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High-temperature-resistant automatic gel breaking type surfactant fracturing fluid

A technology of surfactant and automatic gel breaking, applied in the field of fracturing fluid, can solve the problems of high cost, difficult preparation, low temperature resistance of surfactant fracturing fluid, etc. Effect

Active Publication Date: 2016-06-15
咸阳万众生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of the application of the entire petroleum industry, the low temperature resistance of surfactant fracturing fluid, difficulty in preparation, and high cost are the main reasons for the limitation of field application of this system technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of high-temperature-resistant automatic gel-breaking type surfactant fracturing fluid, the fracturing fluid consists of 3kg of fatty alcohol diaminosuccinate, 1kg of sodium p-tert-butylbenzoate, 2kg of potassium chloride, 0.2kg of A mixture of formic acid and 93.8 kg of water.

[0014] The preparation method of described a kind of high-temperature-resistant automatic gel-breaking type surfactant fracturing fluid is: first 2kg potassium chloride is dissolved in the water of 93.8kg, then sequentially add 3kg of fatty alcohol diaminosuccinate and 1kg of sodium p-tert-butylbenzoate, stir well, and finally add 0.2kg of formic acid, stir evenly.

[0015] The viscoelastic high-temperature-resistant and automatic gel-breaking type surfactant fracturing fluid prepared by the above-mentioned method in the present invention operates at a temperature of 140°C and a shear rate of 170S -1 Under the conditions, the apparent viscosity is greater than 20mPa.s, so the use of this...

Embodiment 2

[0017] A kind of high-temperature-resistant automatic gel-breaking type surfactant fracturing fluid, the fracturing fluid is composed of 0.6kg fatty alcohol diaminosuccinate, 0.1kg sodium p-tert-butylbenzoate, 3.6kg potassium chloride, 0.1kg formic acid And the mixture that 95.6kg water forms.

[0018] The preparation method of the described a kind of high-temperature-resistant automatic gel-breaking type surfactant fracturing fluid is: first dissolve 3.6kg potassium chloride in 95.6kg water, then add 0.6kg dimeric aminosuccinic acid fatty alcohol in sequence ester and 0.1kg of sodium p-tert-butylbenzoate, stir well, and finally add 0.1kg of formic acid, stir evenly, and that’s it.

[0019] The viscoelastic high-temperature-resistant automatic gel-breaking type surfactant fracturing fluid prepared by the above-mentioned method in the present invention can be used at a temperature of 130°C and a shear rate of 170S -1 Under the conditions, the apparent viscosity is greater than...

Embodiment 3

[0021] A kind of high-temperature-resistant automatic gel-breaking type surfactant fracturing fluid, the fracturing fluid consists of 2kg of fatty alcohol diaminosuccinate, 1.5kg of sodium p-tert-butylbenzoate, 4kg of potassium chloride, 0.3kg A mixture of formic acid and 92.2kg of water.

[0022] The preparation method of described a kind of high-temperature resistant automatic gel-breaking type surfactant fracturing fluid is: first 4kg potassium chloride is dissolved in the water of 92.2kg, then sequentially add 2kg of fatty alcohol diaminosuccinate and 1.5kg of sodium p-tert-butylbenzoate, stir well, and finally add 0.3kg of formic acid, stir evenly, and that’s it.

[0023] The viscoelastic high-temperature-resistant automatic gel-breaking type surfactant fracturing fluid prepared by the above-mentioned method in the present invention can be used at a temperature of 130°C and a shear rate of 170S -1 Under the conditions, the apparent viscosity is greater than 20mPa.s, so t...

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PUM

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Abstract

The invention relates to high-temperature-resistant automatic gel breaking type surfactant fracturing fluid. The high-temperature-resistant automatic gel breaking type surfactant fracturing fluid is characterized in that the fracturing fluid a mixture, and the mixture comprises, by weight, 0.6-5.5% of polyamino succinic acid fatty alcohol ester, 0.1-1.5% of sodium p-t-butylbenzoate, 2-4% of potassium chloride, 0.1-0.3% of formic acid and 92.2-95.6% of water. The high-temperature-resistant automatic gel breaking type surfactant fracturing fluid has the advantages that the high-temperature-resistant automatic gel breaking type surfactant fracturing fluid is easy to prepare, gel can be automatically broken, the temperature resistance of the high-temperature-resistant automatic gel breaking type surfactant fracturing fluid is higher than 130 DEG C, and the like.

Description

technical field [0001] The invention relates to a fracturing fluid used in the exploitation of high-temperature oil and gas reservoirs, in particular to a high-temperature-resistant automatic gel-breaking surfactant fracturing fluid for fracturing of high-temperature oil and gas wells. Background technique [0002] Hydraulic fracturing is an effective method for increasing production of oil and gas reservoirs, and an important measure for increasing production and injection of oil and gas wells. One of the outstanding characteristics of my country's oil and gas resources is that low-permeability oil and gas layers are widely distributed and have large reserves. This objectively existing resource condition determines that hydraulic fracturing is the preferred measure and effective method for increasing reserves and production in low-permeability oil and gas fields. The exploration and development of new oil and gas fields and the stable and increased production of old oil and ...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/604C09K8/68C09K8/885
Inventor 李刚陈柯全
Owner 咸阳万众生物科技有限公司
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