提高特高含水期油田剩余油描述精度的方法

摘要

提高特高含水期油田剩余油描述精度是油藏工程师追求的目标.为此,采用"模式预测绘图法"绘制沉积相带图,提高储层描述精度,深化了储层平面非均质性认识;通过建立精细构造模型,深化了断层分布特征认识;通过实现精细地质研究成果数字化,建立相控+岩控的三维地质模型,提高了地质模型精度,深化了储层空间非均质特征的认识:综合应用精细地质研究成果、取心井资料、监测资料、分层注水资料以及新井和油水井动态资料实施油藏精细数值模拟,提高了数值模型精度,深化了油水分布特征的认识.从而实现了精细描述和研究剩余油分布,进一步提高了剩余油描述精度.%Reservoir engineers are always searching for method to improve the description accuracy of remaining oil distribution for extra-high water cut oilfield. Sedimentary facies map drawn by" model prediction mapping" could improve reservoir description accuracy and help better understand horizontal heterogeneity of reservoir formation; fine structure model could better understand fault distribution characteristics; digitization of fine geological research result and 3D geological model with facies and lithology controlling could improve model accuracy and deepen understanding for heterogeneity of reservoir space; integral fine reservoir numerical simulation with fine geological research result, coring well data, monitoring data, layered water injection data and dynamic data of new wells and oil-water wells improves accuracy of numerical simulation and deepens understanding oil-water distribution characteristics. Remaining oil description accuracy is further improved by fine description and research for remaining oil distribution.