RU2369726C1 - Method of oil deposit development - Google Patents

Abstract

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil industry and can be implemented at development of oil deposit. The essence of the invention is as follows: at development of oil deposit working agent is pumped via pressure wells; oil is withdrawn via producing wells; there is carried out control over state of producing wells. Producing wells fed from one electric power source are united into a pattern of holes. Total amount of consumed electric power is determined when all producing wells operate in the pattern of holes. Each producing well is alternately shut off in a chosen pattern of holes; amount of consumed electric power is determined for the rest operating producing wells. During operation of producing wells continuous control is carried out for consumption of electric power by producing wells of the given pattern of holes. When amount of consumed electric power in the pattern of holes changes, this change is revealed, there is determined the well a shut off of which leads to the specified amount of consumed power; measures are taken to find causes for shutting off the producing well and to eliminate them; further the well is put into operation; new amount of consumed power is registered and accepted instead of the former value.

EFFECT: operative detection of temporarily shut-in producing wells.

1 ex

Description

The invention relates to the oil industry and may find application in the development of oil deposits.

There is a known method of developing an oil deposit at a late stage, including the allocation from the entire stock of injection wells drilled into the deposits with a decrease in their injectivity of at least 70% of the initial injectivity and / or production wells with a water cut of the oil produced in them of at least 80%. Carry out an alternate shutdown of these wells from work. The reaction of operating production wells is monitored by the quantity and / or rate and watering and / or aeration of the extracted oil to shut down each of the selected wells from operation. Allocate zones of the response to the shutdown of selected wells from operation. Subsequent stimulation of operating production wells in the allocated zones is carried out by successive explosions in the allocated wells. The explosions are carried out in wells adjacent to the contour of the selected zones. The explosions are carried out directed with the localization of their energy in the zone of the reservoir (RF Patent No. 2221137, published. 2004.01.10).

The known method does not allow to trace the shutdown of a producing well and to promptly take measures to eliminate downtime of producing wells.

Closest to the proposed invention in technical essence is a method of developing an oil field, including drilling wells, monitoring the energy state of the reservoir and each well, pumping water into injection wells, and taking oil from production wells. Monitoring the energy state is carried out by calculating the current reservoir pressure for the reservoir as a whole and for each well (Application for invention of the Russian Federation No. 2002118443, published. 2004.01.20 - prototype).

The disadvantage of this method is the difficulty of performing operational control over the operation of the producing well at the current reservoir pressure.

The proposed invention solves the problem of quickly identifying idle production wells.

The problem is solved in that in the method of developing an oil reservoir, which includes injecting a working agent through injection wells, selecting products through production wells and monitoring the state of production wells, according to the invention, production wells fed from one electric power source are combined into a group for all operating production wells the wells in the group determine the total amount of electricity consumed, in the allocated group, each production well is stopped in turn and the quantities are determined about the energy consumed by the remaining production wells during operation, during operation of the production wells, the amount of electricity consumed by the production wells of this group is constantly monitored, when the energy consumption in the group of wells changes, the changed amount of energy consumed is detected, a well is installed, the shutdown of which leads to the achievement of the set amount of energy consumed , carry out measures to establish the cause of the shutdown of the identified production well and eliminate these reasons and run well in the job.

The features of the invention are:

1. injection of a working agent through injection wells;

2. selection of products through production wells;

3. monitoring the state of production wells;

4. Association in a group of production wells powered from a single source of electricity;

5. with all working production wells in the group, determining the total amount of electricity consumed;

6. in the selected group, holding an alternate shutdown of each production well and determining the amount of electricity consumed by the remaining production wells in operation;

7. during the operation of production wells, continuous monitoring of the amount of electricity consumed by production wells of this group;

8. when changing the energy consumed in the group of wells, identifying the changed amount of energy consumed;

9. the establishment of a well, the shutdown of which leads to the achievement of a specified amount of energy consumed;

10. the implementation of measures to establish the reasons for the shutdown of the identified producing well, the elimination of these causes and the launch of the well into operation.

