CN116641701A - Logging device, data acquisition method of logging device and logging system - Google Patents

Abstract

The application discloses a logging device, a data acquisition method of the logging device and a logging system, comprising the following steps: the ground system is used for sending a cable logging starting communication instruction to the telemetering communication nipple through the communication cable; the logging instrument is used for acquiring logging data, storing the logging data in a storage unit of the logging instrument, and simultaneously transmitting the logging data to the telemetering communication nipple based on a cable logging communication command; and the telemetering communication nipple is used for receiving and storing logging data and transmitting the logging data to a ground system through a communication cable in a preset transmission format. By realizing the function of simultaneously storing logging data acquired by logging instruments in a storage unit of the logging instruments and transmitting the logging data to a ground system for storage through a communication cable, the technical problems of time cost and logging cost increase caused by the fact that in the process of underground measurement, once data loss occurs, the logging data can only be subjected to secondary logging in the prior art are solved, and the technical effects of improving logging stability and success rate are realized.

Description

Logging device, data acquisition method of logging device and logging system

technical field

The embodiments of the present invention relate to the technical field of geological survey, in particular to a logging device, a data acquisition method of the logging device, and a logging system.

Background technique

At present, the downhole temperature and pressure of many wells to be measured in China are extremely high, and the downhole working environment of the instrument is extremely harsh. Staying downhole for a long time will cause problems such as data errors, intermittent or stop working of the instrument, and even cause the instrument to fail. Storage unit and probe damaged. Therefore, this severe well condition requires the tool to stay downhole for as short a time as possible.

However, during the logging process, after the logging instrument is sent downhole, the collected logging data is usually directly stored in the logging instrument. Since the logging environment is an extremely harsh underground environment such as high temperature, if the Any fault in the operation of the logging instrument will lead to the loss of logging data storage, which cannot be found immediately at the moment of collection. Only when the logging process is completed and the logging instrument returns to the ground can it be known. Sending the logging instrument downhole for re-measurement not only prolongs the logging time, but also increases the logging cost.

Contents of the invention

The embodiment of the present invention provides a logging device, a data acquisition method of the logging device, and a logging system, which solves the problem that in the prior art, in the process of downhole measurement, only secondary logging can be performed once data is missing. The time cost and the technical problem of increased logging cost.

An embodiment of the present invention provides a logging device, which includes a ground system, a communication cable, a telemetry communication nipple, and at least one logging instrument equipped with a storage unit:

The ground system is connected to the telemetry communication sub-section through the communication cable, and the telemetry communication sub-section is connected to the logging tool through a plug-in structure;

The ground system sends an instruction to enable cable logging communication to the telemetry communication sub-section through the communication cable;

The well logging instrument is used to collect well logging data, store the well logging data in its own storage unit, and simultaneously transmit the well logging data to the telemetry communication sub-section based on the command to start the cable logging communication. well data;

The telemetry communication sub-section receives and stores the logging data, and at the same time transmits the logging data to the surface system through the communication cable in a preset transmission format.

Further, the surface system is further configured to process the received logging data in the preset transmission format by using the maximum likelihood method.

Further, the storage unit of the logging tool includes a main storage subunit and a backup storage subunit;

The logging data collected by the logging tool is stored in the main storage subunit and the backup storage subunit at the same time.

Further, the well logging instrument also includes a well logging unit, a power supply unit and a communication unit;

The logging unit is used to collect the logging data;

The power supply unit is used to supply power to the communication unit, the storage unit, and the logging unit;

The communication unit is used to realize the communication connection between the logging instrument and the telemetry communication sub-section.

Further, the power supply unit includes a main power supply subunit and a backup power supply subunit;

The main power subunit is used to supply power to the communication unit, the storage unit, and the logging unit;

The backup power supply subunit is used to assist in supplying power to the communication unit, the storage unit and the logging unit when the power of the main power supply subunit is insufficient.

Further, the logging tool further includes a storage configuration book, the storage configuration book is used to initialize the storage unit in the logging tool on the surface, and is also used to complete the data of the logging tool After collection, the logging data in the storage unit is read.

