Abstract: According to the reservoir-formation mechanism,exploration situation and potential hydrocarbon resources,the geologic distribution of reservoirs in the fault basins of Jizhong Paleocene and Erlian Early Cretaceous periods were analyzed.In the course of complex geologic evolution,three elements of the fault basin including "sedimentary evolution-sedimentary facies-reservoir facies","structural zone-temperature-pressure field-hydrocarbon potential" and "transporting system" were gradually adjusted from the dynamic variation to the static equilibrium.Under the particular geologic condition and 3-dimensional space,six types of relative independent "complex transporting system" were constituted,including fault,ladder-shape,grid,plane,sitting chair and fissure types.Various complex reservoirs or complex reservoir zones were generated in fault basin.This reservoir model is the facies-potential-transport ternary reservoir model.The ternary reservoir model controlled rigorously the regular distribution,enrichment degree and exploration prospect of hydrocarbon in the rich oil trough.

Key words: Jizhong Depression, Erlian Basin, fault basin, sediment characteristic, complex transporting system, ternary reservoir model, reservoir distribution

摘要： 依据冀中坳陷古近纪和二连盆地早白垩世断陷盆地的沉积演化、沉积相类型、成岩演化、储层特征、构造特征以及油气藏的成藏机理、勘探现状和油气资源潜力,分析了断陷盆地油气藏的地质分布规律。在长期而复杂的地质演化过程中,断陷盆地"沉积演化-沉积相-储集相"、"构造带-温压场-油气势"与"输导体系"三要素由动态变化逐渐调整到静态平衡,从而在特定的地质条件下和三维空间中构成了断阶式、梯形、网格式、平面式、座椅式和裂隙式6类相对独立的"复式输导系统",形成了各具特色的复式油气藏或复式油气聚集带,即"相-势-导"三元成藏模式。它们严格控制着富油气洼槽油气藏的规律分布、油气富集程度及勘探前景。

关键词: 冀中坳陷, 二连盆地, 断陷盆地, 沉积特征, 复式输导系统, 三元成藏模式, 油气藏分布