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Quick-dissolving type seawater-based high-temperature fracturing fluid

A fracturing fluid and instant technology, applied in the field of fracturing fluids, can solve the problems of increased fracturing fluid treatment costs, discounted construction effects, and inability to be prepared and used immediately, achieving fast dissolving speed, complete gel breaking, and beneficial effects. seam effect

Inactive Publication Date: 2017-01-25
安徽炎胜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

The fracturing fluid is mainly prepared on land and then transported to the site by ship for construction. It cannot be prepared and used according to the requirements of the site.
If the amount of fracturing fluid fails to meet the requirements of construction, the effect of construction will be greatly reduced, and the expensive drilling work will be wasted.
Excessive amount of fracturing fluid will increase the transportation cost and the processing cost of fracturing fluid

Method used

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  • Quick-dissolving type seawater-based high-temperature fracturing fluid
  • Quick-dissolving type seawater-based high-temperature fracturing fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Preparation of emulsion thickener

[0023] Prepare acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonate, and vinylpyrrolidone into a 60% aqueous solution with a mass ratio of 35:8:20:5, and adjust the system The pH is 5.5. In addition, take a certain amount of Siban-80 and Tween-20 of the same quality and add them to the oil phase cyclohexane. The emulsifier accounts for 10% of the mass fraction of the oil phase. After stirring, dispersing and dissolving, slowly mix the four Add the aqueous monomer solution into the oil phase, the oil-water ratio is 1.2:1, stir emulsification vigorously while adding, fill with nitrogen for 40min after the emulsification is completed, and add the redox initiation system (ammonium persulfate: sodium bisulfite = 1:2) , control the temperature at 35° C., and react for 8 hours to obtain an inverse emulsion with a final polymer content of 27%.

[0024] Pour 954 parts of seawater into the Warning mixer, start stirring, adjust the s...

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Abstract

The invention discloses a quick-dissolving type seawater-based high-temperature fracturing fluid. The quick-dissolving type seawater-based high-temperature fracturing fluid is prepared by, by weight percentage, 1.0-2.5% of emulsion type thickening agent, 0.5-2.0% of crosslinking agent, 0.05-0.1% of phase inversion agent, 0.4-1.6% of discharge-aiding agent, 0.3-0.8% of clay stabilizer, 0.01-0.03% of gel breaker and the balance seawater, wherein the sum of the weight percentage of the components is 100%. The quick-dissolving type seawater-based high-temperature fracturing fluid has the advantages that the fracturing fluid is excellent in high temperature resistance and shearing resistance, capable of satisfying the construction technological requirements of offshore high-temperature reservoir fracturing transformation of at least 1800 DEG C, outstanding in high-temperature rheological property, stable in shearing resistance and beneficial to sand-carrying fracture making; the emulsion type thickening agent is fast in dissolving and can be prepared and used on site, and the offshore fracturing transformation construction is facilitated greatly.

Description

technical field [0001] The invention belongs to the field of fracturing fluids, in particular to an instant seawater-based high-temperature fracturing fluid. Background technique [0002] Hydraulic fracturing stimulation, as a key stimulation measure for oil and gas reservoir development, has been widely used in oilfield exploration and development. The fracturing fluid is the working fluid in the process of hydraulic fracturing to transform oil and gas layers. The fracturing fluid provides a means of hydraulic fracturing operation. It plays a role in transmitting pressure, forming formation fractures, carrying proppant deep into artificial fractures, and after fracturing is completed. , chemically decomposes or breaks the gel to low viscosity, and ensures that most of the fracturing fluid is flowed back to the ground to clean the fractures. The performance of fracturing fluid is an important factor related to the success or failure of fracturing construction and the effect...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/685
Inventor 王从伟李化真程伟
Owner 安徽炎胜新材料科技有限公司
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