气藏水平井产能预测数值模拟研究

根据气藏内气体的流动模型和水平井筒内流体的流动模型,建立了气藏-水平井筒流体流动的耦合模型,充分考虑了2种流动的相互作用和影响。对气藏水平井的产能求解采用非稳态、拟压力模型,考虑了气藏内的各向异性和气体的非达西流动,通过实例计算表明,应用水平井技术可提高低渗气藏产量。

Numerical Simulation Study of Off- Take Potential of Horizontal Well in Gas Reservoir

The horizontal well technology has good foreground in oil and gas deve lopment. At present horizontal well has been applied in low permeable gas field, so the research of horizontal well off-take potential has great significance in improving the efficiency of exploitation. According to the gas flow model in re servoir and the flow model in horizontal well tube, the coupling flow model of r eservoir-horizontal well tube is built. The reciprocity and the effect of the tw o flows are considered. The paper uses unsteady state model in gas reservoir and considers the anisotropy in reservoir and the non-Darcy flow of gas. Pseudo-pre ssure is used in the calculation.