A kind of fracturing fluid and preparation method thereof

A fracturing fluid and thickener technology, applied in the field of fracturing fluid, can solve the problems of poor temperature resistance and shear resistance, complex additive components, high residue content, etc., and achieve good temperature resistance and shear resistance, thickener The effect of small dosage and low residue content
CN106995690BActive Publication Date: 2019-10-25CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2019-10-25

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Abstract

The invention relates to a fracturing fluid, which includes a densifier I, a densifier II, a clay stabilizer, a bactericide, a pH conditioning agent, a cross-linking agent, a gel breaker and water, wherein the densifier I is nonionic polyacrylamide, and the densifier II is hydroxyethyl carboxymethyl cellulose. The invention further relates to a preparation method of the fracturing fluid. The preparation method includes: (1) during stirring, adding the densifier I and the densifier II to water, then adding the clay stabilizer, the bactericide, and the pH conditioning agent, performing uniform stirring to obtain an original glue solution, and performing standing for 3-5 h; and (2) adding the gel breaker, and then adding the cross-linking agent to obtain the fracturing fluid. The densifier I is nonionic polyacrylamide, and the densifier II is hydroxyethyl carboxymethyl cellulose. Since the fracturing fluid includes two densifiers of nonionic polyacrylamide and hydroxyethyl carboxymethyl cellulose, the fracturing fluid is small in densifier consumption, good in temperature-resistant shearing resistance, complete in gel breaking, low in residue content, cheap and available in raw materials, and low in cost.
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Description

technical field

[0001] The invention relates to a fracturing fluid and a preparation method of the fracturing fluid. Background technique

[0002] Fracturing is to use pressure to open the formation, form fractures and support it with proppant to reduce fluid flow resistance and increase production and injection measures. It is mainly used in low-permeability oil and gas reservoirs and carbonate oil and gas reservoirs. Water-based fracturing fluid is a working fluid used in fracturing construction. It is a heterogeneous and unstable chemical system formed by a variety of additives in a certain ratio. It can increase the conductivity of the wellbore and increase the productivity of oil and gas wells. role. The necessary conditions for the application of fracturing fluids are high viscosity, low frictional resistance, less fluid loss, less residue, less damage to the formation, easy preparation, wide source of materials, and low cost. Polymer thickener is the main additive o...

Claims

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