a movement speed of a sucker rod of the target coal-bed gas well is increased, where the coal missing degree is a distance from a liquid level in an annular space formed by a casing pipe of the target coal-bed gas well and an oil pipe to a bottom of a coal bed, the oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well;

And the second determining unit is used for determining that the target coal-bed gas well is a first type abnormal coal-bed gas well if the current variation of the coal concentration is smaller than a first reference value, wherein the first type abnormal coal-bed gas well refers to a sand-buried coal bed in the coal-bed gas well.

the detection module comprises:

a third determining unit, configured to determine at least one production parameter corresponding to the at least one parameter variation feature one-to-one when a variation trend of the at least one parameter variation feature exists in the plurality of parameter variation features is a continuous variation, so as to obtain at least one alternative production parameter;

a selection unit, configured to select an alternative production parameter that meets a corresponding reference condition from the at least one alternative production parameter according to a parameter variation characteristic of each of the at least one alternative production parameter;

and the fourth determining unit is used for determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions.

the fourth determination unit includes:

a first determining subunit, configured to determine that the target coalbed methane well is a second type of abnormal coalbed methane well when the alternative production parameters meeting the corresponding reference conditions include daily gas production, daily water production and coal logging, where the second type of abnormal coalbed methane well is an abnormal instrument for testing a working fluid level, and the working fluid level is a distance from a wellhead of the coalbed methane well to a fluid level in an annular space formed by a casing and an oil pipe in the target coalbed methane well;

the second determining subunit is used for determining that the target coal-bed gas well is a third type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production and daily water production, wherein the third type abnormal coal-bed gas well means that a migration channel of coal-bed gas in the coal-bed gas well is blocked by coal dust;

the third determining subunit is used for determining that the target coal-bed gas well is a fourth type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, wherein the fourth type abnormal coal-bed gas well refers to a sucker rod worn oil pipe in the coal-bed gas well;

A fourth determining subunit, configured to determine, when the alternative production parameter that meets the corresponding reference condition includes a pipeline pressure, that the target coalbed methane well is a fifth type abnormal coalbed methane well, where the fifth type abnormal coalbed methane well refers to that there is water accumulation or damage to a gas pipeline of the coalbed methane well;

and the fifth determination subunit is used for determining that the target coal-bed gas well is a sixth type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise casing pressure and daily gas production, wherein the sixth type abnormal coal-bed gas well refers to that a gas release valve at a wellhead of the coal-bed gas well is problematic.

Optionally, the apparatus further comprises:

the second determining module is used for determining a treatment strategy for the target coal-bed gas well according to the abnormal type of the target coal-bed gas well;

and the display module is used for displaying the treatment strategy so that a user can treat the target coal-bed gas well according to the treatment strategy.

In a third aspect, there is provided an apparatus for anomaly detection of a coal-bed gas well, the apparatus comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of any of the methods of the first aspect above.

In a fourth aspect, a computer readable storage medium has stored thereon instructions which, when executed by a processor, implement the steps of any of the methods of the first aspect above.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the steps of any of the methods described in the first aspect above.

The technical scheme provided by the embodiment of the invention has the beneficial effects that:

in the embodiment of the invention, a plurality of parameter value lists of a target coal-bed gas well are acquired, the parameter value lists are in one-to-one correspondence with a plurality of production parameters, and then the parameter change characteristic of each production parameter in the plurality of production parameters is determined according to the parameter value lists, so that the abnormal type of the target coal-bed gas well is determined according to the parameter change characteristic. That is, in the invention, the abnormal type of the coal-bed gas well is determined through a plurality of parameter change characteristics, rather than directly judging whether the abnormal situation of the coal-bed gas well occurs according to whether the parameter value corresponding to a certain production parameter of the coal-bed gas well is within a preset range, so that the abnormal situation of the coal-bed gas well can be accurately determined through the detection method provided by the embodiment of the invention, and the accuracy rate of detecting the abnormal situation of the coal-bed gas well is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a coal-bed gas well provided by an embodiment of the present invention;

FIG. 2 is a flow chart of a method for anomaly detection for a coal-bed gas well according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a device for anomaly detection of a coalbed methane well according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Reference numerals:

1: a sucker rod; 2: a sleeve; 3: and (5) an oil pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

Before explaining the method for detecting the abnormality of the coal-bed gas well provided by the embodiment of the invention, an explanation is made on the exploitation principle of the coal-bed gas well. The coalbed methane in the coal seam is primarily adsorbed on the surface of the coal in the coal seam, and therefore the pressure in the coal seam needs to be reduced so that the coalbed methane is desorbed from the surface of the coal and flows into the coalbed methane well through natural cracks in the coal seam, after which the coalbed methane is transported to the coalbed methane well head by means disposed in the coalbed methane well and to the gas collection station by means disposed in the coalbed methane well head. The exploitation process of the coalbed methane can be summarized as follows: desorption, diffusion, seepage and output.

Currently, in the production of coalbed methane, as shown in fig. 1, a device disposed in a coalbed methane well may have a casing 2 and a tubing 3, with the tubing 3 being located in the casing 2 and an annular space between the casing 2 and the tubing 3. In addition, a sucker rod 1 is arranged in the coal-bed gas well, and the sucker rod 1 is positioned in an oil pipe 3. During coalbed methane production, sucker rod 1 moves in tubing 3. And the first end of the sucker rod 1 is connected with a walking beam on the pumping unit, and the second end of the sucker rod 1 is connected with a pump at the bottom of a coal-bed gas well. In addition, the device of the wellhead of the coal-bed gas well can be a gas pipeline.

