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Heat resistance and salt tolerance polymer for oil displacement and preparation method thereof

A temperature-resistant, salt-resistant, polymer technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems that HPAM is not suitable for high-temperature and high-salt reservoirs, so as to improve oil displacement efficiency, stability, The effect of improving viscoelasticity

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shows that HPAM is not suitable for high temperature and high salinity reservoirs

Method used

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  • Heat resistance and salt tolerance polymer for oil displacement and preparation method thereof
  • Heat resistance and salt tolerance polymer for oil displacement and preparation method thereof
  • Heat resistance and salt tolerance polymer for oil displacement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 12.0g of acrylamide, 7.0g of 2-acrylamido-2-methylpropanesulfonic acid and 1.0g of the functional monomer represented by general formula VIII (n=0) into the polymerization reaction bottle, add deionized water 50.0 g was dissolved, then sodium hydroxide was added to adjust the pH to 7.1, and then 1.0 g of 1% EDTA-2Na aqueous solution and 0.5 g of 1% urea aqueous solution were sequentially added.

[0034] Put the polymerization reaction bottle in a constant temperature water bath, blow nitrogen to drive oxygen for 30 minutes, then add 4.0g of 0.1% potassium persulfate aqueous solution and 2.0g of 0.1% potassium bisulfite aqueous solution, initiate the reaction at 0°C, and continue to pass nitrogen Stopped after five minutes, and after 4 hours of polymerization reaction, the temperature was raised to 50° C. to continue the reaction for 6 hours to obtain rubber blocks. The rubber block is taken out, cut, granulated, pulverized, and sieved to obtain a white temperature-r...

Embodiment 2

[0037] Add 9.5g of acrylamide, 10.0g of 2-acrylamido-2-methylpropanesulfonic acid and 0.5g of the functional monomer represented by general formula VIII (n=1) into the polymerization reaction bottle, add deionized water 50.0 g was dissolved, then sodium hydroxide was added to adjust the pH to 8.1, and then 1.0 g of 1% EDTA-2Na aqueous solution and 1.0 g of 1% urea aqueous solution were sequentially added.

[0038] Put the polymerization reaction bottle in a constant temperature water bath, blow nitrogen to drive oxygen for 30 minutes, add 5.0g of 0.1% ammonium persulfate aqueous solution and 2.0g of 0.1% potassium bisulfite aqueous solution, initiate the reaction at 0°C, and continue to pass nitrogen for five Stop after 10 minutes. After 6 hours of polymerization reaction, the temperature was raised to 50° C. and the reaction was continued for 6 hours to obtain rubber blocks. The rubber block is taken out, cut, granulated, pulverized, and sieved to obtain a white temperature-r...

Embodiment 3

[0041] Add 13.9g of acrylamide, 6.0g of 2-acrylamido-2-methylpropanesulfonic acid and 0.1g of the functional monomer represented by the general formula VIII (n=2) into the polymerization reaction bottle, add deionized water 50.0 g was dissolved, then sodium hydroxide was added to adjust the pH to 9.5, and then 2.0 g of 1% EDTA-2Na aqueous solution and 0.5 g of 1% urea aqueous solution were sequentially added.

[0042]Put the polymerization reaction bottle in a constant temperature water bath, blow nitrogen to drive oxygen for 30 minutes, add 10 g of 0.1% ammonium persulfate aqueous solution and 5.0 g of 0.1% sodium bisulfite aqueous solution, initiate the reaction at 0°C, and continue to pass nitrogen for five minutes After 8 hours of polymerization, the temperature was raised to 50° C. and the reaction was continued for 5 hours to obtain rubber blocks. The rubber block is taken out, cut, granulated, pulverized, and sieved to obtain a white temperature-resistant and salt-resis...

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Abstract

The invention provides a heat resistance and salt tolerance polymer for oil displacement and a preparation method thereof. A heat resistance and salt tolerance functional monomer is introduced into an acrylamide copolymer, so that the heat resistance and salt tolerance of the polyacrylamide are improved; due to the introduction of the functional monomer, the stability of the polymer can be improved in long-term use, the entanglement capacity of the molecular chain of the polymer is maintained, the viscoelasticity of the polymer is improved, and the oil displacement efficiency is improved.

Description

technical field [0001] The invention relates to a polymer and a preparation method thereof, in particular to an acrylamide polymer for temperature-resistant and salt-resistant oil flooding and a preparation method thereof. Background technique [0002] In recent years, with the continuous deepening of my country's oilfield development, the water content in the produced fluid has gradually increased, and the comprehensive water content of some oil fields has even reached more than 90%. In order to further enhance oil recovery, tertiary oil recovery technologies such as polymer flooding, binary compound flooding (alkali-polymer), and triple compound flooding (alkali-surfactant-polymer) have been successively implemented in Daqing, Liaohe, Dagang, Shengli and other main oilfields in the east have been widely used, and have achieved significant effects of increasing oil and reducing water and good economic and social benefits. The polymer flooding technology uses the means of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/06C08F226/10C08F220/54C08F220/56C08F4/40C09K8/588
Inventor 赵方园刘希伊卓林蔚然祝纶宇张文龙
Owner CHINA PETROLEUM & CHEM CORP
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