提高特高含水期油田剩余油描述精度的方法

METHOD TO IMPROVE THE DESCRIPTION ACCURACY OF THE REMAINING OIL IN EXTRA-HIGH WATER CUT OILFIELD

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 re- search 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 distribtion.