Slick water fracturing fluid for medium-high temperature compact reservoir and preparation method thereof

A tight reservoir, water fracturing technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as poor temperature resistance and shear resistance, high construction risk, and poor sand-carrying performance. Achieve the effect of good temperature resistance and shear resistance, obvious drag reduction effect, and not easy to curl and deform
CN110295036AInactive Publication Date: 2019-10-01PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2019-10-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of oil field stimulation, and particularly relates to a slick water fracturing fluid for medium-high temperature compact reservoirs and a preparation method thereof. The slick water fracturing fluid comprises the following components in percentage by weight: 0.30 to 0.45 percent of a thickening agent, 0.03 to 0.05 percent of a clay stabilizer, 0.20 to 0.50 percent of a structural stabilizer, 0.01 to 0.05 percent of a strength maintaining agent, 0.04 to 0.10 percent of a temperature resistant regulator, 0.05 to 0.10 percent of a gel breaker degradingagent and the balance of water. The slick water fracturing fluid has fast dissolution. In 30 seconds, 80% of the final viscosity increase can be achieved, the drag reduction rate can reach more than80%, the core damage rate is less than 10%, well temperature resistance and shear resistance can be satisfied under the medium and high temperature conditions of 90 deg c to 180 deg c, the sand carrying concentration can meet the construction requirements of more than 750 kg / m<3>, the gel breaking is complete, the drainage rate can reach more than 40%, and after simple sand settling treatment, theslick water fracturing fluid can be reused for more than 20 times to maintain more than 90% of the original performance.
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Description

technical field

[0001] The invention belongs to the technical field of oilfield stimulation, in particular to a slickwater fracturing fluid for medium-high temperature tight reservoirs and a preparation method thereof. Background technique

[0002] Fracturing, as the main stimulation measure of oil and gas reservoirs, has been developed rapidly and widely used. Fracturing is the use of pressure to open formations to form fractures and support them with proppant to reduce fluid flow resistance and increase production and injection measures. The purpose of fracturing is to form fractures with conductivity in the formation. The fracturing fluid used determines the fracturing effect to a large extent. At the same time, there are certain requirements for the viscosity of the fracturing fluid so that it can Fluids known as low viscosity flow back easily to avoid damage to hydrocarbon layers in the formation.

[0003] The most commonly used fracturing fluids at home and abroad ar...

Claims

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