高浅南区明化镇组单砂体夹层对剩余油的控制作用

The Control of Interbed on the Remaining Oil of Monosandbody on Minghuazhen Formation of Southern Area of Shallow Strata of Gaoyou Depression

为了搞清高浅南区明化镇组内部夹层对层内剩余油的控制作用，更好地对层内剩余油进行开采。利用岩心资料和测井资料对夹层类型和发育特征进行研究，通过关键生产井资料和统计学方法研究不同侧积层与射孔井段的位置关系对剩余油的控制作用。明化镇组夹层主要为泥质夹层和物性夹层，两者都具有一定的倾角，平均约5°，属点坝砂体的侧积层，延伸范围在1～2个井距左右；同时还见有少量的钙质夹层，平行砂体顶面，主要发育在砂体的顶部和底部，延伸范围小于1个井距。在夹层的作用下，特别是具有一定倾角的侧积层作用下，高浅南区明化镇组单砂体内部剩余油发育4种分布模式：层内多段剩余油、顶部剩余油、中一下部剩余油和几乎无层内剩余油。

To clarify the intercalation control to the remaining oil in the interbeds of Minghuazhen Formation,and for better exploitation and development of the remaining oil there,core and logging date were first used to study the intercalation types and the development characteristics.The control of different locations of the interbed and perforating well to the remaining oil was studied.The main interbed types were muddy and the physical interbeds,and they all had a certain inclination and the average inclination was about 5°.They were the lateral accretion layers of point bar sand and its extension was about one to two well spacing.At the same time,there were a small amount of calcareous intercalations.And the calcareous interbeds were parallel to the top of the sand,it was mainly developed on the top and bottom of the sand,the extension was less than a well spacing.Under the influence of intercalations,there are four distribution patterns of the remaining oil in the monosandobies,such as the multi-segment remaining oil the top remaining oil,the middle-low part remaining oil and the almost no remaining oil in layers.