摘要：The prediction of the dynamic change of gas production in coalbed methane reservoirs is of great significance to the development of coalbed methane. Based on the COMET3 numerical simulation soft-ware, the paper simulates the productivity of differ-ent well pattern layouts, and proposes the optimiza-tion of the stimulation technology of coalbed me-thane wells. The paper has reached the following conclusions: square well patterns and diamond-shaped well patterns have different productivity curves, and the simulation results show that square wells The productivity of the well group of the mesh layout is slightly higher than that of the diamond pat-tern; when the number of single wells in the CBM well pattern is different, the interwell interference occurs earlier in the regular quadrilateral patter lay-out; while the regular heptagonal pattern layout is due to the pressure drop rate of different wells Dif-ferent, the time for the formation of interference be-tween adjacent wells is different, so the overall for-mation of interwell interference is later; the partial pressure of the coalbed methane reservoir is reduced by injecting nitrogen or carbon dioxide, thereby pro-moting the desorption of coalbed methane from the coal matrix and injecting Nitrogen has a high dis-placement efficiency. Through the improvement of fracturing technology, the establishment of artificial barriers to control fracture height and variable dis-placement fracturing technology to achieve the pur-pose ofincreasing the production ofCBM wells.
