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A high-temperature-resistant full-suspension low-damage fracturing fluid and its preparation method

A full-suspension, fracturing fluid technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of sand-carrying performance that have not been disclosed or elaborated in detail, and achieve excellent sand-carrying performance and strong shear recovery , Improve the effect of transformation effect

Active Publication Date: 2021-09-21
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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  • A high-temperature-resistant full-suspension low-damage fracturing fluid and its preparation method
  • A high-temperature-resistant full-suspension low-damage fracturing fluid and its preparation method
  • A high-temperature-resistant full-suspension low-damage fracturing fluid and its preparation method

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-harm thickener, 0.1-0.4 parts of multi-functional stabilizer; 0.1-0.3 parts of regulator; 0.4-0.8 parts of suspension synergist, and the remaining components are clear water or salt water within a certain salinity range .

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

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-harm thickener, 0.3-0.5 parts, multi-functional stabilizer, 0.1-0.4 parts; conditioner, 0.1-0.3 parts; suspension synergist, 0.4-0.8 parts, and the remaining components are clear water or within a certain salinity range brine.

[0052] Among them, the low-harm thickener consists of a mixture of main chain monomer A acrylamide, main chain monomer B acrylic acid, salt-tolerant monomer N-vinylpyrrolidone and N-allylimidazole, etc. Composition of acetone acrylamide. The thickener is produced by Chengdu Baichun Petroleum Technology Co., Ltd., the product code is BCG-1XF-2, and the basic performance index achieved is the same as that of Example 1.

[0053] The multifunctional stabilizer is produced by Chengdu Baichun Petroleum Company. The product code is BC-5-1. The product is a colorless or light yellow tr...

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-harm thickener, 0.3-0.5 parts, multi-functional stabilizer, 0.1-0.4 parts; conditioner, 0.1-0.3 parts; suspension synergist, 0.4-0.8 parts, and the remaining components are clear water or within a certain salinity range brine.

[0063] Among them, the low-harm thickener consists of 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, and the cross-linking monomer It is prepared by polymerization of diacetone acrylamide. The thickener is produced by Chengdu Baichun Petroleum Technology Co., Ltd., the product code is BCG-1XF-3, and the basic performance index achieved is the same as that of Example 1.

[0064] Multifunctional stabilizer BC-5-2, the product is a colorless or light yellow transparent li...

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Abstract

The invention discloses a high-temperature-resistant full-suspension low-injury fracturing fluid, which comprises the following components in weight percent: 0.3-0.5% of a low-injury thickener, 0.1-0.4% of a multi-functional stabilizer, and 0.1-0.3% of a regulator , suspension synergist 0.4-0.8%, the rest is clear water or salt water; the preparation method of fracturing fluid is: Step 1, add low-damage thickener, multi-functional stabilizer and regulator into clear water or salt water under stirring conditions, Stir evenly and swell for 2 to 4 hours to obtain the fracturing fluid base fluid; step 2, fully mix the fracturing fluid base fluid and the suspension synergist, and form sand-carrying performance and Full-suspension fracturing fluid with excellent thermal performance. The fracturing fluid of the present invention is a super-strength structural fluid formed by physical cross-linking and chemical cross-linking of acrylamide polymers and suspension synergists, with a temperature resistance of up to 150°C; excellent sand-carrying performance, The spatial structure can fully suspend the proppant and is less affected by temperature.

Description

technical field [0001] The invention relates to the technical field of oilfield 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 to create fractures and transport proppant along the length of the fracture in fracturing construction, and 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 operation requires the fracturing fluid to have many excellent performance characteristics, the most important of which are: (1) universal water quality applicability; (2) wide temperature range; (3) excellent shear resistance (4) Efficient sand-carrying performance; (5) Minimal damage characteristics. [0003] Since the 1960s, guar gum-based fracturing fluids have dominated fracturing operations. Although these fracturing fluids have been co...

Claims

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Application Information

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Patent Type & Authority Patents(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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