Because the coal seam generally contains formation water, during the production of the coal seam gas, the formation water in the coal seam may flow into the coal seam gas well, and there may be a certain amount of formation water in the annular space in the coal seam gas well. Formation water in the annulus is drained from the tubing 3 and formation water in the coal seam enters the annulus as the formation water in the annulus decreases. When the formation water in the coal bed is reduced, the pressure of the coal bed is reduced, and the desorption of the coal bed gas is promoted, so that the yield of the coal bed gas well can be improved. Wherein the formation water is discharged from the oil pipe 3 mainly by means of the sucker rod 1 and the pump in the oil pipe 3. The pump pumps the formation water in the annular space to the bottom of the oil pipe 3, and the sucker rod 1 moves up and down to pump the formation water out of the oil pipe 3.

In addition, when the coal bed gas in the annular space flows to the wellhead of the coal bed gas well, and is conveyed to the gas collecting station through the gas pipeline of the wellhead of the coal bed gas well, the pressure in the annular space is reduced, so that the pressure in the coal bed is reduced, the desorption of the coal bed gas adsorbed on the surface of the coal is promoted, and the yield of the coal bed gas well can be improved.

Fig. 2 is a flowchart of a method for detecting an abnormality of a coal-bed gas well according to an embodiment of the present invention, as shown in fig. 2, the method includes the following steps:

step 201: acquiring a plurality of parameter value lists of a target coal-bed gas well to be detected, wherein the parameter value lists correspond to a plurality of production parameters one by one, and each parameter value list comprises parameter values of the corresponding production parameters in each time interval included in a first time period.

In the production process of the target coal-bed gas well, a measuring instrument for measuring each of a plurality of production parameters is arranged in the target coal-bed gas well, for any one of the production parameters, a parameter value is measured in real time by the measuring instrument corresponding to the production parameter, and the measurement result of the production parameter is recorded. Thus, in one possible implementation, the obtaining of the plurality of parameter value lists for the target coalbed methane well to be detected may be: and for any one of the production parameters, directly acquiring a plurality of parameter value lists of the target coal-bed gas well to be detected from the measurement result of the measuring instrument corresponding to the production parameter.

Wherein the production parameters may include: daily gas production, daily water production, casing pressure, coal consumption and pipeline pressure. The pipeline pressure refers to the pressure of the gas pipeline.

The coal submergence refers to the distance from the liquid level in an annular space formed by a sleeve and an oil pipe of a target coal-bed gas well to the bottom of the coal bed. The oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well. Specifically, the coal inventory may be calculated from measurements of test instruments disposed in the annular space. Because the distance from the coal bed gas wellhead to the bottom of the coal bed is fixed, the testing instrument in the annular space is used for testing the distance from the liquid level of the formation water in the annular space to the coal bed gas wellhead, and the value obtained by subtracting the monitoring result of the testing instrument from the distance from the coal bed gas wellhead to the bottom of the coal bed is the coal seam missing degree.

For example, as shown in FIG. 1, the distance from the wellhead of the coalbed methane well to the bottom of the coalbed is L, the distance from the surface of the formation water in the annular space to the wellhead of the coalbed methane well is L1, and the coal seam allowance is L-L1.

In addition, each parameter value list includes parameter values for the corresponding production parameter over respective time intervals included in the first time period. The first period of time may be 10 days, 20 days, etc., which is not limited herein.

For example, the first time period is 10 days, and table 1 is a list of parameter values obtained by measuring daily gas production in a plurality of production parameters by using a measuring instrument according to an embodiment of the present invention. The parameter value list shown in table 1 includes parameter values in daily for 10 days of daily gas production. Specifically, on day 1, the daily gas production parameter value was 400. On day 2, the daily gas production parameter value was 403. On day 10, the daily gas production parameter value was 420.

TABLE 1

Step 202: and determining a plurality of parameter change characteristics corresponding to the production parameters one by one according to each parameter value list in the parameter value lists, wherein each parameter change characteristic comprises a change trend and a change amount, and the change trend comprises a constant change or a continuous change. Wherein the continuous change includes continuous rising or continuous falling.

The implementation manner of determining the plurality of parameter variation features corresponding to the plurality of production parameters one by one according to each parameter value list in the plurality of parameter value lists may be: and for any parameter value list in the parameter value lists, performing linear fitting on the parameter values included in the parameter value list, obtaining a straight line after linear fitting, and determining the slope of the straight line. When the absolute value of the slope of the straight line is smaller than or equal to a preset threshold value, the change trend of the parameter change characteristic of the production parameter is kept unchanged. When the slope of the straight line is positive and is larger than a preset threshold value, the change trend of the parameter change characteristic of the production parameter is continuously increased. When the slope of the straight line is negative and smaller than the negative value of the preset threshold, the change trend of the parameter change characteristic of the production parameter is continuously reduced. In addition, the fitted straight line has two endpoints, and the parameter value corresponding to the second endpoint is subtracted from the parameter value corresponding to the first endpoint to obtain the variation of the parameter variation characteristic of the production parameter. The corresponding parameter value of the second endpoint is greater than or equal to the corresponding parameter value of the first endpoint.

