Biodegradable salt-resistant thickening system as well as preparation method and application thereof

A biodegradable and systematic technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as temperature resistance, poor salt resistance, formation damage, difficult to handle flowback fluid, etc., to achieve convenient and flexible use Compounding, damage reduction effects
CN113185630AActive Publication Date: 2021-07-30四川川庆井下科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
四川川庆井下科技有限公司
Publication Date
2021-07-30

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Abstract

The invention discloses a biodegradable salt-resistant thickening system and a preparation method and application thereof. A biodegradable polyacrylamide-based polymer is used in the thickening system, the biodegradable polyacrylamide-based polymer comprises a first monomer unit and a second monomer unit, wherein the first monomer is selected from one or more of acrylamide and amino-substituted acrylamide, and the second monomer is selected from one or more of maleic anhydride, vinyl acetate, epsilon-caprolactone, acrylic ester, vinyl acetoacetate, p-vinylaniline and acrylic acid. Compared with an existing fracturing system, the thickening system has good salt tolerance when applied to the fracturing system; the biodegradability is good, and the damage to the surrounding environment and the stratum permeability can be reduced; the viscosity can be formed in a short time during on-site preparation, the operation is simple, and the use is convenient; and flexible preparation of slick water and a linear glue solution can be realized by controlling the dosage, and the advantages of one agent with multiple purposes are achieved.
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Description

technical field

[0001] The invention relates to the field of acidizing fracturing agents, in particular to a biodegradable salt-tolerant thickening system and its preparation method and application. Background technique

[0002] The application of hydraulic fracturing technology in oil fields began in the 1940s. After nearly 70 years of development, it has gradually become one of the important production stimulation measures to improve oil and gas well productivity and oil reservoir recovery. Especially in recent years, low-permeability reservoirs are faced with the situation of "low oil recovery rate, low recovery rate, low reserve production rate, and difficulty in energy replenishment". As the main technical means to improve the productivity of low-permeability reservoirs, hydraulic fracturing more attention. With the prolongation of oil and gas exploration and development, conventional oil and gas production continues to decline, and low-permeability and ultra-low-perme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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