复杂边底水油藏地层压力预测和调控研究

Research on the Formation Pressure Prediction and Regulation of Complex Edge-bottom Water Reservoir

位于渤海西部海域的曹妃甸油田受构造和储层的双重制约,油水系统十分复杂,主要发育底水油藏,次之以底水为主的边底水油藏。准确判断边底水在生产过程中对储层压力的影响规律是提高该油藏开发效果的关键。以曹妃甸11-6油田为例,针对多砂体复杂交错的边底水油藏,利用地质建模技术建立构造、岩性和物性模型,并通过数值模拟技术,挖掘边底水对地层压力和井间连通性的影响规律,有助于对边底水油藏有深入的了解,并为油藏开发方案设计提供辅助性依据。

Caofeidian Oilfield,located in the western Bohai Sea,is constrained by both the structure and the reservoir.The oil-water system is very complicated.Bottom water reservoirs are mainly developed,followed by edge-bottom water reservoirs dominated by bottom water.Accurately judging the influencing regularity of edge-bottom water on the reservoir pressure during production is the key to improving the development effect of this reservoir.In this paper,with Caofeidian 11-6 oilfield as an example,the structure,lithology and physical property models are established by geological modeling technology for the complicated interleaved edge-bottom water reservoir with multiple sand bodies.And through numerical simulation technology,the influence law of edge-bottom water on formation pressure and interwell connectivity is explored.This helps to have a deep understanding for the edge-bottom water reservoir,and provides an auxiliary basis for the design of reservoir development plan.