For example, table 2 is a list of parameter values for casing pressure provided by an embodiment of the present invention. As shown in table 2, the parameter value of the casing pressure was 2 on day 1. The parameter value of the casing pressure was 2.3 on day 2. The parameter value for the casing pressure was 2.35 on day 3. On day 4, the parameter value of the casing pressure was 2.4. At day 5, the parameter value for the casing pressure was 2.42. At day 6, the parameter value for the casing pressure was 2.49. At day 7, the parameter value for the casing pressure was 2.56. At day 8, the parameter value for the casing pressure was 2.63. At day 9, the parameter value of the casing pressure was 2.71. The parameter value for the casing pressure was 2.8 on day 10. And (3) carrying out linear fitting on the parameter values, wherein the slope of the straight line after fitting is positive and is larger than a preset threshold value, so that the change trend of the parameter change characteristic of the casing pressure is continuously increased. And the parameter value corresponding to the second endpoint of the fitted straight line is 2.8, the parameter value corresponding to the second endpoint is 2, and the variation of the parameter variation characteristic of the casing pressure is determined to be 0.8.

TABLE 2

Step 203: and detecting the abnormality of the target coal-bed gas well according to the change characteristics of the multiple parameters.

According to the characteristics of multiple parameter changes, the abnormality detection of the target coal-bed gas well can be realized by the following two modes:

(1) When the change trend of each parameter change feature in the plurality of parameter change features is kept unchanged, determining the current change amount of the coal failure when the movement speed of the sucker rod of the target coal-bed gas well is increased, and if the current change amount of the coal failure is smaller than a first reference value, determining that the target coal-bed gas well is a first type abnormal coal-bed gas well, wherein the first type abnormal coal-bed gas well refers to a sand-buried coal bed in the coal-bed gas well. The first reference value may be 0 m, 0.1 m, 0.2 m, etc., which is not limited herein.

And before the movement speed of the sucker rod of the target coal-bed gas well is not increased, obtaining a value of the coal ratio according to the monitoring result of the monitoring instrument in the annular space, and taking the value as a first coal ratio. After the movement speed of the sucker rod of the target coal-bed gas well is increased, another coal-to-liquid value is obtained according to the monitoring result of the monitoring instrument in the annular space, and the value is taken as a second coal-to-liquid value. According to the difference value of the first coal ratio and the second coal ratio, the current variation of the coal ratio when the movement speed of the sucker rod of the target coal-bed gas well is increased can be determined. Wherein, increasing the movement speed of the sucker rod of the target coal-bed gas well is also called an up-lifting system.

In addition, when the cracks in the coal bed are increased through hydraulic fracturing, and coal bed gas in the coal bed flows into the coal bed gas well from the pressed cracks, sand in the fracturing fluid is accumulated in the coal bed gas well, and the accumulated height of the sand in the fracturing fluid exceeds the thickness of the coal bed, so that the sand blocks the coal bed gas in the coal bed from flowing into the coal bed gas well, and the coal bed gas cannot be smoothly produced.

(2) A corresponding reference condition is configured for each of the plurality of production parameters, the reference condition including a reference trend of variation and a variation threshold. At this time, according to the plurality of parameter variation characteristics, the abnormality detection for the target coalbed methane well may specifically be: when the change trend of at least one parameter change feature exists in the plurality of parameter change features is continuous change, at least one production parameter corresponding to the at least one parameter change feature one by one is determined, and at least one alternative production parameter is obtained. And selecting the alternative production parameters meeting the corresponding reference conditions from the at least one alternative production parameters according to the parameter variation characteristics of each alternative production parameter in the at least one alternative production parameter. And determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions. Wherein at least one refers to one or more.

When the change trend of at least one parameter change feature exists in the plurality of parameter change features is continuous change, determining at least one production parameter corresponding to the at least one parameter change feature one to one, and obtaining at least one alternative production parameter may be achieved by: any one parameter change characteristic of the plurality of parameter change characteristics is judged, and the change trend of the parameter change characteristic is judged. And when the change trend of the parameter change characteristics is judged to be unchanged, the production parameters corresponding to the parameter change characteristics are not determined to be alternative production parameters. And when the change trend of the parameter change characteristics is judged to be continuous change, determining the production parameters corresponding to the parameter change characteristics as alternative production parameters.

In addition, according to the parameter variation characteristic of each alternative production parameter in the at least one alternative production parameter, the implementation manner of selecting the alternative production parameter meeting the corresponding reference condition from the at least one alternative production parameter is as follows: comparing the parameter variation characteristic of at least one alternative production parameter with the reference condition of the alternative production parameter, and determining the alternative production parameter as the alternative production parameter meeting the reference condition when the variation trend of the parameter variation characteristic of the alternative production parameter is the same as the reference variation trend in the reference condition and the variation of the parameter variation characteristic of the alternative production parameter is greater than or equal to the variation threshold value in the reference condition.

Wherein the reference condition corresponding to each of the plurality of production parameters may be: (1) The reference change trend in the reference conditions configured for daily gas production is continuously reduced, and the change amount threshold is a first reference value. (2) The reference change trend in the reference condition configured for daily water yield is continuously reduced, and the change amount threshold value is a second reference value. (3) The reference change trend in the reference condition configured for the coal fault is continuously rising, and the change amount threshold value is a third reference value. (4) The reference trend in the reference condition configured for the casing pressure is continuously rising, and the variation threshold is a fourth reference value. (5) The reference trend in the reference condition configured for the line pressure is continuously rising or continuously falling, and the variation threshold is a fifth reference value.

For example, the reference conditions for daily gas production are: the trend of change within 10 days was continuously decreasing by 50, i.e., the first reference value was 50. The reference conditions for daily water yield are: the trend of change over 10 days was a continuous decrease of 5% of the daily water yield on day 1 over 10 days, i.e. the second reference value was 5% of the daily water yield on day 1 over 10 days. The reference conditions for coal occupancy were: the trend of change within 10 days is continuous rise or continuous fall, the amount of continuous rise or continuous fall is 5 meters, i.e. the third reference value is 5 meters. The reference conditions for the casing pressure are: the trend within 10 days is continuously rising, the rising amount is 0.1MPa, namely the fourth reference value is 0.1MPa. The reference conditions for line pressure were: the trend of change within 10 days is continuous rise or continuous fall, the continuous rise or continuous fall is 0.01MPa, namely the fifth reference value is 0.01MPa.

