Optimization method for coal bed gas multi-branch horizontal well trajectory
A trajectory optimization, multi-branch technology, applied in earth-moving drilling, wellbore/well components, production fluid, etc., can solve the problems of not considering convenience and low gas production
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[0095] Among them, the trajectory of A coalbed methane multi-branch horizontal well (hereinafter referred to as well A) is not optimized by the above method; the trajectory of B coalbed methane multi-branch horizontal well (hereinafter referred to as well B) is optimized by the above method.
[0096] (1) Determine the target position according to the drainage convenience target and set the trajectory of the CBM multi-branch horizontal well.
[0097] Optimization of coal seam occurrence and horizontal section trajectory azimuth: The coal seam in this well area has an inclination angle of 3° and a dip of 222°. According to the goal of facilitating drainage and production, the horizontal section trajectory azimuth of Well B is adjusted to be 42° north by east, and the inclination angle is 93° , see Figure 6 .
[0098] Optimize the trajectory of Well B according to the water content characteristics of the coal seam and roof and floor at the target location: use acoustic wave, de...
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