青城凸起中生界内幕断层及油气运聚特征  

Faulted structure and its effect on oil-gas reservoir forming in Qingcheng arch

作　　者：康晏[1] 邹灵[1] 刘志勇[1] 韩敏[1] 卢浩[1] 姚树青[1] 

机构地区：[1]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2014年第6期45-48,114,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"大型油气田及煤层气开发"子课题"济阳坳陷油气富集机制与增储领域"(2011ZX05006-003)

摘　　要：针对青城凸起断裂系统复杂,油气运聚成藏规律认识不清的问题,在研究高青—平南断层连通性以及中生界主要断层封闭能力和输导能力的基础上,对高青地区油气运聚特征进行模拟。结果表明,高青—平南断层整体具有良好的输导能力,而中生界内幕断层平均连通概率均小于0.6,整体输导能力较差,油气主要沿断层—砂体进行垂向、侧向运移。高青地区油气优势运移路径为沿高青断层向西、西南方向运移;油气运移指向主要受构造形态和砂体控制,油气沿断层和骨架砂体向鼻状构造脊部运移,运移距离受北东向鼻状构造控制,而构造脊部的西侧地层西倾,油气无法沿骨架砂体继续运移。因此,在高15—高52—高46井南北向鼻状构造带油气运移通畅,是有效的含油带。Aiming to solve problems about complex faulted structure and rule of oil-gas migration and accumulation, we have studied the fault connecting properties in Qingcheng arch and the Mesozoic key faults' ability to plug or transport hydrocarbon. Based on the study, the numerical simulation has been carried out on oil migration and accumulation, finding that Mesozoic dominant migrating pathways are westward and west-southward along the Gaoqing fault. The direction of oil-gas migration is mainly controlled by structure modality and reservoir sandstones. Oil and gas migrate to the back of structure nose along the fault and sandstones and the migration distance is controlled by the structure nose with a northeast strike. However, it is difficult for oil and gas to keep on migrating to the west because the western side of strata is inclining to the west. So, oil and gas can migrate easily on the west of the nose structure along the Gao15 well-Gao52 well-Gao46 well in Mesozoic, which means this area is an effective petroliferous area. Thus we can know the direction of oil and gas migration and the development area of trap as well as the characteristics of Mesozoic reservoirs.

关 键 词：断层特征 断层连通性 优势运移路径 油气运聚数值模拟 青城凸起 

分 类 号：TE111.2[石油与天然气工程—油气勘探]