内蒙古二连盆地岩性圈闭早期形成和多期形成特征分析  

The Analysis on the Characteristics of Early Origin and Multi-period Forming of Lithologic Trap: Case Study of Erlian Basin, Inner Mongolia

作　　者：刘震[1] 梁全胜[1] 肖伟[1] 党虎强[1] 

机构地区：[1]中国石油大学石油天然气成藏机理教育部重点实验室,北京102249

出　　处：《现代地质》2005年第3期403-408,共6页Geoscience

摘　　要：根据盆地内部储层和盖层的临界条件,利用盖层排替压力曲线和储层物性曲线联合确定了岩性圈闭的发育层段,发现多个层位可发育岩性圈闭。如果盖层排替压力和储层物性随埋深的变化是按现今各曲线有规律地演化,则可以推测在盆地的埋藏早期就可以形成岩性圈闭,并且在演化过程中存在多个圈闭形成时期。二连盆地若干凹陷的实际资料也证实了岩性圈闭存在早期形成和多期形成的基本特征。岩性圈闭形成期与油气运聚史相结合对研究岩性圈闭成藏过程十分重要。According to the critical condition of reservoir and caprocks, the article makes use of the evolution curves of caprock entry pressure and reservoir porosity to fix the forming depth of the lithologic traps, and at the same time proves that the lithologic traps can form in several formations. If the entry pressure of caprocks and reservoir characters regularly evolute in accordance with the nowadays evolution curve, we can deduce that lithologic traps can form in early time and the traps have several forming periods. The realistic data of Erlian Basin prove that lithologic traps have the characteristics of early and muhi-period formations. The study of combining the forming times and the history of hydrocarbon migration and accumulation is important for the research on forming of lithologic traps.

关 键 词：盖层排替压力 储层临界物性 早期形成 多期形成 

分 类 号：TE122[石油与天然气工程—油气勘探]