摘要
对油气运移和聚集而言，裂谷盆地的断层可分为断面封闭型和岩性封闭型两大类；断面封闭型断层以断面（或断裂带）本身作为遮挡体或通道；岩性封闭型断层依靠对盘岩层遮挡或提供通道，根据断层的封闭能力，每大类还可分为完全封闭型、不完全封闭型和开启型３亚类，大断层以断面封闭型为主；小断层和大断层在浅层的分支断层都为岩性封闭型，但二者的油气分布特征有所不同。一盘为基岩的断层较在盖层内的断层的封闭能力低，断层活动有利于油气运移。
For hydrocarbon migration and accumulation,the faults in rift can be divided into fault-plane sealing and lithology sealing.The fault-plane(or fault zone)sealing fault is a barrier or passage for hydrocarbon migration,it depends on its adjacent layers whether the lithology sealing fault is sealing or non-sealing.According to the seal capacity of faults,each seal type can be divided into three sub-types:complete sealing,uncomplete sealing and opening.Large faults mostly present as fault-plane seal;small faults and branch faults on the top termination of large faults are of lithology seal.The characteristics of hydrocarbon distribution along both of them are different.The seal capacity of the faults whose upthrown side is basement rocks is lower than those in sedimentary cover,and activity of fault is favourable for hydrocarbon migration.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1995年第3期250-255,共6页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金
关键词
裂谷盆地
油气运移
断层
封闭
类型
rift basin,hydrocarbon migration,seal type of fault,fault trap.
