濮卫环洼带东翼层序地层学研究

Research of Sequence Stratigraphy in East of Puwei Area

依据高精度层序地层学和储层沉积学原理,提出了本区基准面旋回识别与划分的5种岩性剖面标志和3种测井曲线类型,建立了层序划分方案和对比标准,根据旋回的概念,首次将濮卫环洼带东翼沙三—沙四段自下而上划分了5个中期旋回和23个短期旋回。研究表明:本区物源主要来自北部和南东方向,基底构造运动导致的掀斜作用可能是控制南北物源差异供给的主要因素之一,在旋回MSC3、MSC4期间,可容纳空间大,物源供应活跃,砂体发育,储层物性较好,是有利的滚动勘探开发目标。

On the basis of high-resolution sequence stratigraphy and reservoir sedimentology, this paper concludes the base level of drilling and (or) logging, the formation response feature and recognizing methods, and firstly divides the Es_3-Es_4 of eastern part of Puwei area into five intermediate cycles and 23 short term cycles from bottom to top. The research indicates that the source of this area is from the north and the south east, tilting effect caused by base structural movement maybe one of the main reasons which control the source difference between south and north. During the cycle of MSC3 and MSC4, this area has a big accommodation, abundant source, well developed sandbodies and better reservoir, it's the favorable target of rolling exploration and development.