辽西凹陷古潜山内幕结构与成藏条件分析

潜山构造是中国东部中、新生代断陷盆地中油气非常富集的一类特殊基底构造，但潜山内幕结构与油气圈闭和成藏条件的关系研究目前仍很薄弱。作者以辽西凹陷潜山带为研究对象，从潜山内幕断层构造格局和活动期次、地层岩性和产状、潜山地貌单元划分和展布格局、潜山圈闭类型和烃源条件以及油气运移和聚集成藏地质条件等多个角度，论述古潜山内幕结构与成藏条件的关系，将古潜山油气藏圈闭划分为古地貌和潜山内幕地层圈闭两大类，建立了油气运移具有先自上而下倒灌，再沿不整合面由低潜山带至中潜山带侧向运移注入潜山聚集成藏的“新生古储”成藏模式，为辽西凹陷潜山带深层油气勘探领域提供了依据。

Analysis of internal structure and reservoir-forming conditions of palaeo-buried hill, Western Liaohe Sag

Structural belt of buried hill is a building unit which shows great concentration of hydrocarbon in eastern-China faulted basin, but the research of the relationship between buried hill and hydrocarbon trap is still weak. Taking the buffed hill belt of western Liaohe Sag as a research target, this paper expounds the internal structure of buffed hill and the control action of accumulation from various aspects, including structural framework and active phases of inner buried hill, formation lithology and attitude, morphological unit classification and distribution framework, trapping types and hydrocarbon source conditions,hydrocarbon migration and accumulation conditions. The hydrocarbon trap is divided into palaeogeomorphology reservoir and stratigraphic hydrocarbon reservoir of inner buried hill. It establishes the "new source and old reservoir" hydrocarbon accumulation that the hydrocarbon migrates from top to bottom, then parallel migrates from low to medium buffed hill along unconformable face, at last fills in buffed hill and forms the reservoir. The hydrocarbon accumulation model provides references for deep exploration activity of buried belt in Liaohe Sag.