In addition, according to the alternative production parameters meeting the corresponding reference conditions, the determination of the abnormal type of the target coal-bed gas well can have the following 5 conditions:

and (c) determining that the target coal-bed gas well is a second type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas yield, daily water yield and coal consumption, wherein the second type abnormal coal-bed gas well is an abnormal instrument for testing the working fluid level, and the working fluid level is the distance from the wellhead of the coal-bed gas well to the fluid level in an annular space formed by a sleeve and an oil pipe in the target coal-bed gas well.

Wherein an anomaly in the instrument for testing the meniscus has resulted in inaccurate meniscus measurements of formation water in the annulus in the coalbed methane well, e.g., the meniscus in the annulus has risen, but the instrument for testing the meniscus has displayed a value that is also the value that the meniscus has not risen. In practice, the working fluid level is raised, and the value of the working fluid level measured by the instrument for testing the working fluid level is not raised, so that when the formation water in the annular space is pumped out through the movement of the sucker rod to improve the yield of the target coalbed methane well, the amount of the formation water in the annular space to be pumped out is determined according to the value measured by the testing instrument, and the inaccuracy of the measurement by the testing instrument causes the inaccuracy of the pumped out amount of water, thereby affecting the inaccuracy of the pressure change in the annular space and further affecting the yield of the target coalbed methane well.

And b, when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production and daily water production, determining that the target coal-bed gas well is a third type of abnormal coal-bed gas well, wherein the third type of abnormal coal-bed gas well means that a migration channel of the coal-bed gas in the coal-bed gas well in the coal-bed is blocked by coal dust.

The coal bed gas in the coal bed normally flows into the coal bed gas well through the cracks in the coal bed, coal dust in the coal bed is driven to move in the flowing process of the cracks in the coal bed gas coal bed, the coal dust is suspended in the cracks of the coal bed, and after the suspended coal dust is settled and aggregated, the cracks in the coal bed are blocked, so that the coal bed gas is prevented from flowing into the target coal bed gas well from the cracks in the coal bed.

And c, when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, determining that the target coal-bed gas well is a fourth type of abnormal coal-bed gas well, wherein the fourth type of abnormal coal-bed gas well refers to that a sucker rod in the coal-bed gas well wears an oil pipe.

In which coal-bed gas wells are sometimes not vertical but have a slope, but sucker rods are vertical in coal-bed gas wells. And the sucker rod is connected with the oil pipe through the packing at the coal bed gas wellhead. Because the sucker rod is vertical, the oil pipe is inclined along with the inclination of the coal-bed gas well in the coal-bed gas well, so that the sucker rod possibly wears the oil pipe in the moving process. The oil pipe may be worn at the wellhead of the coalbed methane, and the oil pipe may also be worn in the well of the coalbed methane, and after the oil pipe is worn out, the coalbed methane in the annular space flows into the oil pipe through the worn-out part of the oil pipe, and as the formation water in the oil pipe is discharged, the coalbed methane which should flow from the annular space is reduced, and thus the yield of the target coalbed methane well is reduced.

And d, when the alternative production parameters meeting the corresponding reference conditions comprise pipeline pressure, determining that the target coal-bed gas well is a fifth type abnormal coal-bed gas well, wherein the fifth type abnormal coal-bed gas well refers to that accumulated water or damaged gas pipeline exists in the gas pipeline of the coal-bed gas well.

The gas pipeline of the coal-bed gas well is arranged at the wellhead of the coal-bed gas well and is specially used for conveying the coal-bed gas produced from the coal-bed gas well. Because the coal bed gas flows into the gas pipeline from the annular space, and the annular space contains formation water, the coal bed gas entering the gas pipeline can carry water vapor. When the coalbed methane moves in the gas transmission pipeline, the water vapor carried in the coalbed methane begins to condense and is attached to the gas transmission pipeline when meeting the position with lower temperature. When the water content in the gas pipeline increases, the migration of the coal bed gas is blocked.

The damage of the gas pipeline means that a leakage point appears in the gas pipeline, and coal bed gas in the gas pipeline can be overflowed from the leakage point in the gas pipeline to the outside of the gas pipeline.

And e, determining that the target coal-bed gas well is a sixth type of abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise casing pressure and daily gas production, wherein the sixth type of abnormal coal-bed gas well refers to that a gas release valve at the wellhead of the coal-bed gas well is problematic.

And a gas release valve is arranged at the wellhead of the coal-bed gas well, and the coal-bed gas in the annular space in the coal-bed gas well is released through gas release. The speed of the coalbed methane in the annular space flowing into the gas transmission pipeline from the annular space can be controlled through the air release valve, so that the pressure in the annular space can be controlled, and the yield of the coalbed methane well can be regulated. When a bleed valve becomes problematic, the pressure in the annular space is not precisely controlled, thereby affecting the production of the coalbed methane well.

In the embodiment of the invention, the first type of abnormal coal-bed gas well can be represented by a coal-bed gas well HP-X, the second type of coal-bed gas well can be represented by a coal-bed gas well HP-Y, the third type of coal-bed gas well can be represented by a coal-bed gas well HP-Z, the fourth type of coal-bed gas well can be represented by a coal-bed gas well ZZ-X, the fifth type of coal-bed gas well can be represented by a coal-bed gas well ZZ-Y, and the sixth type of coal-bed gas well can be represented by a coal-bed gas well ZS-X.

