南鄱阳凹陷油气系统分析及勘探前景

综合分析了南鄱阳凹陷生、储、盖等基本油气地质条件,选取有代表性的地震解释剖面、钻井剖面,建立64个一维虚拟点,以盆地模拟为手段,按照动态、正演方式,进行油气系统研究.依据油气聚集区-主力烃源岩-主要储层-主要成藏期(可靠级别)的系统命名原则,认为存在南鄱阳凹陷—P1,P2—P,K3—K3～E(潜在的)再生烃油气系统.并对系统中的油气生成、运聚、保持、破坏过程进行了阐述,辅以相应的油气显示佐证,并分别计算了印支期、燕山期、喜马拉雅期的生烃量.在油气系统研究的基础上,结合已钻探井失利原因分析,进行勘探评价.

Analysis of petroleum system in Southern Poyang Sag and its exploration potential

The geological conditions of Southern Poyang Sag, such as source, reservoir and cap, are synthetically analyzed. Sixty four one dimensional virtual points are built up from representative seismic section and drilling section, and the petroleum system of Southern Poyang Sag is studied based on the quasi 3D basin modeling which emphasizes dynamic and forward simulation. It is held that there is a hydrocarbon regenerating petroleum system, which is named as Southern Poyang Sag—P 1,P 2—P, K 3—K 3~E (potential) according to the nomenclature of hydrocarbon accumulation zone—main hydrocarbon source rocks—main reservoirs—important pool formation stages (reliable grade). The process of the generation, migration, accumulation, conservation and destruction of the hydrocarbon in the petroleum system is discussed, which is verified by oil and gas shows. The hydrocarbon production in Indosinian epoch, Yanshan phase and Himalayan phase is separately predicted. The exploration potential of Southern Poyang Sag is evaluated based on the study of the petroleum system and the analysis of the causes of drilling failure in the past.