多层砂岩油藏层内纵向非均质性表征方法探索

提出了基于拟相对渗透率曲线的层内纵向非均质性表征方法。根据具有区域代表性的岩芯规模的相对渗透率曲线计算出任意测井分度点的相对渗透率曲线； 基于层状砂岩油藏动力拟函数的思想， 计算出井点小层产层规模的动力拟相对渗透率曲线； 研究了岩芯规模的相对渗透率函数与产层规模动力拟相对渗透率函数之间的关系； 采用插值方法得到井间任意网格动力拟相对渗透率曲线； 最后采用等效含水率方法对油藏模型任意网格的原始相对渗透率曲线进行端点标定， 确定不同区域的动力拟相对渗透率曲线。采用上述方法对海上 M 油田 X 井组进行了历史拟合， 与传统数值模拟方法相比， 该方法历史拟合程度更高， 更能精确地描述非均质性储层综合驱替特征。

Exploration on Reservoir Heterogeneity Characterization in ReservoirNumerical Modeling of Multi-Substratum Sandstone Reservoir

A new method on reservoir heterogeneity characterization in reservoir numerical modeling is presentedbased on end point scaling of pseudo-relative permeability. The relative permeabilities of each point of well logaround accuracy rating are first calculated from the relative permeability， which arises from core flooding tests.Thus the pseudo relative permeability of a substratum consisting of many well log points around accuracy rating isobtained. The function relation between pseudo relative permeability of a substratum and relative permeability fromlabs is studied， which stimulated the presentation of relative permeabilities of all cells among wells in reservoir nu-merical modeling. The amount of relative permeability of all cells is determined from reservoir numerical simulator.It has been proved that flow characteristic of oil-water two phases in layered sandstone reservoir could be modelingmore accurately based on the above method.