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Low-density gel particle modifying and flooding agent and preparation method thereof

A technology of gel particles and flooding agents, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of strength and aging performance decline, gel particle filler precipitation, and filler easy precipitation, etc., to achieve Maintain good strength, avoid easy precipitation, and maintain good aging resistance

Active Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-density gel particle control and displacement agent, so as to solve the problem that the filler is easy to separate out after the existing gel particle control and displacement agent absorbs water and swells
[0006] The second object of the present invention is to provide a method for preparing a low-density gel particle control agent, thereby solving the problem that the gel particles prepared by the existing method are prone to filler precipitation, resulting in a decrease in strength and aging performance

Method used

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  • Low-density gel particle modifying and flooding agent and preparation method thereof
  • Low-density gel particle modifying and flooding agent and preparation method thereof
  • Low-density gel particle modifying and flooding agent and preparation method thereof

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preparation example Construction

[0039] Embodiment 1 of the preparation method of the low-density gel particle control and displacement agent of the present invention, to prepare the gel particles involved in the low-density gel particle control and displacement agent embodiment 1, the following steps are adopted:

[0040] Dissolve acrylamide, sodium 2-acrylamido-2-methylpropanesulfonate, and N,N-methylenebisacrylamide in water, then add floating beads and γ-(2,3-epoxy Propoxy)propyltrimethoxysilane, stir well to obtain a suspension; at 25°C, add sodium bisulfite and ammonium persulfate, stir for 20min to form figure 1 The solid rubber block shown in (a) is placed under the condition of not lower than 20°C for 24 hours, then cut and granulated to obtain the low-density gel particle control and displacement agent. The cutting machine can be used for granulation. By adjusting the parameters, gel particles of different sizes can be formed. The particle size range is 1-10mm.

Embodiment 2

[0041] Embodiment 2 of the preparation method of the low-density gel particle regulating and displacing agent of the present invention, the gel particles involved in the low-density gel particle regulating and displacing agent embodiment 2, adopt the following steps:

[0042] Dissolve acrylamide, sodium 2-acrylamido-2-methylpropanesulfonate, and N,N-methylenebisacrylamide in water, then add hollow glass microspheres and methacryloxypropane under stirring base trimethoxysilane, stirred evenly to obtain a suspension; at 30°C, add sodium bisulfite and ammonium persulfate, and stir for 15 minutes to form figure 1 The solid gel block shown in (b) was placed at room temperature for 24 hours, then cut and granulated to obtain the low-density gel particle control and displacement agent.

[0043] Embodiment 3 of the preparation method of the low-density gel particle control and displacement agent of the present invention, to prepare the gel particles involved in the low-density gel par...

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Abstract

The invention relates to a low-density gel particle modifying and flooding agent and a preparation method thereof. The low-density gel particle modifying and flooding agent is prepared from the following raw materials in percentage by weight through polymerization: 15%-20% of acrylamide, 3%-5% of 2-acrylamido-2-methyl propane sulfonic acid sodium salt, 0.2%-0.5% of N,N-methylene bisacrylamide, 8%-17% of an inorganic light filler, 2%-6% of a silane coupling agent, 0.2%-1.0% of an initiator and the balance being water. The density of the gel particle modifying and flooding agent is smaller thanthat of injected water and is adjustable through the inorganic light filler, the inorganic light filler is connected with a main chain of the gel particle modifying and flooding agent through a chemical bond through the silane coupling agent, and the problems that after gel particles absorb water and expand, the filler is likely to be separated out, and the strength is reduced are solved.

Description

technical field [0001] The invention belongs to the field of gel particles for controlling and driving of oil reservoir water injection wells, and in particular relates to a low-density gel particle regulating and driving agent and a preparation method thereof. Background technique [0002] In the later stage of water flooding development of oilfields, the heterogeneity of reservoirs increases, and the efficiency of water flooding decreases. The control and flooding technology has become one of the key technologies to improve the effect of water flooding development. Gel particle control agent is a kind of super absorbent resin, which has certain elasticity, strength and water retention after absorbing water and swelling. During the preparation of the gel particle control agent, it is often necessary to improve the molecular structure and add fillers or reinforcing agents to meet the requirements of temperature resistance and mineralization resistance (such as temperature re...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/88C08F220/56C08F220/58C08F222/38
CPCC09K8/588C09K8/887C08F220/56
Inventor 马香丽陈传东黄鹂牛保伦曹敏薛永新宋红峰刘明霞
Owner CHINA PETROLEUM & CHEM CORP
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