Study on optimization of well pattern and well spacing for CBM development：Taking Daning Block as an example

CBM well pattern optimization design and deployment is a key part of CBM development plan formulation. Reasonable well pattern deployment can not only optimize CBM production, but also reduce CBM development costs and improve economic benefits. In response to this problem, taking Daning block in the Ordos Basin as the research object, the coal seam conditions and coal reservoir characteristics in the study area were systematically analyzed, and the suitable well type and well pattern orientation for CBM development were determined. The results show that the No.5 coal seam of Shanxi Formation in the Daning block has the characteristics of large thickness, simple structure, high gas content and low permeability. The well type of CBM development should be mainly directional wells, supplemented by horizontal wells, with the corresponding well pattern for large-scale development, and the well pattern orientation is NE66°; using the CBM productivity numerical simulation software COMET3, the current use of the Danin