水气二相渗流耦合模型及其应用

Coupling model and application of two phase flow of water and gas

本文建立了非饱和带水气二相渗流的耦合模型,并采用IMPES(隐式求解压力方程,显式求解饱和度)求解方法对该模型进行了求解。在此基础上,将该模型应用于沁水盆地TL煤层气井水气运移、产出的模拟计算,利用该井1999年2月9日～5月6日的水气排采资料,通过历史拟合计算,对影响该井水气产量的主要参数(如渗透率、表皮系数、相对渗透率等)进行了校正、识别,预测了该井未来20年的水气产量动态变化特征。

Having established the coupling model of two phase flow of water and gas and used the method of IMPES(implicit pressure-explicit saturation method) to solve it, this paper apply it to the simulation and calculation of transport and production of water and gas of TL coal bed methane well in Qinshui basin. Based on the data of production of water and gas of this well from February 9th 1999 to May 6th 1999, this paper conduct the calculation of history match, calibrate the parameters of this model, for example permeability, skin factor, relative permeability and so on, and forecasts the yield of water and gas of this well in the next 20 years.