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辽河油田东部凹陷中南段Es1/Es3上不整合面对油气运聚成藏具有重要控制作用。根据不整合的成因机制、不整合上下界面地震反射终止方式、不整合的发育部位及剖面形态以及地层的尖灭线等特征,研究区内的不整合分为超覆不整合、削截不整合及平行不整合3种类型。不整合在纵向上具有明显的三层结构,即底砾岩、风化粘土层和半风化淋滤带。不同区域三层结构岩性有所差别。不整合在平面上分布具有差异性和有序性,这对不同类型油气藏的分布和成藏模式具有重要控制作用。
The upper unconformities Es1 / Es3 in the central-southern section of eastern depression of Liaohe Oilfield play an important role in controlling hydrocarbon migration and accumulation. According to the mechanism of unconformity, the discontinuity of unconformity of upper and lower seismic reflection, the unconformity of developmental site and profile, and the pinchout of strata, the unconformities in the study area are divided into overconformity unconformity, truncation unconformity And parallel unconformity three types. Unconsolidation has a clear three-layer structure in the longitudinal direction, ie, base conglomerate, weathering clay layer and semi-weathering leaching zone. The lithology of the three-layer structure in different regions is different. The distribution of unconformities in the plane is different and orderly, which plays an important role in controlling the distribution and reservoir forming patterns of different types of reservoirs.