严重非均质油藏高含水期剩余油分布研究进展

目前，我国东部大多数油田在经过长期注水开发后己进入高－特高含水采油阶段，但油藏内仍然有约５０％的可采储量，它们的分布日趋分散、复杂，开采难度越来越大，其中一个最主要的原因是油藏（或储层）的严重非均质性，文章对国内外剩余油分布状况进行了详细分析。针对我国东部老油田的开发现状，从开发地质的角度出发，详细论述了严重非均质油藏剩余油分布及其动态预测的研究内容和方法，并指出了相应的研究思路和技术关键。重建适合开发后期的具有预测功能的储层地质模型，对稳定东部，改善油田开发效果，提高油田最终采收率具有重大的意义。

STUDIES OF REMAINING OIL DISTRIBUTION AND PERFORMANCE PREDICTION AT HIGH WATER-CUT STAGE IN SERIOUSLY HETEROGENEOUS RESERVOIRS

At present,most of eastern oil-fields in China has entered into a high water-cut stage after water injection for many years. There are about 50% recoverable reserves remained in reservoirs. The remaining oil is distributed discretionally and difficult to be recovered. Reservoir heterogeneity is one of the most important reasons.The domestic and international studies on remaining oil distribution are analyzed.A comprehensive approach to study the distribution and performance prediction of remaining oil in highly heterogeneous reservoir is proposted according to the development of easter oil-fields in China. Results show that this method can be applied to improve the development effect and raise final oil recovery.