Characteristics of Sediment Supply and Sediment Dispersal in Binhai District of Qikou Sag,Central Huanghua Depression

摘要

The Qikou sag is the largest hydrocarbon-rich sag in the central Huanghua depression of Bohaiwan basin.It formed as a result of Tertiary rifting and was mainly filled with Cenozoic siliciclastic sediments about 8000-10000 m thick.The petroleum exploration of Binhai district in Qikou sag hardly gained breakthrough all through because of previous ambiguous understanding of spatial and temporal patterns