哥伦比亚D区块油藏类型及成藏控制因素

The Reservoir Type and Main Control Factors on Hydrocarbon Accumulation in Block D of Columbia

在亚诺斯盆地区域地质认识的基础上,通过分析构造特征、地层展布规律、圈闭类型和油气分布特点,对哥伦比亚D区块内的油气成藏特点、富集规律及成藏控制因素进行了深入研究。结果表明:油气运移方式决定成藏层系,断层展布控制油气分布,断鼻构造利于油气聚集,圈闭类型及储层物性制约油气富集;渐新统卡沃内拉组是研究区主要的成藏层系,卡沃内拉组七段为主要输导层,上覆卡沃内拉组五段、三段为主要储集层;区内共发育断鼻、岩性-断鼻、岩性-断层和断层-岩性等4种油藏类型。

On the basis of regional geological understanding of Ilanos Basin,the reservoir forming characteristics,accumlation law and controlling factors of reservoir forming in Block D of Colombia were researched by analyzing structural features,stratigrahic distributive rules,trap types and hydrocarbon distribution.The result shows that reservoir forming strata are determined by the mode of hydrocarbon migration,hydrocarbon distribution is ctrolled by the fault distribution,faulted nose-like structure is favorable for hydrocarbon accumlation,hydrocarbon enrichment is restricted by trap types and reservoir properties.Carbonera Formation is the main of Oligocene is the main reservoir forming stratum in the studied area,the 7th member of Carbonera Formation(E3c7)is the main transport layer,and E3c3,E3c5 are the main reservoirs.Four kinds of reservoirs such as faulted nose-like structure,lithology-faulted nose-like structure,lithology-fault and fault-lithology are developed in the area.