煤层气井数值模拟研究

Research on Numerical Simulation of Coalbed Me thane Well

采用Langmuir等温吸附定律，Fick第一定律和达西渗流理论建立起了描述煤层气从煤基质解吸经扩散进入裂隙，由裂隙运移至生产井筒产出的全过程数学模型，讨论了模型的全隐式联立求解方法，并将其应用于沁水盆地煤层气井的开采潜能预测，效果良好.

On the basis of the Langmuir’s adsorption isotherm theorem, th e Fick’s first law and the Darcy law, the auth ors have established the mathematical model describing the whole process in whic h co albed methane desorbs from coal matrix, moves into fractures due to diffusion, a nd migrates t o production well, discussed the fullyimplicit solution method of the model, a n d applied it to the prediction of production potentiality of coalbed methane well in Qinshui basin.