The determining that the coal-bed gas well is a first type abnormal coal-bed gas well, a second type abnormal coal-bed gas well, a third type abnormal coal-bed gas well, a fourth type abnormal coal-bed gas well, a fifth type abnormal coal-bed gas well and a sixth type abnormal coal-bed gas well may be determined according to the correspondence between the characteristic of the change of the plurality of parameters of the coal-bed gas well and the abnormal type of the coal-bed gas well. The corresponding relation between the multiple parameter change characteristics of the coal-bed gas well and the abnormal type of the coal-bed gas well is set by an operator according to experience in advance.

For example, table 3 shows correspondence between a plurality of parameter variation characteristics of a coalbed methane well and abnormal types of the coalbed methane well according to an embodiment of the present invention. As shown in table 3, when the trend of change of each of the plurality of parameters is unchanged and the current variation of the movement speed of the sucker rod is smaller than the first reference value, the abnormality type of the correspondingly arranged coal-bed gas well is the first type of abnormal coal-bed gas well. When the daily gas yield, the daily water yield and the coal consumption meet the reference conditions and other production parameters are unchanged, the corresponding abnormal type of the coal-bed gas well is a second type abnormal coal-bed gas well. When the daily gas production and the daily water production meet the reference conditions and other production parameters are unchanged, the abnormal type of the correspondingly arranged coal-bed gas well is a third type abnormal coal-bed gas well. When daily gas production meets the reference condition and other production parameters are unchanged, the abnormal type of the correspondingly arranged coal-bed gas well is a fourth type abnormal coal-bed gas well. And when the pipeline pressure meets the reference condition and other production parameters are unchanged, the abnormal type of the correspondingly arranged coal-bed gas well is a fifth abnormal type coal-bed gas well. And when the casing pressure and daily gas production meet the reference conditions and other production parameters are unchanged, the abnormal type of the correspondingly arranged coal-bed gas well is a sixth type abnormal coal-bed gas well.

TABLE 3 Table 3

For example, as shown in table 4, when the trend of change of each of the plurality of parameters is unchanged and the current amount of change of the coal fault is less than 0.1 meter for increasing the movement speed of the sucker rod, the abnormal type of the coal-bed gas well is the first type of abnormal coal-bed gas well. When the variation trend of daily gas production in 10 days is continuously reduced, the reduced quantity exceeds 50 square, the variation trend of daily water production in 10 days is continuously reduced, the reduced quantity exceeds 5% of daily water production in 1 st day in 10 days, the variation trend of coal submergence in 10 days is continuously increased or continuously reduced, the continuously increased or continuously reduced quantity exceeds 5 meters, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is the second type abnormal coal-bed gas well. When the variation trend of daily gas production within 10 days is continuously reduced, the reduction amount exceeds 50 square, the variation trend of daily water production within 10 days is continuously reduced, the reduction amount exceeds 5% of daily water production within 1 st day within 10 days, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is a third type of abnormal coal-bed gas well. When the change trend of daily gas production within 10 days is continuous decline, the decline exceeds 50 sides, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is a fourth abnormal type coal-bed gas well. And when the change trend of the pipeline pressure within 10 days is continuous rising or continuous falling, the continuous rising amount or continuous falling amount exceeds 0.01MPa, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is a fifth abnormal type of the coal-bed gas well. When the change trend of the casing pressure within 10 days is continuously rising, the rising amount exceeds 0.1MPa, the change trend of daily gas production within 10 days is continuously falling, the falling amount exceeds 50 sides, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is the abnormal coal-bed gas well of the sixth type.

TABLE 4 Table 4

In addition, after abnormality detection is performed on the target coalbed methane well according to the plurality of parameter variation characteristics, the following steps may be further performed: and determining a treatment strategy for the target coal-bed gas well according to the abnormal type of the target coal-bed gas well. And displaying the treatment strategy so that the user can treat the target coal-bed gas well according to the treatment strategy.

The implementation manner of determining the treatment strategy for the target coal-bed gas well according to the abnormal type of the target coal-bed gas well can be as follows: and storing the corresponding relation between the abnormal type of the target type coal-bed gas well and the governance strategy of the target coal-bed gas well in advance, and searching the governance strategy corresponding to the abnormal type of the target coal-bed gas well from the corresponding relation.

For example, table 5 is a correspondence between an abnormal type of a target type coalbed methane well and a treatment strategy of the target coalbed methane well provided by an embodiment of the present invention. As shown in table 5, when the abnormal type of the target coalbed methane is the first type of abnormal coalbed methane well, the corresponding treatment measures are pump detection and sand bailing. When the abnormal type of the target coal-bed gas well is the abnormal coal-bed gas well of the second type, the corresponding treatment measure is to replace the test instrument. When the abnormal type of the target coal-bed gas well is the abnormal coal-bed gas well of the third type, the corresponding treatment measure is to slow down the deflation amplitude, and fracture and blockage are removed. When the abnormal type of the target coal-bed gas well is the fourth abnormal type of the coal-bed gas well, the corresponding treatment measure is to replace the oil pipe. When the abnormal type of the target coal-bed gas well is the abnormal coal-bed gas well of the fifth type, the corresponding treatment measures are to discharge accumulated water of the gas pipeline or check whether the gas pipeline has leakage points and treat the leakage points. When the abnormal type of the target coal-bed gas well is the abnormal coal-bed gas well of the sixth type, the corresponding treatment measure is to replace the gas release valve.

