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A three-in-one composite control and flooding process for oilfield deep control and flooding

A three-in-one, deep-seated technology, applied in the direction of drilling composition, wellbore/well components, production fluid, etc., can solve the problems of inability to migrate, unsatisfactory oil displacement effect, etc., and achieve simple and convenient operation, strong solution Heterogeneity problem, effect of improving sweep coefficient

Active Publication Date: 2015-10-28
DONGYING SHENGSHI PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the particles are injected into the ground, they cannot migrate and can only be blocked near the wellbore, and the oil displacement effect is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In the first step, the liquid polymer microsphere solution is prepared with reinjection water or formation water. The mass concentration of the liquid polymer microsphere solution is 1%, and the dosage is 80 cubic meters;

[0031] The second step is to prepare a mass concentration of 0.5% petroleum sulfonate solution with reinjection water or formation water, and the treatment capacity is 50 cubic meters;

[0032] The third step is to prepare a dual-liquid method profile control agent with reinjection water or formation water. The dual-liquid method profile control agent is composed of two liquids, one of which is a quaternary ammonium salt type cationic surfactant. The concentration is 0.5%, and the processing capacity is 400 cubic meters; the other liquid is anionic emulsion polymer, and the mass concentration is 0.5%, and the processing capacity is 400 cubic meters;

[0033] Step 4: Inject liquid polymer microsphere solution, three-purpose oil displacing agent soluti...

Embodiment 2

[0045] In the first step, the liquid polymer microsphere solution is prepared with reinjection water or formation water, the use mass concentration of the liquid polymer microsphere solution is 2%, and the processing capacity is 100 cubic meters;

[0046] In the second step, use reinjection water or formation water to prepare a plug-removing and oil-displacing agent solution with a mass concentration of 0.5% APP, and the treatment capacity is 80 cubic meters;

[0047] The third step is to prepare a dual-liquid method profile control agent with reinjection water or formation water. The dual-liquid method profile control agent is composed of two liquids, one of which is a quaternary ammonium salt type cationic surfactant. The concentration is 0.5%, and the processing capacity is 400 cubic meters; the other liquid is anionic emulsion polymer, and the mass concentration is 0.5%, and the processing capacity is 400 cubic meters;

[0048]Step 4: Inject liquid polymer microsphere solu...

Embodiment 3

[0060] In the first step, the liquid polymer microsphere solution is prepared with reinjection water or formation water, the mass concentration of the liquid polymer microsphere solution is 2.5%, and the processing capacity is 200 cubic meters;

[0061] In the second step, use reinjection water or formation water to prepare a solution with a mass concentration of 1% APP plugging and oil displacement agent, and the treatment capacity is 120 cubic meters;

[0062] The third step is to prepare a dual-liquid method profile control agent with reinjection water or formation water. The dual-liquid method profile control agent is composed of two liquids, one of which is a quaternary ammonium salt type cationic surfactant. The concentration is 0.5%, and the processing capacity is 600 cubic meters; the other liquid is anionic emulsion polymer, and the mass concentration is 0.5%, and the processing capacity is 600 cubic meters;

[0063] Step 4: Inject liquid polymer microsphere solution,...

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PUM

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Abstract

Disclosed is a three-in-one composite profile control and displacement process used for oilfield deep profile control. The process includes that injecting a prepared liquid polymer microsphere solution, then injecting a three-adoption oil displacing agent solution, and finally injecting two-fluid process profile control agent, wherein liquid polymer microspheres selectively enter strata, expand when encountering water and play a role in deep sealing, the oil displacing agent can facilitate expansion of the liquid polymer microspheres and can play a role in oil displacement, and the two-fluid process profile control technology plays a role in sealing and improving profile control strength. Through combining of three products, deep profile control and sweeping area increase can be realized, and crude oil recovery efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of oil field production, in particular to a three-in-one composite control and drive technology for oil field deep control and drive. Background technique [0002] At present, my country's oilfields have gradually entered the middle and late stages of water flooding oil recovery. The difficulty of mining and the low degree of recovery have created enormous pressure on oilfield production, energy consumption, and crude oil refining. How to further improve the volumetric sweep coefficient of injected water and the displacement efficiency within the water sweeping volume, and economically and effectively exploit existing oil fields is one of the major issues to be solved urgently in the petroleum industry. During oil production, reservoir heterogeneity is an important factor controlling the flow and distribution of reservoir fluids in porous media. The improvement of the sweep coefficient of water flooding and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22E21B33/13C09K8/42C09K8/58
Inventor 蒋华义陈军斌王俊奇屈展盖海防魏辰
Owner DONGYING SHENGSHI PETROLEUM TECH CO LTD
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