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Low-friction cleaning fracturing fluid for coal-bed gas

A clean fracturing fluid and low-friction technology, which is applied in the direction of drilling composition, chemical instruments and methods, can solve the problems of large coal seam damage and high friction of fracturing fluid, so as to reduce construction pressure and flow back Easier and lower construction work costs

Inactive Publication Date: 2016-06-15
CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the technical problem that the existing fracturing fluid has a large frictional resistance and a large damage to the coal seam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In order to overcome the problem of high friction of existing fracturing fluids and great damage to coal seams, this embodiment provides a low-friction clean fracturing fluid for coalbed methane, including the following components: by mass percentage, 0.1-0.5 % Octadecylglyceryl Dimethyl Ammonium Chloride, 0.1-0.2% Sodium Dibutyl Naphthalene Sulfonate, 0.2-0.3% Potassium Chloride and 90.0-96.0% Water. The above-mentioned raw materials and reagents can be purchased directly from the market.

[0028] The preparation method of this coalbed methane with low friction clean fracturing fluid is as follows:

[0029] 1) Prepare the following components: by mass percentage, 0.1-0.5% octadecyl glyceryl dimethyl ammonium chloride, 0.1-0.2% sodium dibutylnaphthalenesulfonate, 0.2-0.3% chloride Potassium and 90.0-96.0% water;

[0030] 2) Add 90.0-96.0% water to the reaction axe;

[0031] 3) Add 0.1-0.5% octadecyl glyceryl dimethyl ammonium chloride and stir to fully dissolve;

[...

Embodiment 2

[0035] This embodiment provides a low-friction clean fracturing fluid for coalbed methane, comprising the following components: by mass percentage, 0.5% octadecyl glyceryl dimethyl ammonium chloride, 0.2% dibutyl Sodium naphthalene sulfonate, 0.3% potassium chloride and 90.0% water. The above-mentioned raw materials and reagents can be purchased directly from the market.

[0036] The preparation method of this coalbed methane with low friction clean fracturing fluid is as follows:

[0037] 1) Prepare the following components: by mass percentage, 0.5% octadecyl glyceryl dimethyl ammonium chloride, 0.2% sodium dibutylnaphthalene sulfonate, 0.3% potassium chloride and 90.0% water;

[0038] 2) Add 90.0% water to the reaction axe;

[0039] 3) Add 0.5% octadecyl glyceryl dimethyl ammonium chloride and stir to fully dissolve;

[0040] 4) Then add 0.2% sodium dibutylnaphthalene sulfonate, stir well and mix well;

[0041] 5) Finally, add 0.3% potassium chloride and stir for 1 hour ...

Embodiment 3

[0043] This embodiment provides a low-friction clean fracturing fluid for coalbed methane, including the following components: by mass percentage, 0.1% octadecyl glyceryl dimethyl ammonium chloride, 0.1% dibutyl Sodium naphthalenesulfonate, 0.2% potassium chloride and 96.0% water. The above-mentioned raw materials and reagents can be purchased directly from the market.

[0044] The preparation method of this coalbed methane with low friction clean fracturing fluid is as follows:

[0045] 1) Prepare the following components: by mass percentage, 0.1% octadecyl glyceryl dimethyl ammonium chloride, 0.1% sodium dibutylnaphthalene sulfonate, 0.2% potassium chloride and 96.0% water;

[0046] 2) Add 96.0% water to the reaction axe;

[0047] 3) Add 0.1% octadecyl glyceryl dimethyl ammonium chloride and stir to fully dissolve;

[0048] 4) Then add 0.1% sodium dibutylnaphthalene sulfonate, stir well and mix well;

[0049] 5) Finally, add 0.2% potassium chloride and stir for 1 hour to...

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Abstract

The invention provides a low-friction clean fracturing fluid for coalbed methane, comprising the following components: by mass percentage, 0.1-0.5% octadecyl glyceryl dimethyl ammonium chloride, 0.1-0.2 % sodium dibutylnaphthalene sulfonate, 0.2-0.3% potassium chloride and 90.0-96.0% water. The fracturing fluid has a simple preparation method, low viscosity, low friction, no gel breaking, and can be reused, which reduces construction operation costs, low friction, and reduces construction pressure. It is a clean and environmentally friendly fracturing fluid that can be used Achieve large displacement (10m 3 / min) above volume fracturing construction to improve the effect of coal seam stimulation.

Description

technical field [0001] The invention relates to the research field of fracturing stimulation used in the exploitation of coalbed methane, in particular to a low-friction clean fracturing fluid used for fracturing of a coalbed methane single well or cluster well group. Background technique [0002] Hydraulic fracturing stimulation technology is a preferred effective stimulation measure for mining coalbed methane. More than 90% of coalbed methane wells in the United States are transformed by hydraulic fracturing. At present, almost all gas production in my country is below 1000m 3 Surface vertical wells above / d are obtained through hydraulic fracturing. [0003] Hydraulic fracturing is to inject liquid into the wellbore at a rate higher than the adsorption capacity of the formation, and generate a pressure higher than the fracture strength of the reservoir in the wellbore, so that the reservoir "breaks" and extends into the layer to form one or several fractures. At the same...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/602C09K8/68C09K8/86
Inventor 马托黄超王坤汪小宇蒋文学柴巧玲
Owner CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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