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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。
The buried hill structure is a special type of basal structure rich in oil and gas in the Mesozoic and Cenozoic rift basins in eastern China. However, the relationship between the buried structure and the hydrocarbon accumulation and trapping conditions is still weak. Taking the buried hill belt of western Liaoning depression as the research object, the author studied the fault structure and active period, the lithology and occurrence of the strata, the unit division and distribution pattern of the buried hill, the trapped type of the buried hill and hydrocarbon source conditions Oil and gas migration and accumulation of reservoir forming geological conditions and other angles, discussed the relationship between buried hill structure and reservoir forming conditions, the buried hill reservoir can be divided into paleogeomorphology and buried hill inside stratum trap two categories, A new model of hydrocarbon accumulation in the “newborn paleocapacity” that has been injected into the buried hill along the unconformity from the top to the bottom of the unconformity is established. It provided the basis for deep oil and gas exploration in the buried hill area of western Liaoning depression.