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为了开辟后备油气基地,选取南黄海盆地南部坳陷内典型地震剖面进行构造演化分析,并结合成藏要素和成藏条件分析构造演化对二叠系油气成藏的影响,认为晚古生代以来的多期构造演化控制了二叠系油气成藏过程,使研究区东部和中西部发育不同成藏模式.研究结果表明:南部坳陷晚古生代以来共经历了4期构造演化过程;研究区东部二叠系烃源岩仅发生过1次生烃,中西部可能存在2次生烃;油气主要通过断裂和不整合面向周围圈闭运移;古近纪Ed—Es阶段构造活动剧烈,是圈闭的最终定型期,也是早期所形成油气藏的强烈改造时期;主要存在3种有利油气成藏模式.受构造演化和古地温梯度综合控制,研究区东部应重点寻找二叠系自生自储油气藏,而中西部应将二叠系生-中生界储、二叠系生-新生界储以及二叠系自生自储油气藏作为有利类型.
In order to open up a backup oil and gas base, the tectonic evolution of the typical seismic profile in the southern southern South Yellow Sea Basin was selected. Based on the analysis of the factors of tectonic evolution and hydrocarbon accumulation in Permian reservoirs, The tectonic evolution controlled the process of Permian hydrocarbon accumulation and developed different accumulation modes in eastern and central western China.The results show that the southern depression experienced four tectonic evolution since the Late Paleozoic. Only one hydrocarbon generation occurred in the source rocks and two hydrocarbon generation in the central and western China. Hydrocarbons mainly migrated to the surrounding traps through faults and unconformities. In the Paleogene Ed-Es stage, tectonic activity was intense and trapped The final setting period is also a period of intense reformation of early-formed reservoirs, and there are mainly three favorable hydrocarbon accumulation modes: controlled by tectonic evolution and paleo-geothermal gradient, the eastern Permian should focus on finding the Permian self-reservoirs, In the Midwest, Permian Mesozoic-Mesozoic reservoirs, Permian-Cenozoic reservoirs and Permian spontaneous self-reservoirs should be favored.