聚合物驱非牛顿牛顿双区试井模型压力分析

Well Test Model of the Pressure Analysis of Dual Zone of Non Newtonian/Newton with Polymer

聚合物过程中实际上存在非牛顿—牛顿双渗流区,内区为聚合物波及区,可以看作非牛顿流体,外区为聚合物未波及区,可以看作牛顿流体。在不考虑和考虑非牛顿—牛顿双渗区交界面阻力两种情况下,建立了非牛顿牛顿双渗流区试井复合模型,通过数值求解,给出了聚合物驱渗流的试井解释图版。实例应用表明,该聚合物驱解释方法及试井图版,为合理解释聚合物驱条件下的地层参数、定量评价聚合物驱效果提供了理论和技术支持。

Double flowing zones of Non Newton and Newton appear in polymer process,while,internal area is polymers affected area,regarded as a non Newton fluid,and external is extracellular polymer unswept area,be seen as the Newton fluid.Under condition of considering and not considering the non Newtonian Newtonian dual permeability zone interface resistance of two kinds of circumstances,a composite testing model of double flowing zones of non Newtonian/Newton is built.By numerical solution,the test of polymer flooding percolation interpretation chart is given.The examples show that the method and test chart of the polymer flooding provide theoretical and technical support for reasonable explanation of the formation parameters,quantitative evaluation of polymer flooding effect under the condition of polymer flooding.