Further, the telemetry communication sub-section includes a storage module, a power module and a communication module;

The communication module is used to receive the start wireline logging communication command sent by the surface system, and send the start wireline logging communication command to the logging tool, and is also used to receive all the logging tools in parallel. The logging data transmitted by the well tool, storing the logging data in the storage module, and simultaneously transmitting the logging data to the surface system in the preset transmission format through the communication cable ;

The power supply module is used to supply power to the storage module and the communication module.

Further, the plug structure includes an upper joint and a lower joint;

The telemetry communication sub-section is connected to the upper sub-joint of the target logging tool through the lower joint, wherein the target logging tool is the logging tool directly connected to the telemetry communication sub-section;

The lower sub of the target logging tool is used to connect with the upper sub of another logging tool.

The embodiment of the present invention also provides a data acquisition method of a logging device, the data acquisition method is applied to the logging device described in any of the above embodiments, and the data acquisition method includes:

The ground system sends an instruction to start the cable logging communication to the telemetry communication sub through the communication cable;

The telemetry communication sub-section sends the command to start the wireline logging communication to the logging instrument;

The well logging instrument collects well logging data, stores the well logging data in its own storage unit, and simultaneously transmits the well logging data to the telemetry communication sub-section based on the command to start the cable logging communication;

The telemetry communication sub-section receives and stores the logging data, and at the same time transmits the logging data to the surface system through the communication cable in a preset transmission format.

An embodiment of the present invention also provides a logging system, which includes the logging device described in any of the above embodiments.

The embodiment of the present invention discloses a well logging device, a data acquisition method of the well logging device and a well logging system. The well logging device includes: a ground system, which is used to send an instruction to start the cable logging communication to the telemetry communication sub-section through a communication cable; Logging instrument, used to collect logging data, store the logging data in its own storage unit, and at the same time transmit the logging data to the telemetry communication sub-section based on the command to open the cable logging communication; the telemetry communication sub-section, receive and store Logging data, and at the same time, the logging data is transmitted to the surface system through the communication cable in the preset transmission format. This application solves the problem of data loss in the process of downhole measurement in the prior art by realizing the function of simultaneously storing the logging data collected by the logging instrument in its own storage unit and transmitting it to the ground system for storage through the communication cable. Then only the time cost and the technical problem of increased logging cost caused by secondary logging can only be performed, and the technical effect of improving logging stability and success rate is realized.

Description of drawings

Fig. 1 is a structural diagram of a logging device provided by an embodiment of the present invention;

Fig. 2 is a structural diagram of another logging device provided by an embodiment of the present invention;

Fig. 3 is a flowchart of a data acquisition method of a logging device provided by an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

It should be noted that the terms "first" and "second" in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to limit a specific order. The following embodiments of the present invention may be implemented independently, or may be implemented in combination with each other, which is not specifically limited in the embodiments of the present invention.

Fig. 1 is a structural diagram of a well logging device provided by an embodiment of the present invention. As shown in Figure 1, the logging device includes a surface system 10, a communication cable 20, a telemetry communication sub-section 30, and at least one logging instrument 40 provided with a storage unit 41: the surface system 10 communicates with the telemetry communication sub-section through the communication cable 20 30, and the telemetry communication sub 30 is connected with the logging tool 40 through the plug structure 50.

The surface system 10 sends an instruction to start the cable logging communication to the telemetry communication sub-section 30 through the communication cable 20; the logging instrument 40 is used to collect logging data, store the logging data in its own storage unit 41, and simultaneously The logging communication command transmits the logging data to the telemetry communication sub 30 ; the telemetry communication sub 30 receives and stores the logging data, and simultaneously transmits the logging data to the surface system 10 through the communication cable 20 in a preset transmission format.

Specifically, before the logging instruments 40 go downhole to perform measurements, each logging instrument 40 will start the storage mode, and connect in a bamboo-shaped connection as shown in FIG. It is connected with the ground system 10 . The connection between the telemetry communication nipple 30 and one well logging tool 40 is shown as an example in FIG. 1 . During actual well logging, multiple well logging tools 40 will be connected sequentially. When the logging tool 40 goes down the well, the surface system 10 sends an instruction to start the cable logging communication to the telemetry communication nipple 30 through the communication cable 20, so that the logging tool 40 enters the cable logging working mode, and the storage working mode will not be interrupted at this time. The logging tool 40 works in two working modes at the same time, until the surface system 10 sends a command to stop the wireline logging communication, then the logging tool 40 exits the wireline logging working mode and only works in the storage working mode.

