塔里木盆地塔中低凸起:一个典型的复式油气聚集区

塔中低凸起是塔里木盆地中央隆起上的一个次级构造单元。多年的勘探开发实践表明,该地区具有多个产层,多种油气藏类型,多期油气充注;多种类型的油气藏垂向上复合叠置,横向连片成带,共同构成了一个典型的复式油气聚集区。塔中低凸起是继轮南低凸起之后,塔里木盆地又一个典型的复式油气聚集区。本文在概述区域构造的基础上,从烃源岩与油气充注、储盖类型与组合、油气输导系统、圈闭和油气藏类型等方面论述了该复式油气聚集区的重要特点,分析了油气成藏的主控因素。塔中复式油气聚集区证明:在渤海湾盆地油气勘探和研究实践中总结出来,并已经在中国东部和南部含油气盆地得到成功应用的复式油气聚集区的理论,对我国西部挤压型含油气盆地的油气勘探也具有重要的指导意义。

THE CENTRAL TARIM LOWER UPLIFT: A COMPOSITE HYDROCARBON ACCUMULATION PLAY IN THE TARIM BASIN, NW CHINA

The Central Tarim(Tazhong) Lower Uplift,a sub-unit of the Central Rise of Tarim Basin,is characterized with multiple productive reservoirs,various pool types and multi-phases of hydrocarbon generation,migration and filling to the pools.Superimposed in vertical and located one next to another in lateral,the pools of various types in the Central Tarim Lower Uplift constituted a typical composite hydrocarbon accumulation play.It was another typical composite hydrocarbon accumulation play in the Tarim Basin,similar to the Lunnan Lower Uplift,a sub-unit of the North Tarim Rise.The paper described the regional tectonics briefly,discussed the source rocks,oil-gas fillings,reservoir-cap associations,migration systems,traps and pool types,analysed the main controlling factors for the oil-gas pools,and sum up the main features of the Central Tarim composite hydrocarbon accumulation play.The petroleum geological theory of composite hydrocarbon accumulation play was inducted out from the petroleum exploration and development in Bohai Bay Basin,a rift depression in East China.It has been successfully applied in the petroleum exploration in the rift petroliferous basins in East and South China.The Central Tarim and Lunnan composite hydrocarbon accumulation plays demonstrated that this theory also has bright prospect of application and development in the compressive petroliferous basins in West China.