Method for guiding drilling and bridging of horizontal coal bed methane well

A technology for horizontal wells and coalbed methane, which is applied to wellbore/well components, earthwork drilling, and fluid extraction, etc., can solve the problems of wasting resources and reducing the production volume of coalbed methane, and achieves the effect of increasing the footage of coal seams and improving the mining effect.

Active Publication Date: 2011-01-05
BEIJING ORION ENERGY TECH DEV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for bridging and guiding a coalbed methane horizontal well, so as to solve the problem that the coal seam on the other side of the fractu

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  • Method for guiding drilling and bridging of horizontal coal bed methane well
  • Method for guiding drilling and bridging of horizontal coal bed methane well
  • Method for guiding drilling and bridging of horizontal coal bed methane well

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[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments and drawings are only used to help understand the present invention, but cannot limit the scope of protection of the present invention. The present invention can be defined and covered by the claims. Way to implement.

[0023] In order to effectively mine the CBM in the coal seam while ensuring the total footage of the horizontal well in the coal seam or the footage of pure coal, it is necessary to find a method to treat the coal-bed methane in the coal seam on the other side of the broken zone relative to the horizontal well Very important.

[0024] To this end, the inventor of the present invention proposes a method for drilling and bridging and steering of a coalbed methane horizontal well, which includes the following steps:

[0025] Obtain regional seismic data of the area to be mined; implement pre-exploration vertical wells a...

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Abstract

The invention provides a method for guiding the drilling and bridging of a horizontal coal bed methane well, which is characterized by comprising the following steps of: acquiring regional earthquake data of an area to be exploited; pre-exploring a straight well according to the regional earthquake data of an area to be exploited, and measuring the actual condition of a coal bed; pre-exploring a horizontal well according to the measured actual condition of the coal bed, and measuring actual information parameters of a shatter zone in the coal bed; determining a bridging route according to the actual condition of the coal bed, the actual information parameters of the shatter zone and the deflecting capacity of a drilling tool; and moving round the position of the shatter zone by using the drilling tool according to the determined bridging route. By drilling the horizontal well according to the method for guiding the drilling and bridging of the horizontal well, the coal bed methane in a coal bed area on the other side of the horizontal well relative to the shatter zone can be reasonably utilized, the coal bed footage of the horizontal well is increased, and the yield of the coal bed methane is improved.

Description

technical field [0001] The invention relates to the field of coal bed gas exploitation, and more particularly relates to a method for bridging and guiding a horizontal well or a multi-branch horizontal well. Background technique [0002] As a high-quality, efficient and clean energy, coalbed methane has been paid more and more attention. In order to better collect coalbed methane, the requirements for coalbed methane mining methods are getting higher and higher. Existing coalbed methane mining usually adopts multi-branch horizontal well drilling. This drilling method can ensure the total footage of the horizontal well, and use logging while drilling (LWD) to conduct electrical tests on the formation characteristics in the horizontal well while drilling. According to this feature, it can be judged whether the drilling tool is in Advance in the seam or out of the seam. If the drill bit is outside the coal seam, it is necessary to use the technology of increasing or decreasin...

Claims

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Application Information

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IPC IPC(8): E21B43/30
Inventor 史现武宁守方方勇黄红春刘兵杨锐张杰
Owner BEIJING ORION ENERGY TECH DEV
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