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Fracturing fluid thickening agent and fracturing fluid containing the same

A fracturing fluid thickener and modification technology, applied in the fields of polysaccharide thickener, fracturing fluid thickener, and fracturing fluid, can solve the problem of lack of vegetable gum fracturing thickener and other problems

Inactive Publication Date: 2012-06-13
CHINA GASOLINEEUM & CHEM KUSN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the field lacks a vegetable gum fracturing thickener that is instant and has strong viscosity-increasing ability, temperature resistance, salt resistance, shear resistance and low residue

Method used

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  • Fracturing fluid thickening agent and fracturing fluid containing the same
  • Fracturing fluid thickening agent and fracturing fluid containing the same
  • Fracturing fluid thickening agent and fracturing fluid containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] The thickener of the present invention and its production process are described below with regard to specific examples of implementation.

[0090] Case 1:

[0091] Put 100 kg of hydroxypropyl guar gum in 600-700 liters of isopropanol, pass N 2 For 30 minutes, under low temperature conditions, add 32 kg of 20% sodium hydroxide solution dropwise, and after stirring for 30 minutes, add 35 kg of 75% sodium chloroacetate dropwise, heat up to 75°C, stir for 180 minutes, and use citric acid or acetic acid Neutralization, filtration, washing, drying, crushing, and finished products. Properties see properties examples.

[0092] Case 2:

[0093] Put 100 kg carboxymethyl hydroxypropyl guar gum in 600-700 liters of isopropanol, pass N 2 30 minutes, under the low temperature situation, dropwise add 32 kilograms of 20% sodium hydroxide solution, after stirring and maturing for 30 minutes, add dropwise 60 kilograms of 25% sodium chloroethylsulfonate, be warming up to 80 ℃, stir an...

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PUM

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Abstract

The invention provides a fracturing fluid thickening agent, prepared by modifying galactomannan compounds with ion etherification under alkaline conditions, wherein the ion etherification substitution degree is 0.01-0.45. The invention also provides a fracturing fluid containing the thickening agent. The thickening agent used for vegetable gelatin fracturing is instant, and has the advantages of strong tackifying capability, temperature tolerance, salt resistance, anti-shearing performance, and low residue amount.

Description

technical field [0001] The invention relates to a thickener, in particular to a fracturing fluid thickener and a fracturing fluid containing the thickener. More specifically, the present invention relates to a low-residue, instant fracturing fluid thickener for low-permeability oil and gas formations, especially a polysaccharide thickener that can quickly disperse and dissolve within 30 minutes with a gel-breaking residue of less than 80 mg / L , and the production method of the thickener. Background technique [0002] As we all know, hydraulic fracturing is a technical measure used to improve the production capacity of low-permeability oil and gas reservoirs. The fracturing fluid used in fracturing must have the characteristics of high viscosity, high shear resistance, high sand-carrying performance, and environmental protection of gel breaking and low residue. The high viscosity allows it to create cracks and make the cracks reach the desired width and depth. Among them, ...

Claims

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Application Information

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IPC IPC(8): C08B37/00C09K8/68
Inventor 邓明宇何建平彭树华孙雪莲周利英宋建锋何俊尹恒叶应庆吴志明陆辉陈卫平
Owner CHINA GASOLINEEUM & CHEM KUSN
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