聚合物驱油藏浓度分布与变化

Concentration distribution and variation in a polymer-flooding reservoir

利用以前的成果研究了注聚合物油藏的聚合物浓度变化 ,建立了考虑聚合物的浓度扩散和对流以及吸附因素影响的地层注聚合物的不稳定流动模型 ,简化模型以使其更接近油藏实际流体流动情况。并且对于非线性吸附采用组合变量和解析迭代方法进行求解。过程中 ,对于非线性吸附和线性吸附 ,绘出浓度曲线 ,确定聚合物浓度随时间和离井简距离的分布和变化 ,以此用于计算地层中的阻力系数和压力分布 。

The distribution and variation of the polymer concentration in a polymer flooding reservoir have been investigated using previous results. An unsteady flow model for a flooding polymer formation was then developed by considering the effects of polymer diffusion, conduction and adsorption. The model was simplified to make it more practical for fluid flow in the reservoirs and was then solved by combing variables with an analytic iterative process for the nonlinear adsorption. Concentration curves were drawn for nonlinear and linear adsorption in the process. The distribution and variation of the polymer concentration with distance and time from the wellbore were determined to calculate the resistance factor and the pressure distribution in the formation. The polymer flooding front has the significance for the flow of the injected polymer and the effective time for flooding oil wells.