After the logging tool 40 goes into the well and enters into the cable logging working mode based on the command to start the cable logging communication issued by the telemetry communication sub 30, the logging data will be collected. On the one hand, the logging tool 40 is in the storage working mode The logging data will be stored in its own storage unit 41. On the other hand, the logging instrument 40 will transmit the logging data to the telemetry communication sub-section 30 in the wireline logging working mode, so that the telemetry communication sub-section 30 can communicate The cable 20 transmits the logging data to the surface system 10 in a preset transmission format. The preset transmission format may be a square wave, or other formats that require less power for transmission, which is not specifically limited here.

Exemplarily, taking the preset transmission format as square wave as an example, after the logging instrument 40 collects relevant logging data, a square wave signal with logging data is generated, which is forwarded by the telemetry communication sub-section 30, From the communication cable 20 to the surface system 10 . In the prior art, the traditional modulated sine wave QAM (Quadrature Amplitude Modulation, Quadrature Amplitude Modulation) is generally used to transmit data, and the logging data is modulated into a sine wave downhole and then transmitted to the ground system for demodulation to solve long-distance transmission. Problems that distort data. However, the problem with QAM is that at high temperature, the heating of each electronic component will cause obvious nonlinear imbalance, which will add a lot of noise to the carrier signal, so that the modulated wave will be distorted when it is sent out, and in the process of ultra-long-distance transmission. , the thermal noise in the cable and the harmonics generated by parasitic capacitance will be superimposed on the transmission signal, so that the amplitude of the signal received by the ground system will change greatly, and it is difficult to feed back the actual downhole information; in addition, QAM transmission requires high power and high The fundamental wave is provided by the frequency signal source, which greatly increases the power consumption of the logging tool and reduces the effective working time of the logging tool. In the embodiment of the present invention, a square wave is used for transmission, and its advantage is that the power required for square wave transmission is small and the signal noise is low. The main power consumption event occurs in the processing link of the square wave signal in the ground system. The power consumption of well tools can be reduced, and the waste heat generated by the operation of power devices can be reduced, thereby significantly prolonging the working time of a single well logging tool; in addition, the shape of a square wave is not easy for a high-frequency sine wave during long-distance transmission. Large changes occur, and the amplitude is relatively stable, which also provides convenient conditions for subsequent processing of logging data.

It should be noted that the logging tools in the prior art are divided into storage tools and wireline logging tools, that is, tools that can be stored in the storage unit of the downhole itself and transmit data to the ground by cables. Logging tools using different modes adopt two different time-depth acquisition modes, and the acquisition time-depth files are not shared. Therefore, when the logging data in the two modes are played back and transferred out of the curve in the surface system, usually Different modes are used for processing, which makes it impossible for a logging tool to simultaneously implement the storage mode and the wireline logging mode, that is, it is impossible to store the logging data in its own storage unit and transmit the logging data to the ground at the same time system.

In view of the problem that the acquisition time of the storage mode does not match the acquisition time of the wireline logging mode when the logging instrument 40 works in the storage mode and the wireline logging mode, a preset matching algorithm is used in the embodiment of the present application to Match the acquisition time of the storage working mode and the wireline logging working mode. Exemplarily, the preset matching algorithm can use a time-depth matching algorithm. When the logging instrument works in the storage working mode and the wireline logging working mode at the same time, the The time and depth of the storage working mode shall prevail. Before the data of the logging instrument 40 are uploaded to the surface system 10 through the telemetry communication sub-section 30, a time and depth correction will be performed to update the time and depth data in the wireline logging working mode. Solve the compatibility problem of time and depth in storage working mode and wireline logging working mode.