TABLE 5

The pump inspection refers to replacement of the pump in the oil pipe. The sand fishing means that sand in the coal-bed gas well is fished through a sand fishing tool. Slowing down the bleed amplitude refers to slowing down the release of coal bed gas in the annular space through a bleed valve at the wellhead of the coal bed gas well. Verifying the data of the meniscus in the annular space means re-measuring the meniscus in the annular space. The pressure cracking blocking means that the coal bed is fractured by injecting fracturing fluid into the coal bed, so that cracks are formed in the coal bed. The accumulated water in the discharge pipeline refers to the accumulated water in the gas pipeline being discharged through a special water discharging valve on the gas pipeline. Adjusting the frequency of releasing the coalbed methane in the coalbed methane well refers to adjusting the release times of releasing the coalbed methane in the coalbed methane well by adjusting the switching times of the deflation valve.

When the detection method provided by the embodiment of the invention is practically applied, the abnormal type of the coal-bed gas well can be determined according to the change characteristics of a plurality of production parameters of the target coal-bed gas well, and further, the governance measures can be determined. The detection efficiency of the coal-bed gas well can be greatly improved, and the yield of the coal-bed gas well can be further improved.

Further, in order to verify the detection method provided by the implementation of the invention, when the detection method is applied on site, the abnormal type of the coal-bed gas is determined to be the abnormal coal-bed gas well of the sixth type according to the change characteristics of a plurality of parameters of a certain coal-bed gas well, namely, the problem occurs in a gas release valve. Finding out the corresponding treatment strategy to replace the air release valve. After the gas release valve is replaced according to the treatment strategy, the daily gas yield of the coal-bed gas well is increased by 1384, the detection method provided by the embodiment of the invention is verified, and the treatment strategy provided by the embodiment of the invention is verified.

For another example, the abnormal type of the coal-bed gas is determined to be a fourth abnormal type of the coal-bed gas according to a plurality of parameter change characteristics of the coal-bed gas well, namely, a sucker rod in the coal-bed gas well wears an oil pipe. Finding out the corresponding treatment strategy to replace the oil pipe. After the oil pipe is replaced according to the treatment strategy, the daily gas yield of the coal-bed gas well is increased by 100, the detection method provided by the embodiment of the invention is verified, and the treatment strategy provided by the embodiment of the invention is verified.

Fig. 3 is a schematic diagram of an apparatus for anomaly detection of a coalbed methane well according to an embodiment of the present invention, where, as shown in fig. 3, an apparatus 300 includes:

the obtaining module 301 is configured to obtain a plurality of parameter value lists of a target coalbed methane well to be detected, where the plurality of parameter value lists are in one-to-one correspondence with a plurality of production parameters, and each parameter value list includes parameter values of the corresponding production parameters in each time interval included in the first time period;

a first determining module 302, configured to determine, according to each parameter value list in the plurality of parameter value lists, a plurality of parameter variation features corresponding to a plurality of production parameters one to one, where each parameter variation feature includes a variation trend and a variation amount, and the variation trend includes a constant variation or a continuous variation;

the detection module 303 is configured to perform anomaly detection on the target coalbed methane well according to the plurality of parameter variation characteristics.

Optionally, the detection module 303 includes:

the first determining unit is used for determining the current variation of the coal missing degree when the movement speed of the sucker rod of the target coal-bed gas well is increased when the variation trend of each parameter variation characteristic is kept unchanged, wherein the coal missing degree refers to the distance from the liquid level in an annular space formed by a sleeve and an oil pipe of the target coal-bed gas well to the bottom of the coal bed, the oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well;

the detection module 303 includes:

the third determining unit is used for determining at least one production parameter corresponding to the at least one parameter change feature one by one to obtain at least one alternative production parameter when the change trend of the at least one parameter change feature exists in the plurality of parameter change features to be continuously changed;

a selection unit, configured to select an alternative production parameter that meets a corresponding reference condition from at least one alternative production parameter according to a parameter variation characteristic of each of the at least one alternative production parameter;

Optionally, the plurality of production parameters includes daily gas production, daily water production, casing pressure, coal inventory, and line pressure;

The fourth determination unit includes:

a first determining subunit, configured to determine that the target coalbed methane well is a second type of abnormal coalbed methane well when the alternative production parameters that meet the corresponding reference conditions include daily gas production, daily water production and coal seam loss, where the second type of abnormal coalbed methane well is an abnormal instrument for testing a working fluid level, and the working fluid level is a distance from a wellhead of the coalbed methane well to a fluid level in an annular space formed by a casing and an oil pipe in the target coalbed methane well;

the second determining subunit is used for determining that the target coal-bed gas well is a third type of abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production and daily water production, wherein the third type of abnormal coal-bed gas well means that a migration channel of coal-bed gas in the coal-bed gas well is blocked by coal dust;

a fourth determining subunit, configured to determine, when the alternative production parameter that meets the corresponding reference condition includes a pipeline pressure, that the target coalbed methane well is a fifth type abnormal coalbed methane well, where the fifth type abnormal coalbed methane well refers to that there is water accumulation or damage to a gas pipeline in the gas pipeline of the coalbed methane well;

And the fifth determination subunit is used for determining that the target coal-bed gas well is a sixth type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise the casing pressure and daily gas production, wherein the sixth type abnormal coal-bed gas well refers to that a gas release valve at the wellhead of the coal-bed gas well has a problem.

