海陆过渡相块状砂岩油藏“内嵌”夹层对开发效果的影响及开发技术对策

Impacts of "embedded" beds within a massive sandstone oil reservoir of continental-oceanic transitional facies on its development effect and related countermeasures

厚层砂岩"内嵌"夹层是海陆过渡相块状砂岩油藏的典型地质特征,并且是影响该类油藏油水运动规律的主要因素之一。将珠江口盆地LFY13-1油田Z25油藏砂体"内嵌"夹层归纳为4种模式,分析了不同"内嵌"夹层模式对油藏开发效果的影响,据此提出了充分利用砂体"内嵌"夹层分布特点的开发技术对策,并成功地指导了一批调整井的部署。

The ＂embedded＂ beds are geologically typical within a massive sandstone oil reservoir of continental-oceanic transitional facies,and they are one of the major factors to influence oil and water movements within such reservoirs.Four patterns of ＂embedded＂ beds have been recognized within Z25 sandstone reservoir in LFY13-1 oilfield,Pearl River Mouth basin,and their impacts on development effects of the reservoir are analyzed.According to the resulted knowledge,the technical countermeasures to fully employ the ＂embedded＂ beds have been presented for developing this reservoir,and locating a batch of adjustment wells has been successfully guided in the oilfield.