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Clear water-sewage mixed profile control agent

A profile control agent and pollution cleaning technology, which is applied in wellbore/well components, drilling composition, earthwork drilling and production, etc., can solve the problem of stable production and recovery of oil wells, huge impact on water injection effect, prone to water channeling, Prevent water flooding and other problems, achieve the effects of preventing water channeling, good water plugging and profile control performance, and improving water absorption profile

Inactive Publication Date: 2016-04-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the fractures produced by fracturing have a great impact on the water injection effect, and water channeling and water flooding are prone to occur along the fracture direction. If they cannot be effectively treated, the oil displacement efficiency will continue to decline, and the stable production and recovery of oil wells will decline.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment provides a pollution cleaning compound profile control agent. It includes water-based plugging agent, solid phase particles, polyacrylamide, crosslinking agent and regulator, wherein, the content of each component is by mass, water-based plugging agent: solid phase particles: polyacrylamide: crosslinking agent: regulator Agent=7:0.7:0.5:1.5:0.15.

[0022] The water-based blocking agent is composed of anionic polyacrylamide and cationic polyacrylamide, in molar ratio, anionic polyacrylamide: cationic polyacrylamide = 10:1; the solid phase particles are rosin powder and / or rubber; The crosslinking agent is water-soluble organic phenolic resin; the regulator is oxalic acid.

[0023] The gel profile control agent of the pollution cleaning compound profile control agent in this embodiment is obtained by mixing water-based plugging control agent, solid phase particles, polyacrylamide, cross-linking agent and regulator.

[0024] Test the plugging ability of t...

Embodiment 2

[0030] This embodiment provides a pollution cleaning mixed profile control agent, which includes water-based plugging control agent, solid phase particles, polyacrylamide, cross-linking agent and regulator, wherein, the amount of each component is by mass, and the water-based plugging control agent : solid phase particles: polyacrylamide: crosslinking agent: modifier = 8: 0.8: 0.2: 1.3: 0.1.

[0031] The water-based blocking agent is composed of anionic polyacrylamide and cationic polyacrylamide, in molar ratio, anionic polyacrylamide: cationic polyacrylamide = 10:1; the solid phase particles are rosin powder and / or rubber; The crosslinking agent is water-soluble organic phenolic resin; the regulator is oxalic acid.

[0032] The gel profile control agent of the pollution cleaning compound profile control agent in this embodiment is obtained by mixing water-based plugging control agent, solid phase particles, polyacrylamide, cross-linking agent and regulator.

[0033] The poll...

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PUM

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Abstract

The invention provides a clear water-sewage mixed profile control agent. The clear water-sewage mixed profile control agent comprises a water-based profile control and water shutoff, solid particles, polyacrylamide, a cross-linking agent and a conditioning agent in a mass ratio of (5-10):(0.5-1.0):(0.1-0.5):(1.0-2.0):(0.1-0.2). The invention also provides the application of the clear water-sewage mixed profile control agent. The clear water-sewage mixed profile control agent provided by the invention has good water shut-off and profile control performance, can improve the water injection profiles of water injection wells, prevents unreasonable water channeling along fracture direction and flooding, and realizes efficient and high efficiency water injection, thereby reaching the purposes of improving the reservoir use degree and oil displacement efficiency.

Description

technical field [0001] The invention relates to a pollution-cleaning mixed profile control agent, which belongs to the technical field of auxiliary agents for oilfield exploitation. Background technique [0002] As most of the country's oilfields enter the late stage of high water-cut development, the comprehensive water content of oilfields continues to increase, and the average water content of oil wells has reached more than 80% at present, and many new problems are faced in water plugging and profile control. Plugging adjustment is becoming more and more difficult. The traditional classic method of using polyacrylamide for water plugging is limited in its application because of its poor temperature and salt resistance, easy degradation, and damage to formations and oil layers to varying degrees. In the current research, through the research of polyacrylamide series profile control agents with various cross-linking systems, the performance can be improved and better field...

Claims

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Application Information

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IPC IPC(8): C09K8/512E21B33/13
Inventor 詹良李作臣王群郭明刚蔡佳荣邓春郁闻素玲李晖韩柏东徐滨
Owner PETROCHINA CO LTD
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