Temporary blocking and deflection fracturing method of in-layer artificial fracture in coalbed gas well

A technology for coalbed methane wells and artificial fractures, which is applied in earthwork drilling, boreholes/well components, and mining fluids, etc., can solve problems such as slow progress in coalbed methane development, and achieve strong plugging capabilities, good connectivity, and easy degradation Effect

Inactive Publication Date: 2018-01-26
北京泰坦通源天然气资源技术有限公司 +1
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Problems solved by technology

In recent years, the world's energy has become increasingly tense, and mo

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[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0036] A kind of intralayer artificial fracture temporary plugging diversion fracturing method of coalbed methane well proposed in the present invention comprises the following steps:

[0037] S1, use clean water as fracturing fluid at 0.6-1.0m 3 The displacement per minute replaces the liquid in the wellbore;

[0038] S2, at 8.0-12.0m 3 The displacement per minute is injected into the wellbore to form the main fracture in the coal seam;

[0039] S3, using a...

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Abstract

The invention relates to a temporary blocking and deflection fracturing method of an in-layer artificial fracture in a coalbed gas well. According to the temporary blocking and deflection fracturing method, a fracture blocking agent with the high strength is used to enter an opened fracture along with adding of fracturing fluid to form bridge blinding, net pressure of the fracture is improved, fluid is subjected to deflection in a stratum to form fractures in different directions or enable fractured sand to be uniformly distributed in the fracture, so that a new fluid flowing channel is openedin a reservoir, wider communication of an oil and gas reservoir is achieved, and oil and gas production is increased.

Description

technical field [0001] The invention relates to the technical field of coalbed methane exploitation, in particular to a fracturing method for applying a temporary plugging agent in a wellbore of a coalbed methane well to achieve the technical effect of intralayer fracture diversion. Background technique [0002] As an unconventional energy source, coalbed methane is an extremely critical new clean energy source in China. In recent years, the world's energy has become increasingly tense, and more and more domestic enterprises have paid attention to coal-bed methane. However, the development of domestic coal-bed methane is currently progressing slowly, especially the coal-bed methane resources in Guizhou. The characteristics of many thin coal seams in the Qianbei region of Guizhou make the exploration, development and production process of coalbed methane extremely complicated, especially the challenges in fracturing and reconstruction are more significant. As one of the main...

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Application Information

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IPC IPC(8): E21B43/267E21B43/26
Inventor 李启国
Owner 北京泰坦通源天然气资源技术有限公司
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