摘要
以歧口凹陷三维地震剖面为主要基础资料,通过计算沙河街组三段、一段以及东营组沉积时期的古落差,剖析了南大港断裂的活动性。结果表明,南大港断裂在沙河街组一段沉积时期活动性最强,断裂未表现出明显的构造迁移现象,与整个区域断裂的活动规律"格格不入",其原因应与基底走滑断裂的活动有关。另外,还提出了南大港断裂现今的形态是在明化镇组后才形成的。最后,论述了南大港断裂对于油气生成、运移以及聚集成藏的影响,指出了其重要的油气意义。
According to three-dimensional seismic profiles of Qikou depression as the main basic information, and calculating paleo fall of the Shahejie formation section Ⅲ, section Ⅰ and Dongying formation sedimentary period. Nandagang fault activity has been analyzed. The results showed that the Nandagang fault activity is the strongest in Shahejie formation section Ⅰ sedimentary period, which did not show obvious tectonic migration, and the activity is different from the activity patterns of the study area, which resulted from the basement strike-slip faults. In addition, in the article, it is pointed out that the current Nandagang fault present formation was formed after Minghuazhen formation. Finally, it is discovered how the Nandagang fault affected the hydrocarbon generation, migration and accumulation and its significance.
出处
《石油地质与工程》
CAS
2012年第4期1-4,共4页
Petroleum Geology and Engineering
基金
国家自然科学基金(重大研究计划)重点项目(90814005)
近海富烃凹陷资源潜力再评价和新区
新领域勘探方向(2011ZX05023-001)("十二五"国家重大科技专项)
关键词
歧口凹陷
南大港断裂
古落差
构造迁移
构造演化
油气意义
Qikou depression
Nandagang fault
paleo fall
tectonic migration
tectonic evolution
hydrocarbon significance
