Amphiphilic block T-shaped copolymer and preparation method thereof

An amphiphilic block and polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as low salt resistance and poor oil displacement effect

Active Publication Date: 2014-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that when polyacrylamide in the prior art is used for oil displacement in high-temperature and high-salt reservoirs, it has low salt resistance and poor oil displacement. The problem of poor effect, and then provide an amphiphilic block T-type Polymer and its preparation method

Method used

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  • Amphiphilic block T-shaped copolymer and preparation method thereof
  • Amphiphilic block T-shaped copolymer and preparation method thereof
  • Amphiphilic block T-shaped copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dissolve 105.0g of acrylamide and 7.5g of 2-acrylamido-2-methylpropanesulfonic acid in 850g of water, and mix well to obtain a mixed solution;

[0039] (2) Adjust the pH value of the mixed solution in the step (1) to 7, and pass nitrogen protection into the mixed solution;

[0040] (3) Mix 0.2 g of sodium lauryl sulfate and 1.5 g of alkenylphenol polyoxyethylene ether to obtain a mixture solution, wherein m in the alkenylphenol polyoxyethylene ether 2 is 6, n 2 is 14;

[0041] (4) Add 0.08g of K 2 S 2 o 8 -NaHSO 3 The initiator is fully dissolved in water to obtain an aqueous solution of the initiator, wherein the K 2 S 2 o 8 with NaHSO 3 The mass ratio is 3:1;

[0042] (5) At 45°C, slowly add the mixture solution in step (3) and the aqueous initiator solution in step (4) dropwise to the mixed solution treated in step (2), and stir Evenly, continue to pass inert gas until the mixed solution does not contain oxygen;

[0043] (6) React the mixed solution t...

Embodiment 2

[0046] (1) Dissolve 97.8g of acrylamide and 10.0g of 2-acrylamido-2-methylpropanesulfonic acid in 950.0g of water, and mix well to obtain a mixed solution;

[0047] (2) Adjust the pH value of the mixed solution in the step (1) to 8, and pass nitrogen protection into the mixed solution;

[0048] (3) Mix 0.45g of sodium dodecylbenzenesulfonate and 0.5g of alkenylphenol polyoxyethylene ether to obtain a mixture solution, wherein m in the alkenylphenol polyoxyethylene ether 2 is 7, n 2 is 12;

[0049] (4) Add 0.1g of K 2 S 2 o 8 -NaHSO 3 The initiator is fully dissolved in water to obtain an aqueous solution of the initiator, wherein the K 2 S 2 o 8 with NaHSO 3 The mass ratio is 3:1;

[0050] (5) At 45°C, slowly add the mixture solution in step (3) and the aqueous initiator solution in step (4) dropwise to the mixed solution treated in step (2), and stir Evenly, continue to feed nitrogen until the mixed solution does not contain oxygen;

[0051] (6) React the mixed so...

Embodiment 3

[0054] (1) Dissolve 105.0g of acrylamide and 7.5g of 2-acrylamido-2-methylpropanesulfonic acid in 850.0g of water, and mix well to obtain a mixed solution;

[0055] (2) Adjust the pH value of the mixed solution in the step (1) to 7, and pass nitrogen protection into the mixed solution;

[0056] (3) Mix 0.2 g of sodium lauryl sulfate and 1.5 g of alkenylphenol polyoxyethylene ether to obtain a mixture solution, wherein m in the alkenylphenol polyoxyethylene ether 2 is 8, n 2 is 14;

[0057] (4) Add 0.08g of K 2 S 2 o 8 -NaHSO 3 The initiator is fully dissolved in water to obtain an aqueous solution of the initiator, wherein the K 2 S 2 o 8 with NaHSO 3 The mass ratio is 3:1;

[0058] (5) At 45°C, slowly add the mixture solution in step (3) and the aqueous initiator solution in step (4) dropwise to the mixed solution treated in step (2), and stir Evenly, continue to feed nitrogen until the mixed solution does not contain oxygen;

[0059] (6) React the mixed solution ...

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Abstract

The invention provides an amphiphilic block T-shaped copolymer and a preparation method thereof, belonging to the field of petroleum exploitation technology. The amphiphilic block T-shaped copolymer comprises at least one block (A) taking acrylamide as a monomeric unit, at least one block (B)at least one block (A) taking alkylphenol polyoxyethylene ether as a monomeric unit, and at least one block (C) taking 2-acrylamide-2-methylpropanesulfonic acid as a monomeric unit. When being adopted as an oil displacement agent, the amphiphilic block T-shaped copolymer is less influenced by outside metal ions, and has excellent salt resistance, a T-shaped structure can form a reversible supermolecule aggregation network structure with intermolecule association, so that the temperature resistance and salt resistance properties of the polymer can be effectively enhanced.

Description

technical field [0001] The invention relates to an amphiphilic block T-type polymer and a preparation method thereof, and belongs to the technical field of petroleum exploitation. Background technique [0002] At present, the exploitation of most major oilfields in my country has entered the late stage, and the existing water injection technology can no longer meet the needs of oilfield development. Polymer flooding has become an important means of improving oil recovery in my country's oilfields. A lot of research has been done with polymers. At present, the polymer used for oil displacement is mainly ultra-high molecular weight partially hydrolyzed polyacrylamide (HPAM), which is a linear structure polymer obtained by homopolymerization of acrylamide or copolymerization of acrylamide and acrylic acid, followed by hydrolysis. [0003] However, because HPAM is easily hydrolyzed under high temperature conditions, the apparent viscosity of HPAM is greatly affected by temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/56C08F220/58C09K8/588
Inventor 王增林田玉芹汪云家朱荣娇吴伟李健康陈雷杜立滨仇东旭安申法张小卫宋岱峰
Owner CHINA PETROLEUM & CHEM CORP
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