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Polymer having surface activity function, and preparation method and application thereof

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 Effects of ionic power, increased sweep volume, and increased hydrodynamic volume

Active Publication Date: 2017-10-03
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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  • Polymer having surface activity function, and preparation method and application thereof
  • Polymer having surface activity function, and preparation method and application thereof
  • Polymer having surface activity function, and preparation method and application thereof

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preparation example Construction

[0038] second aspect , the present invention provides a kind of preparation method of polymer with surface active function, the method comprises: in the presence of initiator and water as solvent, make monomer D, monomer E and monomer F carry out solution polymerization reaction , wherein the monomer D is a monomer with the structure shown in formula (4), the monomer E is a monomer with the structure shown in formula (5), and the monomer F is a monomer with the structure shown in formula (6) The monomer of the shown structure, wherein the amount of the monomer D, the monomer E and the monomer F is such that the content of the structural unit A in the prepared polymer is 50-89.99% by weight, and the content of the structural unit B is 10% -40% by weight, the content of structural unit C is 0.01-10% 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 uni...

specific Embodiment approach

[0061] According to a preferred specific embodiment, the preparation method of the polymer with surface active function comprises the following steps:

[0062] Step 1: Add monomer D, monomer E and monomer F into the polymerization reaction bottle to prepare an aqueous solution, and adjust the pH value of the aqueous solution with alkali to 6-10;

[0063] Step 2: Add chelating agent, urea aqueous solution, tetramethylethylenediamine and defoamer to the aqueous solution in the first step, and stir evenly;

[0064] Step 3: At 0-30°C, nitrogen is bubbled for 5-60min, then the initiator is added to the aqueous solution in the second step, and after nitrogen is bubbled to make it evenly mixed, the polymer is obtained by sealing and polymerizing for 2-15h colloid;

[0065] Step 4: Take out the colloid, add granular alkali after granulation, make it evenly mixed, and hydrolyze it at 80-90°C for 2-3h;

[0066] Step 5: Take out the colloidal particles and then carry out granulation, d...

Embodiment 1

[0078] 1. Combine 15.8g of acrylamide (79% by weight of the total monomer), 4.0g of 2-acrylamido-2-methylpropanesulfonic acid (20% by weight of the total monomer) and 0.2g of formula The functional monomer shown in (16) (m=7, n=4, R 7 for SO 3 H, accounting for 1% by weight of the total amount of monomers) was added to the thermal insulation polymerization reaction bottle (ie the polymerization bottle), 60.0 g of deionized water was added to dissolve it into an aqueous solution, and sodium hydroxide was added to adjust the pH to 6.0;

[0079] 2. Add 1.0 g of 1 wt % EDTA-2Na aqueous solution, 0.5 g of 1 wt % aqueous urea solution, 10.0 mg of tetramethylethylenediamine, and 15.0 mg of dimethylpolysiloxane (defoamer), and stir well ;

[0080] 3. Control the temperature of the aqueous solution at 10° C. After 30 minutes of nitrogen purge, add 2.0 g of a 0.1 wt % potassium persulfate aqueous solution and 1.0 g of a 0.1 wt % sodium bisulfite aqueous solution to initiate the reacti...

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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, thereby improving the aging resistance of the polymer; 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 a preparation method and application thereof. 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, so that its solution has good surface activity. Generally, an oxidation-reduction composite initiation system is used. The polyacrylamide and the surface active monomer are initiated to copolymerize under the temperature to obtain the surface active functional polymer. [0003] Surface-active functional polymers are very different from conventional polymer surfactants. The properties of polymer surfactants are more inclined to small molecule surface activity, while surface active functional polymers mainly exhibit the properties of polymers. The relative molecular weight of polymer surfactants is not hig...

Claims

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Application Information

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Patent Type & Authority Applications(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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