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

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...

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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 fractured zone relative to the horizontal well is completely abandoned in the existing coalbed methane exploitation process, which reduces the mining amount of coalbed methane. The problem of wasting resources

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