High-temperature-resistant full-suspension low-damage fracturing fluid and preparation method thereof

A full suspension, fracturing fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of sand-carrying performance that is not disclosed or elaborated in detail, so as to reduce reservoir damage, reduce damage, and improve fracturing. effect of effect

Active Publication Date: 2019-04-19
SOUTHWEST PETROLEUM UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fracturing fluid did not disclose or elaborate on its sand-carrying performance.

Method used

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  • High-temperature-resistant full-suspension low-damage fracturing fluid and preparation method thereof
  • High-temperature-resistant full-suspension low-damage fracturing fluid and preparation method thereof
  • High-temperature-resistant full-suspension low-damage fracturing fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A high temperature resistant full suspension low damage fracturing fluid system, based on 100 parts by weight, the content of each component is as follows:

[0039] 0.3-0.5 parts of low-damage thickener, 0.1-0.4 parts of multifunctional stabilizer; 0.1-0.3 parts of regulator; 0.4-0.8 parts of suspension synergist, and the remaining components are clean water or brine within a certain salinity range .

[0040] Among them, the low-damage thickener consists of main chain monomer A acrylamide, main chain monomer B sodium acrylate, salt-tolerant monomers 2-acrylamido-2-phenylethanesulfonic acid and N-allylimidazole. The mixture of N-vinyl caprolactam, a crosslinking monomer, is formed by polymerization reaction. The thickener is produced by Chengdu Baichun Petroleum Technology Co., Ltd., the product code is BCG-1XF-1, the product is a white particle or powder of <80 mesh, and the apparent molecular weight is 2 to 3 million. Further, the basic performance of the product Indicato...

Embodiment 2

[0050] A high temperature resistant full suspension low damage fracturing fluid system, based on 100 parts by weight, the content of each component is as follows:

[0051] Low-damage thickener, 0.3-0.5 parts, multi-functional stabilizer 0.1-0.4 parts; regulator 0.1-0.3 parts; suspension synergist, 0.4-0.8 parts, the remaining components are clean water or within a certain range of salinity brine.

[0052] Among them, the low-damage thickener is a mixture of the main chain monomer A acrylamide, the main chain monomer B acrylic acid, the salt-tolerant monomer N-vinylpyrrolidone and N-allylimidazole, which promotes the double crosslinking monomer. Composed of acetone acrylamide. The thickening agent is produced by Chengdu Baichun Petroleum Technology Co., Ltd., and the product code is BCG-1XF-2. The basic performance indicators achieved are the same as those in Example 1.

[0053] The multifunctional stabilizer is produced by Chengdu Baichun Petroleum Company. The product code is BC-5...

Embodiment 3

[0061] A high temperature resistant full suspension low damage fracturing fluid system, based on 100 parts by weight, the content of each component is as follows:

[0062] Low-damage thickener, 0.3-0.5 parts, multi-functional stabilizer 0.1-0.4 parts; regulator 0.1-0.3 parts; suspension synergist, 0.4-0.8 parts, the remaining components are water or within a certain salinity range brine.

[0063] Among them, the low-damage thickener is a mixture of the main chain monomer A acrylamide, the main chain monomer B acrylic acid, the salt-tolerant monomer N-allylimidazole and vinylphosphonic acid. Made by polymerization of diacetone acrylamide. The thickener is produced by Chengdu Baichun Petroleum Technology Co., Ltd., and the product code is BCG-1XF-3, and the basic performance indicators achieved are the same as those in Example 1.

[0064] Multifunctional stabilizer BC-5-2, the product is a colorless or light yellow transparent liquid, its components and content are: sorbitol and imin...

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Abstract

The invention discloses a high-temperature-resistant full-suspension low-damage fracturing fluid, which comprises the following components in percentage by weight: 0.3-0.5% of a low-damage thickeningagent, 0.1-0.4% of a multifunctional stabilizer, 0.1-0.3% of a regulator, 0.4-0.8% of a suspension synergist and the balance of clear water or saline water; the preparation method of the fracturing fluid comprises the following steps of: 1, adding the low-damage thickening agent, the multifunctional stabilizer and the regulator into clear water or saline water under a stirring condition, uniformlystirring, and swelling for 2 to 4 hours to obtain fracturing fluid base liquid; 2, fully mixing the fracturing fluid base liquid and the suspension synergist to form the full suspension fracturing fluid with excellent sand carrying performance and temperature resistance under the combined action of physical crosslinking and chemical crosslinking. The fracturing fluid is superstrong structure fluid formed by carrying out physical crosslinking and chemical crosslinking on acrylamide polymer and suspension synergist together, and the temperature resistance can reach 150 DEG C; the sand carryingperformance is excellent, the strong spatial structure can completely suspend a proppant, and the influence of temperature is small.

Description

Technical field [0001] The invention relates to the technical field of oil field chemistry, in particular to a high-temperature resistant full suspension low-damage fracturing fluid and a configuration method thereof. Background technique [0002] Fracturing fluid is a fluid used in fracturing construction to create joints and transport proppant along the length of the fracture. It is one of the key factors that determine the success or failure of the construction and the construction effect. A successful and efficient fracturing construction requires the fracturing fluid to have many excellent performance characteristics, the most important of which are: (1) universal water quality applicability; (2) wide temperature adaptation range; (3) excellent shear resistance Cutting performance; (4) Efficient sand carrying performance; (5) Very small damage characteristics. [0003] Since the 1960s, guar gum-based fracturing fluids have taken a dominant position in fracturing construction....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/685
Inventor 刘通义陈光杰谭坤林波魏俊戴秀兰吴政
Owner SOUTHWEST PETROLEUM UNIV
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