In the embodiment of the present invention, by adopting the above-mentioned dual-mode working structure of the storage working mode and the wireline logging working mode, it is beneficial to carry out logging in the two modes of cable transmission and storage at the same time, achieving both Wireline logging can obtain the working status of downhole tools and formation status in real time, and it can also have the advantages of strong stability, good accuracy and high success rate of storage logging in extremely harsh logging environments.

This application solves the problem of data loss in the process of downhole measurement in the prior art by realizing the function of simultaneously storing the logging data collected by the logging instrument in its own storage unit and transmitting it to the ground system for storage through the communication cable. Then only the time cost and the technical problem of increased logging cost caused by secondary logging can only be performed, and the technical effect of improving logging stability and success rate is realized.

Optionally, the surface system 10 is also configured to process the received logging data in a preset transmission format by using the maximum likelihood method.

Specifically, for the problem of low signal processing speed in the ground system 10, the embodiment of the present invention adopts the maximum likelihood method as a solution for processing logging data in a preset transmission format. For example, the preset transmission format is Square wave as an example:

First, the surface system 10 will send a learning command to command the downhole logging tool 40 to generate a high-level positive signal (“+1”) and a negative signal (“-1”), and transmit the positive and negative signals through the communication cable 20 to the ground system 10 for the ground system 10 to learn. In long-distance transmission, due to the loss of ultra-long-distance transmission, the digital level will be seriously deformed and become two curves approximately positively skewed, but it can still be calculated by the maximum likelihood method to calculate the most probable The positions of the original "+1" and "-1" levels are compared with the standard levels "+1" and "-1" on the ground system 10, so that the timing of the stored data in the ground system 10 can be compared with The alignment of the signal sequences transmitted by the communication cable 20 completes the learning process of the ground system 10 for the downhole transmission model, and pre-calculates various possible data sets (such as several sets of All types of waveform shapes generated after ultra-long-distance transmission of digital signals).

Then, the subsequent square wave signal with well logging data transmitted through the communication cable 20 will also produce the same loss model curve due to the same ultra-long-distance transmission as the previous signal used for learning. Since the time sequence of data stored in the surface system 10 has been aligned with the downhole logging data during the learning process, the time sequence of subsequent downhole signals is also aligned with the waveform template of the surface system 10, and it is compared with various waveform templates. Subtraction operation, there must be a waveform template that can complete the pattern matching with the waveform of this data set, so that the result of the subtraction between the two is low level (“0”), and the original digital signal of this data set template is stored In the ground system 10, the bands that are set to low level after the subtraction are cut out, and then the processing of the next segment of the curve is performed. Through simulation verification, in order to meet the above functions, the capacity of a data set that takes into account both signal processing confidence and transmission speed is 3.

In the embodiment of the present invention, by using the maximum likelihood method for learning, and using the learning results to process the logging data accordingly, it can perform square wave data transmission for the same communication cable whose length change is not significant relative to the total transmission length , use the pre-generated template waveform to align the time, and then compare the grouping with the template waveform, and convert the deformed square wave information into digital signals one by one like a movie projection film. The communication speed is extremely fast, and the logging is uploaded to the ground system The data communication speed can reach 4M bit/s (@9km depth) and 2M bit/s (@13km depth), which is significantly improved compared to the traditional transmission method.

At the same time, due to the use of the maximum likelihood method, a large amount of logging data can be transmitted to the well and processed in a short period of time, which greatly shortens the necessary time for the logging instrument to operate downhole, thereby significantly improving the success of a single logging operation rates and data reliability. In addition, for tools that require high-precision multi-probes, such as micro-resistivity imaging logging tools, because the algorithm can transmit a large amount of data to the ground system in a short time, it can be compatible with more dense acquisition probes and larger transmission data volumes. , so that the surface system can obtain more detailed downhole detection data, which is conducive to improving the design resolution index of the instrument and greatly improving the measurement capability of the instrument.

Fig. 2 is a structural diagram of another logging device provided by an embodiment of the present invention.

Optionally, as shown in FIG. 2 , the storage unit 41 of the logging tool 40 includes a main storage subunit 411 and a backup storage subunit 412; the logging data collected by the logging tool 40 are simultaneously stored in the main storage subunit 411 and the backup storage subunit 412. In the backup storage subunit 412.

