Hypersalinity resistant cleaning thickening slick water, cross-linking agent, thickening resistance reducing agent and preparation method

A high-salinity, slick water technology, applied in the field of variable viscosity drag-reducing agent and preparation, cross-linking agent, anti-high salinity cleaning and sticky slick water field, can solve the problem of slick water can not adjust the viscosity, achieve synthesis The process is simple and environmentally friendly, the construction cost is reduced, and the amount of use is small.

Active Publication Date: 2019-07-12
四川申和新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems existing in the prior art and to overcome the problem that the existing conventional slick water cannot adjust the viscosity at any time according to the construction situation, the purpose of the present invention is to provide a kind of anti-high salinity clean and viscous slick water, crosslinking agent, and viscous water. Drag reducing agent and preparation method, by adding a specific cross-linking agent for slick water to change the viscosity of slick water during construction, so as to ensure fracturing construction

Method used

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  • Hypersalinity resistant cleaning thickening slick water, cross-linking agent, thickening resistance reducing agent and preparation method
  • Hypersalinity resistant cleaning thickening slick water, cross-linking agent, thickening resistance reducing agent and preparation method
  • Hypersalinity resistant cleaning thickening slick water, cross-linking agent, thickening resistance reducing agent and preparation method

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preparation example Construction

[0041] A preparation method of a cross-linking agent for anti-high salinity cleaning and viscous slippery water, comprising steps: A, mixing water, ethylene glycol and glycerin to obtain an alcohol-based solvent; adding decahydrate to the alcohol-based solution Sodium borate, mixed to obtain an alcohol-based solution;

[0042] D. After mixing the alcohol-based solution, sodium chloride and sodium citrate, the alcohol-based mixed solution is obtained;

[0043] C. Stir and react the alcohol-based mixed solution at 45°C-50°C for 2.5h-3.5h under airtight conditions, and cool to obtain the crosslinking agent.

[0044] A method for preparing a viscosity-changing drag-reducing agent in clean viscous and slippery water resistant to high salinity, and the viscosity-varying drag-reducing agent is prepared by the following method;

[0045] Include steps:

[0046] A. At a water temperature of 60°C-70°C, add acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, dodecyldimethylallyl ammo...

Embodiment 1

[0060] A cross-linking agent for anti-high salinity cleaning and viscous slippery water, the cross-linking agent is composed of the following components in weight percentage: 7% sodium borate decahydrate; 2% sodium citrate; 0.5% oxygen Zirconium chloride; 20% ethylene glycol; 10% glycerol; 2% sodium chloride; the balance is water.

[0061] A preparation method of a cross-linking agent for anti-high salinity cleaning and viscous slippery water, comprising steps: A, mixing water, ethylene glycol and glycerin to obtain an alcohol-based solvent; adding decahydrate to the alcohol-based solution Sodium borate, mixed to obtain an alcohol-based solution;

[0062] E, after mixing the alcohol-based solution, sodium chloride and sodium citrate, the alcohol-based mixed solution is obtained;

[0063] C. Stir and react the alcohol-based mixed liquid at 45° C. for 2.5 h under airtight conditions, and cool to obtain the crosslinking agent.

Embodiment 2

[0065] A cross-linking agent for anti-high salinity cleaning and viscous slippery water, the cross-linking agent is composed of the following components in weight percentage: 10% sodium borate decahydrate; 3% sodium citrate; 1.0% oxygen Zirconium chloride; 24% ethylene glycol; 12% glycerol; 3% sodium chloride; balance water.

[0066] A preparation method of a cross-linking agent for anti-high salinity cleaning and viscous slippery water, comprising steps: A, mixing water, ethylene glycol and glycerin to obtain an alcohol-based solvent; adding decahydrate to the alcohol-based solution Sodium borate, mixed to obtain an alcohol-based solution;

[0067] F, after mixing the alcohol-based solution, sodium chloride, and sodium citrate, the alcohol-based mixed solution is obtained;

[0068] C. Stir and react the alcohol-based mixed liquid at 48° C. for 3 hours under airtight conditions, and cool to obtain the crosslinking agent.

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Abstract

The invention belongs to technical field of fracturing reformation of an oil-gas well reservoir, and discloses hypersalinity resistant cleaning thickening slick water, a cross-linking agent, a thickening resistance reducing agent and a preparation method. The cross-linking agent comprises the following components in percentage by weight: sodium borate decahydrate, sodium citrate, zirconium oxychloride, glycol, glycerol, sodium chloride and water for the surplus; the thickening slick water comprises the thickening resistance reducing agent and water; the thickening slick water is prepared fromthe thickening cross-linking agent and base fluid; the base fluid comprises the thickening resistance reducing agent and water; the weight ratio of the thickening resistance reducing agent to the water is (0.1-1): (999-999.9); the volume weight ratio of the thickening cross-linking agent to the base fluid is (0.1-0.3mL): (499.7-499.9g); the preparation method of the cross-linking agent comprises the following steps: A, preparing an alcohol-based solution; B, preparing alcohol-based mixed liquor; C, ensuring that the alcohol-based solution is subjected to stirring reaction in a closed condition, and cooling, so as to obtain the cross-linking agent. The viscosity of the base fluid is improved after the base fluid is subjected to crosslinking, the resistance reducing effect is not affected, and fracturing construction can be properly met.

Description

technical field [0001] The invention belongs to the technical field of fracturing reconstruction of oil and gas well reservoirs, and in particular relates to anti-high salinity clean viscous slippery water, a crosslinking agent, a viscous variable drag reducing agent and a preparation method. Background technique [0002] Slippery water is a fracturing fluid system for hydraulic fracturing of shale oil and gas reservoirs, and is one of the key fluids for shale gas development. Compared with the traditional gel fracturing fluid system, the slick water fracturing fluid system is widely used in shale gas development because of its high efficiency and low cost. [0003] Compared with the traditional gel fracturing fluid system, the slick water fracturing fluid system is widely used in shale gas development because of its high efficiency and low cost. As the core additive of the slick water fracturing fluid system, the drag reducer directly determines the performance and applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C08F220/56C08F220/58C08F226/02C08F228/02
CPCC08F220/56C09K8/685C09K8/887C08F220/585C08F226/02C08F228/02
Inventor 邹旭辉陈恒秦鹏李诗琪李金洋弋汶君
Owner 四川申和新材料科技有限公司
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