启动压力和毛管压力对低渗透油田生产参数影响

The Effect of Starting Pressure and Capillary Force on Low Permeability Reservoir Producing Parameters

为解决低渗透油田生产参数变化与中、高渗透油田不同的问题 ,考虑油藏存在启动压力、毛管力、重力等因素情况下 ,推导了低渗透油田油水两相渗流时生产参数含水率、无因次采油指数、无因次采液指数的变化形式 ,并具体分析了 3种因素对生产参数的影响 ,指出毛管力和启动压力的存在增加了含水率 ,增加了无因次采液指数 。

Taking considerations of starting pressure, capillary force and gravity, the paper draws out the equations of water cut and dimensionless productivity index in the condition of water and oil flowing in low permeability reservoir, at the same time, analyses the effects of those factors. The paper points out that the existences of starting pressure and capillary force increase the water cut, make dimensionless liquid productivity index higher,have no effect on dimensionless productivity index.