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Amphiphobic fracturing fluid thickening agent with self-repairing function and preparation method thereof

A fracturing fluid thickener and amphiphobic technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large shearing effect, high salinity effect, and poor temperature and salt resistance and other problems, to achieve good mechanical shearing and formation shearing, good solubility effect

Active Publication Date: 2022-02-11
山东蓝湾新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current fracturing fluid thickeners have defects such as being greatly affected by high temperature and high salinity, being greatly affected by shearing, poor temperature and salt resistance, and poor shear resistance.

Method used

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  • Amphiphobic fracturing fluid thickening agent with self-repairing function and preparation method thereof

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preparation example Construction

[0039] In a second aspect, the present invention provides a method for preparing the amphobic fracturing fluid thickener with self-repairing function described in the first aspect of the present invention, the method comprising the steps of:

[0040] (1) Dissolving vinylpyrrolidone, anionic monomer solution, hydrophobic group-containing monomer and alcohol polymer with water to obtain a mixed solution, then adding sulfonic acid group-containing oligomers to the mixed solution and mixing evenly to obtain solution to be polymerized;

[0041] (2) Nitrogen and oxygen are passed through the solution to be polymerized, and then a polymerization assistant is added to initiate a polymerization reaction to prepare an amphobic fracturing fluid thickener with self-repairing function.

[0042] According to some preferred embodiments, before step (2), the pH of the solution to be polymerized obtained in step (1) is first adjusted to 6-8; in the present invention, for adjusting the pH of th...

Embodiment 1

[0059] An amphobic fracturing fluid thickener with self-healing function, prepared from the following components in parts by weight:

[0060] 603 parts of deionized water, 10 parts of vinylpyrrolidone, 75 parts of anionic monomer solution 1#, 2 parts of N,N-diethylaminoethyl acrylate, 150 parts of sulfonic acid-containing oligomer A, 150 parts of polyethylene Glycol-4000 and 0.055 parts of polymerization aids (0.05 parts of aminotriacetic acid, 0.002 parts of peracetic acid, 0.003 parts of sodium sulfite).

[0061] A preparation method of an amphobic fracturing fluid thickener with self-repairing function comprises the steps:

[0062] ①Add 603 parts of deionized water into the reaction kettle, add 10 parts of vinylpyrrolidone, 75 parts of anionic monomer solution 1#, 2 parts of N,N-diethylaminoethyl acrylate, 150 parts of poly Ethylene glycol-4000, after completely dissolving, add 150 parts of oligomer A containing sulfonic acid groups, and stir thoroughly to obtain a uniform...

Embodiment 2

[0066] An amphobic fracturing fluid thickener with self-healing function, prepared from the following components in parts by weight:

[0067] 523 parts of deionized water, 17 parts of vinylpyrrolidone, 80 parts of anionic monomer solution 2#, 5 parts of diethylaminoethyl methacrylate, 200 parts of sulfonic acid-containing oligomer B, 175 parts of polyethylene glycol- 4000 and 0.113 parts of polymerization aids (0.1 part of diethylenetriaminepentaacetic acid, 0.005 part of peracetic acid, 0.008 part of sodium bisulfite).

[0068] A preparation method of an amphobic fracturing fluid thickener with self-repairing function comprises the steps:

[0069] ①Add 523 parts of deionized water into the reaction kettle, and then add 17 parts of vinylpyrrolidone, 80 parts of anionic monomer solution 2#, 5 parts of diethylaminoethyl methacrylate, 175 parts of polyethylene glycol under stirring conditions -4000, after completely dissolving, add 200 parts of sulfonic acid group-containing oli...

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Abstract

The invention relates to an amphiphobic fracturing fluid thickening agent with a self-repairing function and a preparation method thereof, and belongs to the technical field of petroleum. The fracturing fluid thickening agent is prepared from water, vinyl pyrrolidone, an anionic monomer solution, a hydrophobic group-containing monomer, a sulfonic group-containing oligomer, an alcohol polymer and a polymerization additive, wherein the anionic monomer solution is a neutralization solution of 2-acrylamido-2-methylpropanesulfonic acid and alkali; the hydrophobic group-containing monomer is N,N-diethylaminoethyl acrylate and / or diethylaminoethyl methacrylate; the sulfonic group-containing oligomer is a polymer of a sulfonic group-containing monomer and hexadecyl methyl diallyl ammonium chloride, and the sulfonic group-containing monomer is 2-acrylamido-2-methylpropanesulfonic acid and / or sodium p-styrenesulfonate. The fracturing fluid thickening agent disclosed by the invention has the characteristics of high viscosity, high dissolution speed, temperature resistance and salt resistance under the condition of high salinity, and has a self-repairing function within a short time after high-frequency shearing.

Description

technical field [0001] The invention relates to the field of petroleum technology, in particular to an additive for oilfields, in particular to an amphobic fracturing fluid thickener with self-repairing function and a preparation method thereof. Background technique [0002] In recent years, with the development of unconventional oil and gas reservoirs, fracturing has become an important means of oil and gas well stimulation and has been widely used in the field. For those oil and gas wells with low or no production at the initial stage of production, after fracturing and stimulation, they have certain production value and economic benefits. Fracturing fluid is used as the working fluid in the process of hydraulic fracturing to transform oil and gas reservoirs, and its performance directly affects the success or failure of fracturing operations and the effect of reservoir stimulation after fracturing. With the advancement of oil exploration technology, the development of oi...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F265/10C08F257/00C08F220/58C08F226/10C08F220/34C09K8/68C09K8/88
CPCC08F283/06C08F265/10C08F257/00C09K8/68C09K8/882C08F220/585C08F226/10C08F220/34
Inventor 李金江于朋朋许永升荣洪杰
Owner 山东蓝湾新材料有限公司
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