Heat-resisting interpenetrating polymer network plural gel profile control agent and preparation method thereof

An interpenetrating network and composite gel technology, which is applied in the field of high temperature resistant interpenetrating network composite gel profile control agent and its preparation, can solve the problems of unfavorable oil field operation injection, uneven mixing of working fluid, short polymerization reaction time, etc. , to achieve significant social and economic efficiency, make up for the uncontrolled gelation time, and the effect of long gelation time

Inactive Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-liquid method has complicated procedures and high cost, and it is prone to uneven mixing of the two working liquids during on-site construction.
[0006] At present, there are still some deficiencies in the preparation of silicate profile control systems with water glass as the main agent; for example, the Chinese invention application with application number 201410727978.8 discloses a water glass profile control agent and its preparation method. The time is too short, which is not conducive to oil field operation and injection
The invention application patent with application number 200410029654.3 discloses an inorganic delayed silicic acid gel profile control agent, in which the amount of water glass used is 5%-15%, and the content of the main agent is as high as 15%. Excessive dosage will greatly increase the cost; The plugging rate of the gelling system is too low, the pH value of the system after gelling is 10-12, and the alkalinity is too high, which will cause too much damage to the reservoir, and it is easy to cause damage to the skin of the liquid preparation personnel during on-site preparation

Method used

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  • Heat-resisting interpenetrating polymer network plural gel profile control agent and preparation method thereof

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preparation example Construction

[0041] The preparation method of the high temperature resistant interpenetrating network composite gel profile control agent of the present invention comprises the following steps:

[0042] (1) Mix water glass, auxiliary agent I, auxiliary agent II and water at normal temperature and pressure;

[0043] (2) Add the solution prepared in step (1) to the polymer, and after stirring evenly, add the solution of crosslinking agent I and crosslinking agent II;

[0044] (3) Put the reaction solution in step (2) at high temperature to carry out polymerization reaction for 28-72h.

[0045] In one embodiment of the present invention, stirring is carried out for 30-90 minutes in step (2).

[0046] In one embodiment of the present invention, in step (3), the temperature is 80°C-120°C.

[0047] In the present invention, unless otherwise stated, the operation is carried out at normal temperature and pressure.

[0048] In the present invention, unless otherwise stated, all parts and percent...

Embodiment 1

[0056] Mix 3g of sodium silicate, 1g of sodium bentonite, 1g of silicate, and 100g of water at normal temperature and pressure, then add 0.1g of polymer hydrolyzed polyacrylamide to the prepared solution, stir for 45 minutes, and then add 1g of methyl acetate ester, 0.1 g of phenolic resin cross-linking agent solution, and the reaction solution was placed at a temperature of 90° C. for 68 hours of polymerization.

Embodiment 2

[0060] Mix 8g of sodium silicate, 1g of sodium bentonite, 1g of silicate and 100g of water at normal temperature and pressure, then add 0.1g of polymer hydrolyzed polyacrylamide to the prepared solution, stir for 45 minutes, and then add 1g of methyl acetate ester, 0.1 g of phenolic resin cross-linking agent solution, and the reaction solution was polymerized at 90° C. for 50 h.

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Abstract

The invention discloses a heat-resisting interpenetrating polymer network plural gel profile control agent. The heat-resisting interpenetrating polymer network plural gel profile control agent is characterized by being composed of the following components including (a) sodium silicate, (b) cross-linking agent which is a hydrolysable ester compound, (c) cross-linking agent which is selected from compounds of phenolic resin cross-linking agent, chromium lactic, aluminum citrate or zirconium citrate, (d) polymers which are selected from hydrolytic polyacrylamide, xanthan gum or cellulose, (e) additive I which is selected from sodium bentonite, calcium bentonite or nano silica, (f) additive II which is selected from diatomite or silicate, and (g) water. The invention also provides a preparation method of the heat-resisting interpenetrating polymer network plural gel profile control agent.

Description

technical field [0001] The invention relates to a high temperature resistant interpenetrating network composite gel profile control agent and a preparation method thereof. Background technique [0002] In recent years, most oilfields in my country have adopted the water injection development method to supplement the underground deficit caused by the extraction of crude oil, and at the same time maintain or increase the pressure of the oil layer to achieve stable and high production of crude oil. In the process of water injection development, due to long-term erosion of the formation by injected water, the heterogeneity of the sand body in the plane and vertical direction will increase, which will inevitably cause the injected water to rush in the direction of the production well in the horizontal plane and in the direction of high permeability in the vertical direction. phenomenon, making the affected volume smaller. [0003] In order to improve the water absorption profile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512
CPCC09K8/512
Inventor 王涛王昊杨圣贤刘巍肖建洪唐培忠朱妍婷韦雪史树彬衣哲
Owner CHINA PETROLEUM & CHEM CORP
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