Production increase method for increasing single-well productivity of oil well

A technology for single well productivity and oil wells, which is applied in wellbore/well components, chemical instruments and methods, earthwork drilling and production, etc., and can solve problems such as poor single well productivity

Inactive Publication Date: 2018-03-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The above methods are not effective in improving single well productivi...

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  • Production increase method for increasing single-well productivity of oil well

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Embodiment Construction

[0015] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0016] Such as figure 1 as shown, figure 1 It is a flow chart of the production stimulation method for improving single well productivity of the present invention.

[0017] Step 101, selecting suitable low-yield oil wells. The well is a single well with poor development of water drive reservoirs, an oil well with high pour point oil or high viscosity heavy oil that is difficult to develop, and an oil well with highly sensitive reservoirs.

[0018] Step 102, injecting a system capable of forming microemulsions into the low-yield oil well and increasing the energy of the low-yield oil well. Inject a high-concentration surfactant-based system into the well to form a microemulsion with the crude oil in the reservoir in situ, and the injection volume is ...

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Abstract

The invention provides a production increase method for increasing the single-well productivity of an oil well. The production increase method for increasing the single-well productivity of the oil well comprises the steps that 1, the suitable low-productivity oil well is selected; 2, a system capable of forming microemulsion is injected into the low-productivity oil well, and energization is conducted on the low-productivity oil well; 3, the low-productivity oil well is subjected to a well closing reaction, the reaction of an injected fluid and crude oil is met, and it is ensured that after sufficiently reacting, the crude oil in a reservoir stratum is dissolved into the injected microemulsion system and an energization system at the maximum quantity; and 4, well opening for production isconducted. According to the production increase method for increasing the single-well productivity of the oil well, through the microemulsion and an oil layer protection assistant, an oil flow channel can be dredged, damage is removed, the production increase purpose is achieved, the stripping extent of the crude oil can be greatly increased, effective flowing of the oil of the single-well controlled reserve volume is increased in an auxiliary energization mode, and thus the single-well yield is increased.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a method for increasing production of a single oil well. Background technique [0002] Oilfield development is mainly produced by water flooding and polymer flooding, but there are many low-yield and low-efficiency oil wells in oilfield development. A class of low-permeability and ultra-low-permeability water flooding reservoir development units have the problems of difficult water injection and untimely energy replenishment, resulting in low single well productivity and poor development efficiency, which affects the oil production rate of the entire development unit; the class has high pour point characteristics In the development process of oil reservoirs, electric heating or other auxiliary heating methods are generally used to ensure the fluidity of crude oil in production, which results in high energy consumption and poor development economic benefits; a class ...

Claims

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Application Information

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IPC IPC(8): E21B43/22E21B43/16C09K8/584C09K8/588
CPCE21B43/16C09K8/584C09K8/588E21B43/164E21B43/166
Inventor 汪庐山李强刘希明陈利霞卢占国张君陈勇张磊朱建军宋菲杨景辉党娟华
Owner CHINA PETROLEUM & CHEM CORP
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