摘要
“油气保存单元”是一个盆地内部三度空间上封闭流体的含油气地质单元。根据其空间结构特点与随时间的演变特征可以将油气保存单元划分为继承型、改造型与重建型等 3种基本类型。通过对封盖层和断层的封闭性能与封闭时间的匹配分析 ,以及对岩浆活动、地震活动与水文地质作用等关键事件的研究 ,可以划分油气保存单元。结合盆地与含油气系统的研究成果 ,可以深入剖析油气保存单元内部的成藏要素与成藏作用 ,从而对其进行综合评价。以楚雄盆地为例 ,通过对 7个油气保存单元的分析与评价 ,优选出东山、中和 -大姚与永仁等 3个有利的油气保存单元。
A thorough understanding of seals is needed for petroleum exploration in marine carbonate strata in Tarim basin, Ordos basin and southern China. A concept of ″petroleum preservation unit″ is presented. It is a petroliferous geological unit with fluids being sealed in 3D space within a sedimentary basin. According to their spatial structures and evolution in geologic history, hydrocarbon preservation units can be classified into three basic types,succession,modification and reconstruction types.Hydrocarbon preservation unit can be delineated based on analysis of cap rocks, sealing capacity and sealing time of faults,as well as some key events,such as volcanic activities, earthquake and hydrogeological process.In combination with the study of basin and petroleum system,pool-forming elements and processes can further be analysed,and comprehensive evaluation of hydrocarbon preservation units can then be made.In the case of Chuxiong basin,seven hydrocarbon preservation units have been analyzed and evaluated,and Dongshan,Zhonghe-Dayao and Yongren have finally been selected to be the three favorable hydrocarbon preservation units.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2004年第1期1-8,共8页
Oil & Gas Geology
关键词
封盖层
断层封闭性
油气保存单元
综合评价
seal
fault′s sealing capacity
hydrocarbon preservation unit
comprehensive appraisal
