摘要
受构造和沉积作用控制,黄骅坳陷歧口凹陷埕北断阶带发育了断层、砂体和不整合等多种类型输导层,构成复杂的立体网络通道。以断层为主要运移通道的油气藏常在断裂带附近多层叠置;以连通砂体为主要运移通道的油气藏常形成于距烃源层较近或相邻的层位;不整合作为运移通道往往可使油气长距离运移形成各种地层油气藏。埕北断阶带的油气藏多为油气经过两种或多种输导层阶梯式运移而形成的,多个不整合、油源断层以及各层系砂体的空间配置控制了油气藏的类型和分布,砂体、断层和不整合组成的输导体系的末端和边缘往往是油气运移的重要指向区。
Controlled by tectonization and sedimentation,the Chengbei fault step belt of Qikou sag,Huanghua Depression,develops various kinds of carrying beds,including faults,sand bodies and unconformities,which formed the complex solid network pathways.The oil reservoirs whose hydrocarbon migrated vertically along the faults often have multiple oil beds overlapped around the faults.However,the oil reservoirs whose hydrocarbon migrated mainly along the connected sand bodies mainly formed in strata near by the source rocks.Hydrocarbon through the unconformity can migrate in a long distance and formed stratigraphic reservoirs.All reservoirs in the Chengbei fault step belt were formed by migration in two or more carrying beds.The multi-match relation between fault systems,sand bodies and unconformities in time and space controlled the types and distribution of reservoirs.The margin and the end of carrying bed systems are usually the significant target areas of oil and gas migration.
出处
《石油地质与工程》
CAS
2012年第2期1-5,共5页
Petroleum Geology and Engineering
基金
国家科技重大专项"中国陆上地层油气藏形成主控因素与成藏模拟研究"(2008ZX05001)资助
关键词
埕北断阶带
输导体系
断裂
砂体
歧口凹陷
Chengbei fault step belt
carrying bed systems
fault
sand body
unconformity
