Numerical simulation of coalbed methane development in Linxing block based on segmented fractured horizontal wells
As an important part of unconventional natural gas,coalbed methane(CBM)has garnered considerable attention for its efficient development technology.Horizontal well staged fracturing technology is one of the key tech-nologies in the current development of unconventional natural gas.Consequently,it is necessary to conduct numerical simulations on block CBM development based on staged fracturing horizontal wells,in order to improve the develop-ment effect of CBM and achieve process optimization.Based on a fluid-solid coupling mathematical model of CBM de-velopment,accounting for the distribution of cleat systems in coal reservoirs,taking the Linxing block as the research object,a physical model of horizontal well staged fracturing was established to perform numerical simulations of CBM reservoir pressure and productivity.The simulations analyzed changes in coal seam pressure and factors influen-cing gas production.The results show that the staged fracturing of horizontal wells for CBM development can achieve remote area control within about 365 days,with relatively stable well pressure.Increasing the number of cleats and fracture parameters can improve the gas production effect of CBM,but the development cost of horizontal well staged fracturing technology and the impact of factors such as inter-well interference need to be considered.The numerical simulation model of block CBM development based on staged fracturing horizontal wells can provide reference and guidance for the staged fracturing technology of horizontal wells to achieve efficient development of CBM.
coalbed methanehorizontal well staged fracturingnumerical simulationfracture parametersreser-voir pressurenumber of cleatsgas production effect
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