Abstract
From vertical well to horizontal well drilling in coalbed methane, coalbed methane extraction drilling footage in the seam have increased by several times and even hundreds. And horizontal wells in gas production is only 3-10 times to vertical wells, which have not increased accordingly. Among all the reasons, not only vertical well fracturing improved the coal seam permeability, but also horizontal well section seepage area far less than vertical well seepage area. In order to improve the horizontal well section seepage area, based on the analysis of matures application in hydraulic cutting technology, consider using it, after the completion of construction in CBM horizontal well, then cut a line through the coal seam fissure, so that horizontal well can be consider as countless vertical well arrangement in horizontal direction, which played a big advantage in section seepage area of vertical well. Its effect of gas will also be greatly improved compared to common horizontal well.
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