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为深化辽河西部凹陷曙光—雷家地区隐蔽油气藏勘探,根据油气勘探研究成果,结合隐蔽油气藏的分类,将研究区的隐蔽油气藏划分为前新生代潜山油气藏和古近系特殊岩性体油气藏两类。其中:前新生代潜山油气藏包括太古宇潜山油气藏,中、上元古界潜山油气藏及中生界潜山油气藏;古近系特殊岩性体油气藏包括碳酸盐岩油气藏,火山角砾岩油气藏及玄武岩油气藏。在综合研究曙光—雷家地区的地质背景、油气成藏条件及成藏过程的基础上,认为该区具有形成隐蔽油气藏优越的地质条件,如多期的构造运动、复杂的构造背景、充足的油源条件、封闭性良好的盖层和畅通、多样的油气疏导体系等。基于成藏动力学系统理论,探讨了隐蔽油气藏的动力学特征,确定古近系特殊岩性体油气藏属于自源封闭型成藏动力学系统,前新生代潜山油气藏属于它源半封闭型成藏动力学系统。研究结果表明,这两类隐蔽油气藏具有匹配良好的生烃、储层、盖层、圈闭、运移、聚集的石油地质动力学特征。
In order to deepen the exploration of subtle reservoirs in the Shuguang-Leijia area of western Liaohe depression, according to the results of oil and gas exploration and research, combined with the classification of subtle reservoirs, the subtle reservoirs in the study area are divided into the Pre-Cenozoic buried hill reservoir and Paleogene special rocks Two types of body oil and gas reservoirs. Among them, the Pre-Cenozoic buried hill oil and gas reservoirs include the Archean buried hill reservoirs, middle and upper Proterozoic buried hill reservoirs and the Mesozoic buried hill reservoirs. The Paleogene special lithologic reservoirs include carbonate rocks Reservoirs, volcanic breccia reservoirs and basalt reservoirs. Based on the comprehensive study of the dawn - the geological background of Leijia area, the conditions of hydrocarbon accumulation and the process of hydrocarbon accumulation, it is considered that this area has the superior geological conditions for forming subtle reservoirs, such as multi-period tectonic movement, complex tectonic setting, Oil conditions, a good seal of the cover and smooth, diversified oil and gas drainage system. Based on the theory of reservoir dynamics system, the dynamic characteristics of subtle reservoirs are discussed. It is confirmed that the Paleogene special lithologic reservoirs belong to the self-sourced closed-type reservoir forming dynamic system. The former Cenozoic buried hill reservoir belongs to its source and a half Closed-type reservoir dynamics system. The results show that these two types of subtle reservoirs have the characteristics of well-matched hydrocarbon geodynamics such as hydrocarbon generation, reservoir, cap rock, trapping, migration and accumulation.