摘要
松辽盆地属于大型陆相中生界含油气盆地,通过高分辨率三维地震资料分析,发现在松辽盆地北部嫩江组一段发育大规模重力流水道系统,嫩江组二三段发育多套滑塌体。研究认为嫩江组一段发育的大型重力流水道系统是由于河流直接入湖而形成;嫩江组二三段发育的3套滑塌体是由于三角洲前缘古地形坡度大、沉积物发生重力滑动所导致。研究松辽盆地大型陆相坳陷湖盆发育的沉积物重力流分布特征及其形成机制对在湖相泥岩中寻找岩性油气藏具有一定的指导意义。
Songliao Basin is a large-scale Mesozoic continental petroliferous basin. Based on analysis of high- resolution 3D seismic data,a large-scale sediment gravity flow channel system is identified in the Member 1 of Nenjiang Formation,and multiple sets of slip blocks are identified in the Member 2-3 of Nenjiang Forma- tion in the north Songliao Basin. It indicates that this channel system resulted from the rushing of river into lake,and the 3 slip blocks resulted from gravity slumping of delta front sediment due to its great slope gra- dient, which will be transported by the earthquake or flood. It has extremely important meaning to hydro- carbon reservoirs within lacustrine mudstones of large-scale depressionqacustrine basin that we have made clear about the generation mechanism of sediment gravity flow in the Nenjiang Formation in the Songliao Basin.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2013年第3期555-565,共11页
Natural Gas Geoscience
基金
"国家重点基础研究发展规划"项目(编号:2006CB202302)资助
关键词
湖底水道
滑塌体
沉积物重力流
嫩江组
松辽盆地北部
Lacustrine subaqueous channel
Slip block
Sediment gravity flow
Nenjiang Formation
North-ern Songliao Basin
