松辽盆地南部黑帝庙次凹葡萄花油层油源条件及成藏机理  

Study on reservoir-forming mechanism of Putaohua reservoir in Heidimiao secondary depression,southern Songliao basin

作　　者：葛岩[1] 黄志龙[1] 唐振兴[2] 贺君玲[2] 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油吉林油田分公司,吉林松原138001

出　　处：《油气地质与采收率》2012年第3期25-28,112,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家油气资源战略选区专项"松辽盆地及外围上古生界油气资源战略选区"(XQ-2009-02)

摘　　要：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。Putaohua reservoir in Heidimiao secondary depression is one of the most important layer in Songliao basin,the paper analyzes the oil-source though oil-source correlation.The result of oil-source correlation shows that,the oil in Putaohua reservoir of Heidimiao secondary depression is mainly from K_2n_1 source rock.The migration and accumulation mechanism of oil from K_2n_1 to Putaohua reservoir is analyzed though two conditions in Putaohua reservoir.They are:①enough high overpressure,and②earliest of K_2n_1 faults connected K_2n_1 source rock and Putaohua reservoir.Oil from K_2n_1 source rock can migrate downward into Putaohua reservoir though earliest of K_2n_1 faults in the end of K_2n,K_2m sedimentary period under the action of overpressure.The favorable matching relationship between activity of Tl fault and the periods of hydrocarbon generation and expulsion is the key element making the oil come from K_2n_1 source rock,and then trapped in Putaohua reservoir.The oil migrated downward into Putaohua reservoir through the earliest of K_2n_1 fault under the action of overpressure.Hydrocarbon accumulation is controlled by fault and single sand body of K_2y_1,and based on the oil-source correlation,the character of structure and sediment,the pattern of younger source rock and older reservoir-fault migration system-lithologic reservoirs is summarized.

关 键 词：油源对比 成藏机理 葡萄花油层 黑帝庙次凹 松辽盆地 

分 类 号：TE112.31[石油与天然气工程—油气勘探]