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黑帝庙次凹葡萄花油层是目前松辽盆地南部油气勘探的重点层系,对其油源条件、油气成藏机理及模式进行了研究。油源对比结果表明,黑帝庙次凹葡萄花油层的油气主要来自嫩一段烃源岩。通过分析来自嫩一段烃源岩的油气进入葡萄花油层的成藏机理,认为嫩一段油气“倒灌”运移进入葡萄花油层须同时具备2个基本条件:嫩一段烃源岩内存在超压和嫩江组沉积早期发育连通嫩一段烃源岩与葡萄花油层的油源断层。嫩一段烃源岩生成的大量油气在其内部超压作用下,通过断层向下运移至姚一段葡萄花油层。嫩江组沉积早期发育的断层的活动期与嫩一段生、排烃高峰期的良好匹配,成为来自嫩一段烃源岩的油气在黑帝庙次凹富集成藏的关键因素。研究区油气成藏主要受嫩一段烃源岩内部超压、断层输导体系及姚一段砂体分布的控制,形成新生古储一断层输导一岩性圈闭的成藏模式,具备形成断层一岩性及岩性油藏的有利条件。
The reservoir of HeiDuMiao sub-concave Putaohua is the key reservoir of oil and gas exploration in southern Songliao Basin, and its oil source conditions, hydrocarbon accumulation mechanism and model are studied. The results of oil source comparison show that the oil and gas of the Putaohua oil layer in Heimiao Miao mainly comes from the Nende section of source rock. By analyzing the hydrocarbon accumulation mechanism of Putaohua reservoir from the first member of the Nenjiang Formation, it is considered that there must be two basic conditions for the migration of the first member of the Nentianyuan Formation to the Putaohua reservoir: the overpressure And the Nenjiang Formation early developed sedimentary connectivity Nen a source rock and Putaohua oil source fault. A large number of oil and gas generated from the first source rock under its internal overpressure, through the fault down to Yao a section of Putaohua. The Nenjiang Formation early well-developed faulting matches well with the Nende 1 formation and the hydrocarbon expelling peak, which is the key factor for the hydrocarbon accumulation in the Nenti-Miocene subfacies. The hydrocarbon accumulation in the study area is mainly controlled by the internal overpressure of the first source rock in the first member of Nenjiang and the distribution of faults in the fault system and the distribution of the sand body in the first YAO member. The formation of a new paleo-reservoir- fault- A lithologic and lithologic reservoir of favorable conditions.