Optionally, as shown in Figure 2, the logging instrument 40 also includes a logging unit 42, a power supply unit 43, and a communication unit 44; the logging unit 42 is used to collect logging data; The storage unit 41 and the logging unit 42 are powered; the communication unit 44 is used to realize the communication connection between the logging tool 40 and the telemetry communication sub-section 30 .

Optionally, as shown in Figure 2, the power supply unit 43 includes a main power supply subunit 431 and a backup power supply subunit 432; the main power supply subunit 431 is used to supply power to the communication unit 44, the storage unit 41, and the logging unit 42; the backup power supply The subunit 432 is used to assist in powering the communication unit 44 , the storage unit 41 and the logging unit 42 when the power of the main power supply subunit 431 is insufficient.

Optionally, as shown in FIG. 2 , the logging tool 40 also includes a storage configuration book 45, which is used to initialize the storage unit 41 in the logging tool 40 on the surface, and is also used to 40 reads the logging data in the storage unit 41 after the data collection is completed.

Specifically, the storage configuration book 45 is connected to the storage unit 41 in the logging instrument 40 through the USB configuration line 451, and the logging instrument 40 completes the main storage subunit 411 and the backup storage subunit 412 through the storage configuration book 45 before going downhole. initialization, the storage mode starts, the logging unit 42 starts to work, and the logging tool 40 enters the working state. After going downhole, the logging unit 42 measures various downhole data and stores them in the main storage subunit 411 and the backup storage subunit 412 at the same time. The communication unit 44 continuously decouples the information flow transmitted from the telemetry communication sub-section 30, and judges the communication enabling status of the ground system 10. ), the communication unit 44 makes the logging instrument enter the wireline logging working mode, and runs simultaneously with the storage working mode, and passes the logging data in the main storage subunit 411 through the plug structure 50 (that is, the upper connector shown in Fig. 2 501 and the lower connector 502) are uploaded to the telemetry communication short section 30. This working state continues until the communication unit 44 detects that the enabling signal is turned off (that is, the above-mentioned command to stop the wireline logging communication), then the communication unit 44 stops uploading logging data to the telemetry communication sub-section 30, and exits the wireline logging working mode. Continue to run only storage work mode.

Wherein, the main power supply subunit 431 supplies power for the communication unit 44, the main storage subunit 411, the backup storage subunit 412 and the logging unit 42 independently. The power supply subunit 432 starts to supply power to the above units as an auxiliary power supply.

It should be noted that both the main power supply subunit 431 and the backup power supply subunit 432 only supply power to the logging tool 40 where they are located, and do not provide power to other adjacent logging tools 40 or telemetry communication sub-units 30 . After the well logging is finished, after the logging instruments 40 are put into the well and disassembled two by two, the reading and shutdown of the logging data of the main storage subunit 411 and the backup storage subunit 412 are completed through the storage setting book 45, and the read out The well logging data is imported into the surface system 10, and the well logging data obtained when the well logging instrument 40 is in the downhole storage mode can be obtained.

In the embodiment of the present invention, by adopting the logging instrument with dual power supply and dual storage, when reading the logging data, it is found that the main storage subunit fails to save the complete logging data, and the backup storage can also be read. Well logging data in subunits, reducing the risk of logging failure due to failure of a single storage unit. The dual power supply only provides power for the logging instrument where it is located, and the backup power supply subunit is used to provide power when the voltage of the main power supply subunit is insufficient, which ensures that the backup power supply can be used when the main power supply subunit is exhausted and cannot supply power normally. The subunit can still make the logging tool work normally.

Optionally, as shown in Figure 2, the telemetry communication sub-section 30 includes a storage module 31, a power supply module 32, and a communication module 33; The well logging communication command is sent to the well logging instrument 40, and is also used to receive the well logging data transmitted by all the well logging instruments 40 in parallel, store the well logging data in the storage module 31, and simultaneously pass the communication cable 20 in a preset transmission format The logging data is transmitted to the surface system 10; the power supply module 32 is used to supply power to the storage module 31 and the communication module 33.