Optionally, the reference change trend in the reference condition configured for daily gas production is continuously reduced, and the change amount threshold is a first reference value;

the reference change trend in the reference condition configured for daily water yield is continuously reduced, and the change quantity threshold value is a second reference value;

Optionally, the apparatus 300 further comprises:

It should be noted that: in the device for detecting abnormality of a coalbed methane well provided in the above embodiment, only the division of the above functional modules is used for illustrating when abnormality is detected of a coalbed methane well, in practical application, the above functional allocation may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the device for detecting the abnormality of the coal-bed gas well provided in the above embodiment and the method embodiment for detecting the abnormality of the coal-bed gas well belong to the same concept, and the specific implementation process of the device is detailed in the method embodiment and will not be described herein.

Fig. 4 shows a block diagram of a terminal 400 according to an exemplary embodiment of the present invention. The terminal 400 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion picture expert compression standard audio plane 3), an MP4 (Moving Picture Experts Group Audio Layer IV, motion picture expert compression standard audio plane 4) player, a notebook computer, or a desktop computer. The terminal 400 may also be referred to by other names as user equipment, portable terminal, laptop terminal, desktop terminal, etc.

In general, the terminal 400 includes: a processor 401 and a memory 402.

Processor 401 may include one or more processing cores such as a 4-core processor, an 8-core processor, etc. The processor 401 may be implemented in at least one hardware form of DSP (Digital Signal Processing ), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array ). The processor 401 may also include a main processor, which is a processor for processing data in an awake state, also called a CPU (Central Processing Unit ), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 401 may integrate a GPU (Graphics Processing Unit, image processor) for rendering and drawing of content required to be displayed by the display screen. In some embodiments, the processor 401 may also include an AI (Artificial Intelligence ) processor for processing computing operations related to machine learning.

Memory 402 may include one or more computer-readable storage media, which may be non-transitory. Memory 402 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 402 is used to store at least one instruction for execution by processor 401 to implement the method for anomaly detection of coal bed methane provided by the method embodiments of the present invention.

In some embodiments, the terminal 400 may further optionally include: a peripheral interface 403 and at least one peripheral. The processor 401, memory 402, and peripheral interface 403 may be connected by a bus or signal line. The individual peripheral devices may be connected to the peripheral device interface 403 via buses, signal lines or a circuit board. Specifically, the peripheral device includes: at least one of radio frequency circuitry 404, a touch display screen 405, a camera assembly 406, audio circuitry 407, a positioning assembly 408, and a power supply 409.

Peripheral interface 403 may be used to connect at least one Input/Output (I/O) related peripheral to processor 401 and memory 402. In some embodiments, processor 401, memory 402, and peripheral interface 403 are integrated on the same chip or circuit board; in some other embodiments, either or both of the processor 401, memory 402, and peripheral interface 403 may be implemented on separate chips or circuit boards, which is not limited in this embodiment.

The Radio Frequency circuit 404 is configured to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuitry 404 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 404 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 404 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. The radio frequency circuitry 404 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity ) networks. In some embodiments, the radio frequency circuitry 404 may also include NFC (Near Field Communication ) related circuitry, which is not limiting of the invention.

The display screen 405 is used to display a UI (useinterface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 405 is a touch display screen, the display screen 405 also has the ability to collect touch signals at or above the surface of the display screen 405. The touch signal may be input as a control signal to the processor 401 for processing. At this time, the display screen 405 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 405 may be one, providing a front panel of the terminal 400; in other embodiments, the display 405 may be at least two, and disposed on different surfaces of the terminal 400 or in a folded design; in still other embodiments, the display 405 may be a flexible display disposed on a curved surface or a folded surface of the terminal 400. Even more, the display screen 405 may be arranged in an irregular pattern that is not rectangular, i.e. a shaped screen. The display 405 may be made of LCD (Liquid Crystal Display ), OLED (Organic Light-Emitting Diode) or other materials.

The camera assembly 406 is used to capture images or video. Optionally, camera assembly 406 includes a front camera and a rear camera. Typically, the front camera is disposed on the front panel of the terminal and the rear camera is disposed on the rear surface of the terminal. In some embodiments, the at least two rear cameras are any one of a main camera, a depth camera, a wide-angle camera and a tele camera, so as to realize that the main camera and the depth camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting and VR (virtual reality) shooting function or other fusion shooting functions. In some embodiments, camera assembly 406 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The dual-color temperature flash lamp refers to a combination of a warm light flash lamp and a cold light flash lamp, and can be used for light compensation under different color temperatures.

The audio circuit 407 may include a microphone and a speaker. The microphone is used for collecting sound waves of users and environments, converting the sound waves into electric signals, and inputting the electric signals to the processor 401 for processing, or inputting the electric signals to the radio frequency circuit 404 for realizing voice communication. For the purpose of stereo acquisition or noise reduction, a plurality of microphones may be respectively disposed at different portions of the terminal 400. The microphone may also be an array microphone or an omni-directional pickup microphone. The speaker is used to convert electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The speaker may be a conventional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only the electric signal can be converted into a sound wave audible to humans, but also the electric signal can be converted into a sound wave inaudible to humans for ranging and other purposes. In some embodiments, audio circuit 407 may also include a headphone jack.

The location component 408 is used to locate the current geographic location of the terminal 400 to enable navigation or LBS (Location Based Service, location-based services). The positioning component 408 may be a positioning component based on the united states GPS (Global Positioning System ), the beidou system of china, the grainer system of russia, or the galileo system of the european union.

The power supply 409 is used to power the various components in the terminal 400. The power supply 409 may be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When power supply 409 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, the terminal 400 further includes one or more sensors 410. The one or more sensors 410 include, but are not limited to: acceleration sensor 411, gyroscope sensor 412, pressure sensor 413, fingerprint sensor 414, optical sensor 415, and proximity sensor 416.

