非牛顿流体在多孔介质中的非稳态流动

STUDIES ON TRANSIENT FLOW OF NON-NEWTONIAN FLUIDS THROUGH POROUS MEDIA

以聚合物驱油为背景，对幂律非牛顿流体在不稳态渗流时的压力特性进行了理论研究，建立了其渗流方程，通过拉氏反演，得到了在地层各点和井底处拉氏空间的压力解，并经数值反演，得到了井底处在实空间的压力解，并给出了压力理论曲线，同时也给出了不稳定试井分析方法，用此方法可求得地层的有效流度及符合矿场情况的幂律指数ｎ，可用于研究非牛顿流体的不稳态渗流特性和处理注聚合物时的试井问题。

On the background of polymer flooding , we have studied the transient flow behaviorsof power-law fluid through porous media. The linear form of the new fundamental equationwas established and solved by the Laplace transform method. The solutions to pressure atvarious location of reservoir and at well hole bottom in Laplace space were obtained.Thepressure behavior at well hole bottom and the theoretical curves of dimensionless pressure vsdimensionless time were given while the well-test interpretation methods were introduced.Effective mobility and actual power-law index n may be derived.he interpretative methedsgiven are applicable to polymer flcoding because the current polymer solutions used in oilfield usually serve as power-law fluid.