渤海湾盆地济阳坳陷车镇凹陷西部深层油气倒灌的物理模拟实验  

Physical modeling of petroleum downward migration:A case study of western Chezhen Sag,Jiyang Depression,Bohai Bay Basin

作　　者：郝雪峰[1] 单亦先[2] 劳海港[2] 

机构地区：[1]中国石油化工股份有限公司胜利油田分公司地质科学研究院,山东东营257015 [2]中国石油大学(华东),山东青岛266580

出　　处：《石油实验地质》2013年第1期87-91,共5页Petroleum Geology & Experiment

基　　金：国家重大科技专项(2011ZX05006)资助

摘　　要：以油气倒灌理论为指导,综合利用地震、地化、钻井、测井等资料,研究了渤海湾盆地济阳坳陷车镇凹陷西部油气倒灌的成藏机理。通过实验模拟油气在二次运移过程中以断裂(或微裂缝)为倒灌通道的过程,再现油气倒灌的形成过程。研究表明,Es3(中-下)亚段烃源岩与Es4(上)亚段油砂具有较好的亲缘关系,且Es4(上)亚段发现的油藏埋深大于Es3烃源岩底界埋藏深度;Es3(下)地层压力系数在1.0～1.4之间,向上和向下压力系数均逐渐减小,是油气倒灌的动力;裂缝与断裂是切穿Es3烃源岩底界与Es4顶部之间泥岩隔层、连接烃源岩与储集层的运移通道。According to the theory of hydrocarbon downward migration, based on seismology, geochemistry, well drilling and logging, it is discussed in this paper the accumulation mechanism of petroleum downward migration in the western Chezhen Sag, the Jiyang Depression, the Bohai Bay Basin. The main pathways of hydrocarbon downward migration include factures or micro cracks in the process of secondary migration, and the formation process of hydrocarbon downward migration is reproduced by experimental simulation. Source rocks in the middle and lower subsections of the 3rd member of the Shahejie Formation have good genetic relationships with oil sands from the upper subsection of the 4th member of the Shahejie Formation, and reservoirs discovered in the upper subsection of the 4th member of the Shahejie Formation are buried deeper than the bottom boundary of source rocks from the 3rd member of the Shahejie Formation. In the lower subsection of the 3rd member of the Shahejie Formation, pressure coefficients range from 1.0 to 1.4, and decrease both upwards and downwards, providing force for petroleum downward migration. Cracks and fractures break the mudstone interlayers between the bottom boundary of source rocks from the 3rd member of the Shahejie Formation and the top surface of the 4th member of the Shahejie Formation. As a result, source rocks and reservoirs are connected.

关 键 词：油气倒灌 油源对比 异常压力 运移通道 实验模拟 车镇凹陷 渤海湾盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]