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A kind of polymer with surface active function and its preparation method and application

A technology of surface activity and polymer, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem that oil displacement polymers cannot meet the requirements of medium and low permeability reservoir development, and achieve enhanced resistance to divalent metals Ionic ability, good viscosity-increasing effect, effect of improving surface activity

Active Publication Date: 2019-07-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymer flooding technology has been developed in China for nearly 30 years, but due to the problem of injectability, conventional high molecular weight oil flooding polymers cannot meet the development requirements of medium and low permeability reservoirs. The study of the surface active functional polymer oil displacement agent is of great significance

Method used

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  • A kind of polymer with surface active function and its preparation method and application
  • A kind of polymer with surface active function and its preparation method and application
  • A kind of polymer with surface active function and its preparation method and application

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preparation example Construction

[0037] second aspect , the invention provides a kind of preparation method of the polymer with surface active function, this method comprises: in the presence of initiator and the water as solvent, make monomer D, monomer E and monomer F carry out solution polymerization reaction , wherein, the monomer D is a monomer having a structure shown in formula (4), the monomer E is a monomer having a structure shown in formula (5), and the monomer F is a monomer having a structure shown in formula (6) The monomer of the shown structure, wherein, the consumption of described monomer D, monomer E and monomer F makes the content of structural unit A in the prepared polymer be 55-89.9% by weight, the content of structural unit B is 10 -40% by weight, the content of structural unit C is 0.1-5% by weight, and the viscosity-average molecular weight of the prepared polymer is 22 million-32 million; the structural unit A has the structure shown in formula (1) Structural unit, said structural...

specific Embodiment approach

[0059] According to a preferred embodiment, the preparation method of the polymer with surface active function comprises the following steps:

[0060] Step 1: adding monomer D, monomer E and monomer F into a polymerization reaction bottle to prepare an aqueous solution, and adjusting the pH value of the aqueous solution to 6-10 with alkali;

[0061] Step 2: Add chelating agent, urea aqueous solution, tetramethylethylenediamine and defoamer to the aqueous solution of step 1, and stir evenly;

[0062] Step 3: After bubbling nitrogen gas for 5-60 minutes at a temperature of 0-30°C, add an initiator to the aqueous solution in step 2, and after bubbling nitrogen gas to make it evenly mixed, seal polymerization for 2-15 hours to obtain a polymer colloid;

[0063] Step 4: Take out the colloid, add granular alkali after granulation, make it evenly mixed, and then hydrolyze at 80-90°C for 2-3 hours;

[0064] Step 5: Take out the colloidal particles and then granulate, dry, pulverize ...

Embodiment 1

[0076] 1. 15.8g acrylamide (accounting for 79% by weight of the total amount of monomers), 4.0g of 2-acrylamido-2-methylpropanesulfonic acid (accounting for 20% by weight of the total amount of monomers) and 0.2g formula The functional monomer (m=12, n=6, R shown in (15) 7 for SO 3 H, accounting for 1% by weight of the total amount of monomers) was added to the heat-insulating polymerization reaction bottle (ie, the polymerization bottle), and 60.0 g of deionized water was added to dissolve to form an aqueous solution, and then sodium hydroxide was added to adjust the pH value to 6.0;

[0077] 2. Add 1.0 g of 1% by weight EDTA-2Na aqueous solution, 0.5 g of 1% by weight urea aqueous solution, 10.0 mg of tetramethylethylenediamine, and 15.0 mg of dimethyl polysiloxane (defoamer), and stir well ;

[0078] 3. Control the temperature of the aqueous solution at 10°C. After 30 minutes of blowing nitrogen to drive oxygen, add 2.0 g of 0.1 wt % potassium persulfate aqueous solution ...

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Abstract

The invention relates to the field of crude oil recovery, and discloses a polymer having a surface activity function, and a preparation method and application thereof. The polymer contains a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is a structural unit having a structure shown in Formula (1); the structural unit B is a structural unit having a structure shown in Formula (2); and the structural unit C is a structural unit having a structure shown in Formula (3). According to the invention, a polymerizable monomer having surface activity is introduced onto a macromolecular chain, and the ether chain structure determines that the synthesized copolymer has high hydrolysis resistance and thermal stability; and meanwhile, the surface tension and interfacial tension of the polymer solution are greatly reduced, so that the polymer has favorable surface activity and fine compatibilization, emulsification and oil washing capabilities, thereby improving the crude oil recovery factor. The Formula (1), the Formula (2) and the Formula (3) are shown in the specification.

Description

technical field [0001] The invention relates to the field of crude oil recovery, in particular to a polymer with surface active function and its preparation method and application. Background technique [0002] Surface active functional polymer refers to a new type of functional polymer that has both hydrophilic groups and lipophilic groups in its polymer structure, making its solution have good surface activity. Generally, an oxidation-reduction composite initiation system is used. The copolymerization of polyacrylamide and surface active monomer is initiated under high temperature to obtain surface active functional polymer. [0003] Surface-active functional polymers are very different from conventional high-molecular surfactants. The properties of polymer surfactants are more inclined to the surface activity of small molecules, while the surface active functional polymers mainly exhibit the properties of polymers. The relative molecular mass of polymer surfactants is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F212/14C08F290/06C08F2/10C09K8/584
CPCC08F2/10C08F220/56C08F290/062C09K8/584C08F220/585C08F212/14
Inventor 赵方园杨捷于芳王晓春
Owner CHINA PETROLEUM & CHEM CORP
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