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Water-based fracturing fluid thickening agent with high shear resistance

A water-based fracturing and shear-resistant technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of unsatisfactory shear resistance of thickeners and unsatisfactory shear resistance enhancement of thickeners and other problems, to achieve the effect of no residue, high shear resistance and good solubility

Inactive Publication Date: 2018-03-27
CHENGDU KESHENG PETROLEUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the shear resistance of the thickener is not ideal, and the purpose is to provide a water-based fracturing fluid thickener with high shear resistance, so as to solve the problem of the unsatisfactory shear resistance of the thickener

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The water-based fracturing fluid thickener with high shear resistance of the present invention comprises the following components: alkylacrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonate sodium, undecylenic acid, Dimethyldiallyl ammonium chloride, dodecafluoroheptyl methacrylate, vinylpyrrolidone, octadecyl acrylate, complexing agent, initiator. The complexing agent is disodium edetate. The initiator is a compound mixed solution of ammonium persulfate and sodium bisulfite, and the mass ratio of ammonium persulfate and sodium bisulfite is 1:1.

[0019] The invention does not need to be purified before the reaction, and the polymerization is initiated at a suitable temperature and initiator by adding a complexing agent, and the preparation process is simple; the thickener of the invention can replace the vegetable gum and its Derivatives, and has the advantages of shear resistance, no residue, and simple preparation process. The thickener has good solubilit...

Embodiment 2

[0021] A water-based fracturing fluid thickener with high shear resistance, comprising the following components in parts by weight: 10-30 parts of alkylacrylamide, 1-3 parts of acrylic acid, 60-80 parts of 2-acrylamide- Sodium 2-methylpropanesulfonate, 2-3 parts undecylenic acid, 10-15 parts dimethyl diallyl ammonium chloride, 5-10 parts dodecafluoroheptyl methacrylate, 8-15 parts Vinyl pyrrolidone, 3-8 parts of octadecyl acrylate, 1.2-1.5 parts of complexing agent, 0.1-1 part of initiator. The complexing agent is disodium edetate. The initiator is a compound mixed solution of ammonium persulfate and sodium bisulfite, and the mass ratio of ammonium persulfate and sodium bisulfite is 1:1.

Embodiment 3

[0023] A water-based fracturing fluid thickener with high shear resistance, comprising the following components in parts by weight: 25 parts of alkylacrylamide, 2 parts of acrylic acid, 75 parts of 2-acrylamido-2-methylpropanesulfonate Namonate, 2.5 parts of undecylenic acid, 13 parts of dimethyl diallyl ammonium chloride, 8 parts of dodecafluoroheptyl methacrylate, 12 parts of vinylpyrrolidone, 5 parts of octadecyl acrylate, 1.4 parts of Mixture, 0.8 parts of initiator. The present invention optimizes the proportioning of each component. The complexing agent is disodium edetate. The initiator is a compound mixed solution of ammonium persulfate and sodium bisulfite, and the mass ratio of ammonium persulfate and sodium bisulfite is 1:1. The present invention has optimized optimal proportioning. It is prepared as an aqueous solution with a mass fraction of 0.5%, and at 170S-1, 230°C, shearing continuously for 30 minutes, the viscosity retention rate is above 80%.

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Abstract

The invention discloses a water-based fracturing fluid thickening agent with high shear resistance, which is prepared from the following components: alkyl acrylamide, acrylic acid, sodium 2-(acryloylamino)-2-methylpropane-1-sulfonate, undecylenic acid, dimethyl diallyl ammonium chloride, dodecafluoroheptyl methacrylate, vinyl pyrrolidone, octadecyl acrylate, a complexing agent and an initiator. The water-based fracturing fluid thickening agent with high shear resistance provided by the invention has good solubleness and higher shear resistance.

Description

technical field [0001] The invention relates to a thickener, in particular to a water-based fracturing fluid thickener with high shear resistance. Background technique [0002] Fracturing technology is a common oil and gas stimulation technology, and its purpose is to press oil and gas layers out of fractures, thereby increasing production. Currently used fracturing fluids are mainly divided into water-based fracturing fluids, oil-based fracturing fluids, alcohol-based fracturing fluids, and foam fracturing fluids. Due to the advantages of low cost and good performance, water-based fracturing fluids are widely used in China. are widely used outside. The fracturing fluid must have the characteristics of high viscosity, high shear resistance, high sand-carrying capacity, and environmental protection without residue. [0003] The currently used thickener raw materials mainly include vegetable gum and its derivatives, cellulose derivatives, biopolysaccharides, and synthetic po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C08F220/58C08F220/54C08F220/06C08F220/64C08F226/02C08F220/24C08F226/10C08F220/18
CPCC08F220/58C08F220/585C09K8/685C08F220/54C08F220/06C08F220/64C08F226/02C08F220/24C08F226/10C08F220/1818
Inventor 贺昶明
Owner CHENGDU KESHENG PETROLEUM TECH
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