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Novel environment-friendly shale gas flowback agent

A flowback agent, shale gas technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of long-term development loss, reservoir damage, high salinity in shale gas development, and ensure normal The effect of production and sustainable development, efficient flowback rate, good environmental protection

Inactive Publication Date: 2015-02-25
AOFEI BEIJING PETROLEUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, hydraulic fracturing is the main means of developing shale gas, but the low flowback rate of fracturing fluid after fracturing will cause reservoir damage; fracturing flowback fluid has high viscosity, high stability, and suspended matter Many, high salinity and complex composition
If not handled properly, the long-term development of shale gas development will cause immeasurable losses
Adding a flowback agent into the fracturing fluid can increase the flowback rate, but most of the flowback agents currently used have poor flowback effects and cannot meet the demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of the new environment-friendly flowback agent, the weight percentage of each component, the proportioning ratio is as follows:

[0016] Foaming agent 6%

[0017] Catalyst 4%

[0018] Surfactant 2.5%

[0019] Chloride metal salts 4%

[0020] The rest is water.

[0021] For the flowback agent of this embodiment, according to the weight percentage of the above components, sequentially add foaming agent, catalyst, surfactant, and chloride metal salt into the container, stir, and mix to a uniform state to obtain this product.

Embodiment 2

[0023] The preparation method of the new environment-friendly flowback agent, the weight percentage of each component, the proportioning ratio is as follows:

[0024] Foaming agent 8%

[0025] Catalyst 4.5%

[0026] Surfactant 3%

[0027] Chloride metal salts 6%

[0028] The rest is water.

[0029] For the flowback agent of this embodiment, according to the weight percentage of the above components, sequentially add foaming agent, catalyst, surfactant, and chloride metal salt into the container, stir, and mix to a uniform state to obtain this product.

Embodiment 3

[0031] The preparation method of the new environment-friendly flowback agent, the weight percentage of each component, the proportioning ratio is as follows:

[0032] Foaming agent 7.5%

[0033] Catalyst 6%

[0034] Surfactant 4.5%

[0035] Chloride metal salts 10%

[0036] The rest is water.

[0037] For the flowback agent of this embodiment, according to the weight percentage of the above components, sequentially add foaming agent, catalyst, surfactant, and chloride metal salt into the container, stir, and mix to a uniform state to obtain this product.

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PUM

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Abstract

The invention discloses a novel environment-friendly shale gas flowback agent. The components include, by weight: 6% to 8% of foaming agent, 4% to 6% of catalyst, 2.5% to 4.5% of surface active agent, 4% to 10% of chloride metal salt and the balance of water. The foaming agent is methyl isobutyl carbinol; the catalyst is sodium hypochlorite; the surface active agent is NPES (sodium nonylphenol polyoxyethylene ether sulfate); the chloride metal salt is potassium chloride or ammonium chloride. The flowback agent has the advantages of high flowback rate, fine environment-friendly performance, high flowback speed, cleanness and pollution avoidance and has significance for normal production of shale gas, environment protection and sustainable development.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas field exploitation, in particular to a novel environmentally friendly flowback agent for shale gas. Background technique [0002] Shale gas is an important unconventional energy source. In recent years, my country is in the upsurge of developing shale gas. In the "12th Five-Year Plan" for shale gas, the country clearly requires to promote the development of shale gas and other unconventional oil and gas resources. Utilize, increase the supply of natural gas resources, alleviate the contradiction between supply and demand of natural gas in my country, adjust the energy structure, and promote energy conservation and emission reduction. Compared with conventional natural gas, due to the low permeability of shale formations, it is very difficult to develop. Therefore, hydraulic fracturing is the main means of developing shale gas, but the low flowback rate of fracturing fluid after ...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/68
Inventor 王绍权王一林
Owner AOFEI BEIJING PETROLEUM TECH
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