Specifically, the internal circuit system of the telemetry communication short joint 30 is composed of a storage module 31 , a power supply module 32 and a communication module 33 . The communication module 33 is used to receive an instruction from the surface system 10 to start the wireline logging communication, and forward it down to the communication unit 44 in the logging tool 40 that requires starting the wireline logging mode. When the logging tool 40 works in the wireline logging mode, the communication unit 44 in the logging tool 40 running in the wireline logging mode connected to the telemetry communication sub-section 30 will upload the logging data to the telemetry communication sub-section 30 The communication module 33 in. The communication module 33 parallelly processes the logging data uploaded by all the logging tools 40 in the wireline logging working mode, and stores them in the storage module 31 . Then, the logging data will be synchronously uploaded to the surface system 10 through the communication cable 20 in a preset transmission format. During this process, the power supply module 32 independently supplies power to the storage module 31 and the communication module 33 in the telemetry communication short joint 30 to ensure the normal operation of the telemetry communication short joint 30 .

Optionally, as shown in FIG. 2, the plugging structure 50 includes an upper joint 501 and a lower joint 502; the telemetry communication nipple 30 is connected to the upper joint 501 of the target logging tool through the lower joint 502, wherein the target logging tool It is a logging tool 40 directly connected with the telemetry communication sub-section 30 ; the lower joint 502 of the target logging tool is used to connect with the upper joint 501 of another logging tool 40 .

Specifically, the lower connector 502 of the telemetry communication nipple 30 is a plug structure. Compared with the upper connector 501 of the socket structure of the logging tool 40, the core wires between the two are defined as one-to-one correspondence and mirror symmetry. After the lower connector 502 of the communication nipple 30 is plugged in one-to-one with the upper connector 501 of the logging tool 40, commands can be sent and received between adjacent tools, as well as inter-tool communication transmission can be realized. Similarly, the definition of core wires between the upper joint 501 of the socket structure of the logging instrument 40 and the lower joint 502 of the plug structure is also one-to-one correspondence, which is conducive to the free combination connection or disassembly of the logging instrument 40, so that According to the needs, the logging tools 40 with corresponding functions can be freely combined to perform logging operations. In addition, after the logging instrument 40 is plugged and connected using the plug structure 50, the shell of the logging instrument 40 needs to be installed together through an anti-rotation block, a key structure, and a threaded ring structure to prevent grouting and fracture at the connection. vicious accident.

The embodiment of the present invention also provides a data acquisition method of a logging device. FIG. 3 is a flow chart of a data acquisition method of a logging device provided by an embodiment of the present invention. The data acquisition method of the logging device is applied to the above-mentioned The logging device in any embodiment, as shown in Figure 3, the data acquisition method specifically includes the following steps:

S301, the ground system sends an instruction to start the cable logging communication to the telemetry communication sub-section through the communication cable;

S302, the telemetry communication sub-section will start the wireline logging communication command and send it to the logging instrument;

S303, the well logging instrument collects well logging data, stores the well logging data in its own storage unit, and simultaneously transmits the well logging data to the telemetry communication sub-section based on the command to start the cable logging communication;

S304, the telemetry communication sub-section receives and stores the well logging data, and at the same time transmits the well logging data to the surface system through the communication cable in a preset transmission format.

Specifically, before the logging instruments go downhole to perform measurements, each logging instrument will start the storage mode, the telemetry communication sub is connected to the ground system through the communication cable, and the ground system sends the start cable logging to the telemetry communication sub through the communication cable. The communication command makes the logging tool enter the wireline logging working mode. At this time, the storage working mode will not be interrupted, and the logging tool will work in the two working modes at the same time. Exit the wireline logging work mode, and only work in the storage work mode. After the logging tool goes into the well and enters into the cable logging working mode based on the command to start the cable logging communication issued by the telemetry communication sub 30, the logging data will be collected. On the one hand, the logging tool will store the logging The number of wells is stored in its own storage unit. On the other hand, the logging tool will transmit the logging data to the telemetry communication sub in the wireline logging mode, so that the telemetry communication sub can transmit Logging data is transmitted to surface systems.

