Influence factors for tapping positive rhythm thick oil reservoir potential with horizontal wells 水平井挖掘正韵律厚油层潜力影响因素分析
This paper studies the relationship between improved recovery efficiency of positive rhythm reservoir with different heterogeneity variation factor and the polymer injection amount , and calculates the economic index of different polymer injection amount by using polymer flooding economic model 本文研究了正韵律不同非均质变异系数油层采收率提高值与聚合物用量的关系,并利用聚合物驱经济模型计算了不同聚合物用量下聚合物驱油的经济指标。
Research section braided distributary channel sandstone is mostly positive rhythm , and high porosity and seepage rate in its central - top section , low seepage rate kalk interbed in its bottom . underwater distributary channel sandstone is relatively homogeneous positive rhythm , high porosity and seepage rate in its bottom , its top low . distributary mouth bar sandstone is complex rhythm , many interbeds inside 研究区宏观非均质性特点为:研究区辫状分流河道砂体以正韵律为主,高孔、渗带在砂体中上部,底部常存在低渗透率钙质夹层;水下分流河道砂体为较均质的正韵律,下部孔渗高,上部孔渗变小,分流河口坝砂体为复合韵律,砂体内部夹层多。