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渤中坳陷东营组沉积期以来快速沉降和强烈断裂活动的地质背景导致其呈现出不同于渤海湾盆地其他地区的油气成藏特征.凹陷周缘凸起带成为油气聚集的主要场所,输导体系的分布与演化控制了油气运移和成藏.在阐明渤中坳陷大型油气系统烃源岩和油气分布规律的基础上,综合利用多种资料分析了各类潜在输导通道的发育特征及其空间配置,识别出断裂主导型、砂体主导型和不整合主导型3类控藏输导体系.凸起边缘继承性的长期断层充当了垂向流体释放和油气运移的主输导通道,控制了凸起带上新近系储集层中的油气聚集.特别是在构造活跃期,开启的长期断层成为油气快速垂向运移的首选通道.古近系沙河街组和东营组的连通性砂体与活跃烃源岩直接接触,不仅是早期油气运移和聚集的主要场所,也是晚期油气运移和聚集的始发站.因此,它们不仅控制了古近系圈闭的油气聚集,同时在很大程度上直接控制了凸起带新近系圈闭的油气供给.不整合T8是中生代末区域构造变革的产物,其渗透性因风化作用而得以提高,充当了深部侧向油气运移的输导通道,控制了潜山储集层中的油气成藏.3类输导体系对油气成藏的时间、部位、速率和规模等都具有不同程度的影响,但断裂主导型输导体系的控制作用最为显著.
The geologic setting of the rapid settlement and intense faulting activity of the Dongying Formation in the Bozhong Depression since the sedimentation of the Dongying Formation led to its hydrocarbon accumulation characteristics different from those in other areas of the Bohai Bay basin.The protruding belts on the periphery of the depression became the major sites for oil and gas accumulation, The distribution and evolution of oil and gas migrate to control the hydrocarbon migration and accumulation.On the basis of elucidating the source rocks and oil and gas distribution laws of large-scale hydrocarbon systems in the Bozhong Depression, Its spatial configuration identified three types of fault-dominant, sand-body-dominant and unconformity-led reservoir-controlling systems: the long-standing faults with raised margins act as the main conductor of vertical fluid release and hydrocarbon migration , Controlling the hydrocarbon accumulation in the Neogene reservoirs on the raised belt, especially in the active tectonic period, and the long-term open fault has become the preferred channel for rapid vertical migration of the oil and gas.Communication between the Paleogene Shahejie Formation and the Dongying Formation The direct contact between the sand bodies and the active source rocks is not only the main site for the early hydrocarbon migration and accumulation but also the origin station for the late migration and accumulation of hydrocarbons.Therefore, Trapped oil and gas accumulation, and to a large extent directly controlled the oil and gas supply of the Neogene traps in the uplift zone. Unconformity T8 is the product of the structural evolution in the end Mesozoic and its permeability is enhanced by weathering, acting as a The conduction channel of deep lateral oil and gas migration controls the accumulation of oil and gas in the buried hill reservoirs. The three types of transport systems have different degrees of influence on the time, location, velocity and scale of hydrocarbon accumulation The dominant role of the fault-oriented control system is the most significant.