The acceleration sensor 411 may detect the magnitudes of accelerations on three coordinate axes of the coordinate system established with the terminal 400. For example, the acceleration sensor 411 may be used to detect components of gravitational acceleration on three coordinate axes. The processor 401 may control the touch display screen 405 to display a user interface in a lateral view or a longitudinal view according to the gravitational acceleration signal acquired by the acceleration sensor 411. The acceleration sensor 411 may also be used for the acquisition of motion data of a game or a user.

The gyro sensor 412 may detect a body direction and a rotation angle of the terminal 400, and the gyro sensor 412 may collect a 3D motion of the user to the terminal 400 in cooperation with the acceleration sensor 411. The processor 401 may implement the following functions according to the data collected by the gyro sensor 412: motion sensing (e.g., changing UI according to a tilting operation by a user), image stabilization at shooting, game control, and inertial navigation.

The pressure sensor 413 may be disposed at a side frame of the terminal 400 and/or at a lower layer of the touch display 405. When the pressure sensor 413 is disposed at a side frame of the terminal 400, a grip signal of the terminal 400 by a user may be detected, and the processor 401 performs a left-right hand recognition or a shortcut operation according to the grip signal collected by the pressure sensor 413. When the pressure sensor 413 is disposed at the lower layer of the touch display screen 405, the processor 401 controls the operability control on the UI interface according to the pressure operation of the user on the touch display screen 405. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

The fingerprint sensor 414 is used to collect a fingerprint of the user, and the processor 401 identifies the identity of the user based on the fingerprint collected by the fingerprint sensor 414, or the fingerprint sensor 414 identifies the identity of the user based on the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, the user is authorized by the processor 401 to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying for and changing settings, etc. The fingerprint sensor 414 may be provided on the front, back or side of the terminal 400. When a physical key or vendor Logo is provided on the terminal 400, the fingerprint sensor 414 may be integrated with the physical key or vendor Logo.

The optical sensor 415 is used to collect the ambient light intensity. In one embodiment, the processor 401 may control the display brightness of the touch display screen 405 according to the ambient light intensity collected by the optical sensor 415. Specifically, when the intensity of the ambient light is high, the display brightness of the touch display screen 405 is turned up; when the ambient light intensity is low, the display brightness of the touch display screen 405 is turned down. In another embodiment, the processor 401 may also dynamically adjust the shooting parameters of the camera assembly 406 according to the ambient light intensity collected by the optical sensor 415.

A proximity sensor 416, also referred to as a distance sensor, is typically provided on the front panel of the terminal 400. The proximity sensor 416 is used to collect the distance between the user and the front of the terminal 400. In one embodiment, when the proximity sensor 416 detects a gradual decrease in the distance between the user and the front face of the terminal 400, the processor 401 controls the touch display 405 to switch from the bright screen state to the off screen state; when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually increases, the processor 401 controls the touch display screen 405 to switch from the off-screen state to the on-screen state.

Those skilled in the art will appreciate that the structure shown in fig. 4 is not limiting of the terminal 400 and may include more or fewer components than shown, or may combine certain components, or may employ a different arrangement of components.

The embodiment of the invention also provides a non-transitory computer readable storage medium, when the instructions in the storage medium are executed by a processor of the mobile terminal, the mobile terminal can execute the method for detecting the abnormality of the coalbed methane provided by the embodiment shown in the figure 2.

The embodiment of the invention also provides a computer program product containing instructions, which when run on a computer, cause the computer to execute the method for detecting the abnormality of the coalbed methane provided by the embodiment shown in the figure 2.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

In summary, the present invention is not limited to the preferred embodiments, but includes all modifications, equivalents, and improvements falling within the spirit and principles of the present invention.

Claims

1. A method of anomaly detection for a coal-bed gas well, the method comprising:

determining a plurality of parameter change characteristics corresponding to the production parameters one by one according to each parameter value list in the parameter value lists, wherein each parameter change characteristic comprises a change trend and a change amount, the change trend comprises a constant change or a continuous change, each production parameter in the production parameters is configured with a corresponding reference condition, the reference condition comprises a reference change trend and a change amount threshold, and the production parameters comprise daily gas yield, daily water yield, casing pressure, coal concentration and pipeline pressure;

2. The method of claim 1, wherein the method further comprises:

3. The method of claim 1, wherein the reference trend in the reference conditions configured for the daily gas production is continuously decreasing and the variation threshold is a first reference value;

4. A method according to any one of claims 1 to 3, wherein the method further comprises:

5. An apparatus for anomaly detection of a coal-bed gas well, the apparatus comprising:

A first determining module, configured to determine, according to each parameter value list in the plurality of parameter value lists, a plurality of parameter variation characteristics corresponding to the plurality of production parameters one to one, where each parameter variation characteristic includes a variation trend and a variation amount, the variation trend includes a constant or continuous variation, each production parameter in the plurality of production parameters is configured with a corresponding reference condition, the reference condition includes a reference variation trend and a variation amount threshold, and the plurality of production parameters include daily gas production, daily water production, casing pressure, coal consumption and pipeline pressure;

the detection module comprises:

the fourth determining unit is used for determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions;

The fourth determination unit includes:

6. The apparatus of claim 5, wherein the detection module comprises:

7. The apparatus of claim 5, wherein the reference trend in the reference conditions configured for the daily gas production is continuously decreasing and the variance threshold is a first reference value;

8. The apparatus according to any one of claims 5 to 7, further comprising:

9. An apparatus for anomaly detection of a coal bed gas well, the apparatus comprising:

A processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of any of the methods of claims 1 to 4.

10. A computer readable storage medium having stored thereon instructions which, when executed by a processor, implement the steps of the method of any of claims 1 to 4.