Signs 1-3 are common with the prototype, signs 4-10 are the salient features of the invention.

SUMMARY OF THE INVENTION

When developing an oil field, it is very difficult to register a shutdown of a producing well. Visual observations of the operation of the wells require periodic attendance at the wells by service personnel, and the reaction to shutting down the formation pressure well is very slow. The proposed invention solves the problem of quickly identifying idle production wells, creating the prerequisites for reducing downtime of wells and increasing, thereby, oil production. The problem is solved as follows.

When developing an oil deposit, the working agent is injected through injection wells, production is taken through production wells and the state of production wells is monitored. Production wells, powered from a single source of electricity, are combined into a group. During the work of all producing wells in the group, the total amount of electricity consumed is determined. In the selected group, each production well is shut down in turn and the amount of electricity consumed by the remaining production wells in operation is determined. During the operation of production wells, constant monitoring of the amount of electricity consumed by production wells of this group is carried out. When changing the consumed energy in the group of wells, a changed amount of consumed energy is detected, a well is installed, the shutdown of which leads to the achievement of the set amount of consumed energy, measures are taken to establish the cause of the shutdown of the identified producing well and eliminate these causes, and the well is put into operation. The amount of energy consumed by the well launched into operation is determined after eliminating the reasons for its shutdown, the new amount of energy consumed is fixed and taken into account instead of the previous value for this well.

Concrete example

An oil reservoir is developed with the following characteristics: depth 1100 m, reservoir pressure 10 MPa, reservoir temperature 24 ° C, porosity 0.12, permeability 0.002 μm ² , oil saturation 0.8, direction of natural fracture 310 °, oil viscosity 28 MPa · s, oil density 920 kg / m ³ , carbonate reservoir fractured-pore-cavernous. The working agent is pumped through injection wells, oil is taken through production wells. 10 production wells, powered from a single source of electricity, are combined into a group. During the operation of all producing wells in the group, the total amount of electricity consumed is determined, which is 215 kW. In the selected group, each production well is shut down in turn and the amount of electricity consumed by the remaining production wells remaining in operation is determined. Wells consume respectively 1 - 10.8, 2 - 40.3, 3 - 27.1, 4 - 22.8, 5 - 16.2, 6 - 25.1, 7 - 15.3, 8 - 12.7 , 9 - 32.4, 10 - 13.2 kW. During the operation of production wells, constant monitoring of the amount of electricity consumed by production wells of this group is carried out. It is determined that there has been a decrease in the total amount of energy consumed in the group of wells by 16.2 kW. It is established that such power consumption corresponds to well 5. Perform measures to establish the reason for stopping well 5 and to eliminate these causes and start well 5 to work. The amount of energy consumed by the well 5 is determined after eliminating the reasons for its shutdown, the new amount of energy consumed is fixed and taken into account instead of the previous value for this well. In this case, the amount of electricity consumed remains the same.

As a result, it was possible to reduce the downtime of production wells by 10% and, accordingly, increase oil production.

The application of the proposed method will solve the problem of the operational identification of idle production wells.

Claims (1)

A method of developing an oil reservoir, including injecting a working agent through injection wells, selecting products through production wells and monitoring the state of production wells, characterized in that the production wells fed from a single source of electricity are combined into a group, with all operating production wells in the group being determined the total amount of electricity consumed, in the allocated group, each production well is stopped in turn and the amount of electricity consumed is determined the remaining production wells, while the production wells are operating, they constantly monitor the amount of electricity consumed by the production wells of this group, when the energy consumption in the group of wells changes, the changed amount of energy consumed is detected, a well is installed, the shutdown of which leads to the achievement of the set amount of consumed energy, perform measures to establish the cause of the shutdown of the identified producing well and eliminate these causes and launch importance in the work, fix the new amount of energy consumed and take it into account instead of the previous value.