Surface active polymer, preparation method thereof and application of surface active polymer as polymer oil-displacing agent

A surface-active, polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as oil displacement and oil washing capacity needs to be further improved, reduce the investment in on-site injection equipment and facilities, and improve crude oil The effect of oil recovery rate and oil production cost reduction

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the oil displacement and oil washing capabilities of current surface active polymers need to be further improved

Method used

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  • Surface active polymer, preparation method thereof and application of surface active polymer as polymer oil-displacing agent
  • Surface active polymer, preparation method thereof and application of surface active polymer as polymer oil-displacing agent
  • Surface active polymer, preparation method thereof and application of surface active polymer as polymer oil-displacing agent

Examples

Experimental program
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preparation example Construction

[0040] As mentioned above, the second aspect of the present invention provides a method for preparing a surface-active polymer, the method comprising: under solution polymerization conditions, in the presence of an initiator, a monomer mixture is polymerized in water, and the monomer mixture is polymerized in water. The bulk mixture contains monomer X, monomer Y and acrylamide, the monomer X is a monomer having the structure shown in formula (5), and the monomer Y is a monomer having the structure shown in formula (6); And based on the total amount of the monomer mixture, the content of the acrylamide is 65-99% by weight, the content of the monomer X is 0.5-25% by weight, and the content of the monomer Y is 0.5-15% by weight %;

[0041]

[0042] Among them, m is 1-8, n is 1-9, p1 and p2 are each independently 1-6; M 3 are alkali metals and / or H.

[0043] Preferably, based on the total amount of the monomer mixture, the content of the acrylamide is 74-96 wt %, the content ...

preparation example 1

[0085] 100mL of tetrahydrofuran was added to a 250mL there-necked flask, placed in a salt water bath at -10°C, and 0.1mol of terephthalene (that is, p-divinylbenzene, the same below) was added under stirring, and then 0.1mol of SO 3 , after the reaction is complete, add 0.1 mol of Grignard reagent of p-ethylbenzyl magnesium chloride dropwise, keep the reaction for 1 h after the dropwise addition, then add n-hexane to precipitate the product, and finally wash with n-hexane for more than three times. The product obtained by the nuclear magnetic test is the monomer X (m=1, n=2) having the structure represented by formula (5).

preparation example 2

[0087] 100mL of tetrahydrofuran was added to a 250mL three-necked flask, placed in a salt water bath at -10°C, and 0.1mol of terephthalene and 0.1mol of sodium chloromethanesulfonate were added under stirring (purchased from Bailingwei Technology Co., Ltd.) , then add 0.2g of boron trichloride as a catalyst, an addition reaction occurs, and after the reaction is complete, 0.1mol of Grignard reagent of p-hexylbenzyl magnesium chloride is added dropwise, and cuprous chloride is used as a catalyst. Incubate the reaction for another 1h, then add n-hexane to precipitate the product, and finally wash with n-hexane for more than three times. The product obtained by the nuclear magnetic test is confirmed to be the monomer X (m=2, n=6) with the structure shown in formula (5). ).

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Abstract

The invention relates to the field of petrochemical engineering, and particularly discloses a surface active polymer and a preparation method thereof and application of the surface active polymer as a polymer oil-displacing agent.The polymer contains a structural unit A, a structural unit B and a structural unit C. The structural unit A is a structural unit with a structure shown in a formula (1) and/or a formula (2), and the structural unit B is a structural unit with a structure shown in a formula (3). The structural unit B is a structural unit with a structure as shown in a formula (3), and the structural unit C is a structural unit with a structure as shown in a formula (4); wherein m is 1-8, n is 1-9, p1 and p2 are respectively and independently 1-6, and M1 and M2 are respectively and independently alkali metal. On the basis of excellent temperature resistance and salt tolerance, the polymer disclosed by the invention also has excellent tackifying property and emulsifying property, surface and interface tension is reduced, and the polymer has good oil displacement and oil washing capabilities.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular, to a surface active polymer and its preparation method and application as a polymer oil-displacing agent. Background technique [0002] Chemical flooding is the most direct and effective technical means to enhance oil recovery in tertiary oil recovery technology. Chemical flooding mainly includes surfactant flooding, polymer flooding, binary or ternary composite flooding, and foam flooding. The industrial application of chemical flooding has been formed in my country's Daqing Oilfield, Shengli Oilfield and Henan Oilfield, and significant economic benefits have been achieved. [0003] The field application results show that the chromatographic separation phenomenon will occur in the process of binary or ternary composite flooding in the process of reservoir porous media migration, which seriously affects the performance of the composite flooding. Surfactants have the ability ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F212/32C08F226/02C08F8/12C09K8/584C09K8/60
CPCC08F220/56C08F8/12C09K8/584C09K8/604C08F212/32C08F226/02
Inventor 赵方园杨捷王晓春伊卓
Owner CHINA PETROLEUM & CHEM CORP
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