The data acquisition method of the logging device provided by the embodiment of the present invention has the same technical features as the logging device provided by the above embodiment, so it can also solve the same technical problem and achieve the same technical effect.

An embodiment of the present invention also provides a logging system, which includes the logging device in any of the above embodiments.

The logging system provided by the embodiment of the present invention includes the logging device in the above-mentioned embodiment, so the logging system provided by the embodiment of the present invention also has the beneficial effects described in the above-mentioned embodiment, which will not be repeated here.

In the description of the embodiments of the present invention, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Finally, it should be noted that the above are only preferred embodiments and applied technical principles of the present invention. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. A well logging device, characterized in that, the well logging device comprises a surface system, a communication cable, a telemetry communication nipple and at least one logging instrument provided with a storage unit: The ground system is connected to the telemetry communication sub-section through the communication cable, and the telemetry communication sub-section is connected to the logging tool through a plug-in structure; The ground system sends an instruction to enable cable logging communication to the telemetry communication sub-section through the communication cable; The well logging instrument is used to collect well logging data, store the well logging data in its own storage unit, and simultaneously transmit the well logging data to the telemetry communication sub-section based on the command to start the cable logging communication. well data; The telemetry communication sub-section receives and stores the logging data, and at the same time transmits the logging data to the surface system through the communication cable in a preset transmission format. 2 . The well logging device according to claim 1 , wherein the surface system is further configured to process the received well logging data in the preset transmission format by using a maximum likelihood method. 3 . 3. The well logging device according to claim 1, wherein the storage unit of the well logging instrument comprises a main storage subunit and a backup storage subunit; The logging data collected by the logging tool is stored in the main storage subunit and the backup storage subunit at the same time. 4. The well logging device according to claim 3, wherein the well logging instrument further comprises a well logging unit, a power supply unit and a communication unit; The logging unit is used to collect the logging data; The power supply unit is used to supply power to the communication unit, the storage unit, and the logging unit; The communication unit is used to realize the communication connection between the logging instrument and the telemetry communication sub-section. 5. The logging device according to claim 4, wherein the power supply unit comprises a main power supply subunit and a backup power supply subunit; The main power subunit is used to supply power to the communication unit, the storage unit, and the logging unit; The backup power supply subunit is used to assist in supplying power to the communication unit, the storage unit and the logging unit when the power of the main power supply subunit is insufficient. 6. The well logging device according to claim 1, characterized in that, the well logging instrument further comprises a storage configuration book, and the storage configuration book is used to reset the storage unit in the well logging instrument on the ground The initialization is also used to read the logging data in the storage unit after the logging tool completes the data acquisition. 7. The well logging device according to claim 1, characterized in that, the telemetry communication sub-joint comprises a storage module, a power supply module and a communication module; The communication module is used to receive the start wireline logging communication command sent by the surface system, and send the start wireline logging communication command to the logging tool, and is also used to receive all the logging tools in parallel. The logging data transmitted by the well tool, storing the logging data in the storage module, and simultaneously transmitting the logging data to the surface system in the preset transmission format through the communication cable ; The power supply module is used to supply power to the storage module and the communication module. 8. The logging device according to claim 1, characterized in that, the plug-in structure comprises an upper joint and a lower joint; The telemetry communication sub-section is connected to the upper sub-joint of the target logging tool through the lower joint, wherein the target logging tool is the logging tool directly connected to the telemetry communication sub-section; The lower joint of the target logging tool is used to connect with the upper joint of another logging tool. 9. A data acquisition method for a logging device, characterized in that the data acquisition method is applied to the logging device according to any one of claims 1-8, and the data acquisition method comprises: The ground system sends an instruction to start the cable logging communication to the telemetry communication sub through the communication cable; The telemetry communication sub-section sends the command to start the wireline logging communication to the logging instrument; The well logging instrument collects well logging data, stores the well logging data in its own storage unit, and simultaneously transmits the well logging data to the telemetry communication sub-section based on the command to start the cable logging communication; The telemetry communication sub-section receives and stores the logging data, and at the same time transmits the logging data to the surface system through the communication cable in a preset transmission format. 10. A well logging system, characterized in that the well logging system comprises the well logging device according to any one of claims 1-8.