Quantitative Sedimentary Simulation of Braided Delta Of Oligocene Huagang Formation in Xihu Depression, East China Sea
X.F. Lyu, Ch.M. Dong, Ch.Y Lin, Ch. Jing and Q. Zhang
Event name: 16th International Conference on Geoinformatics - Theoretical and Applied Aspects
Session: Student Programme
Publication date: 15 May 2017
Info: Extended abstract, PDF ( 919.93Kb )
Price: € 20
Oligocene Huagang Formation of Xihu Depression in the East China Sea found to be a thick lacustrine braided delta deposit and good low-permeability gas reservoir. Due to the study area located in deep water, with few wells drilled and limited and poor quality seismic data, its sedimentary distribution and reservoir distribution remain unclear. For this reason, we for the first time to conduct numerical sedimentary simulations to define the main controlling factors and to reconstruct its sedimentary processes with seismic data interpretation, well logging analysis and core description etc. The results indicate that the main controlling factors of this braided delta deposit in Oligocene Xihu Depression include its ancient landform before the sedimentary processes, sediment supply, source location, and lacustrine level changes. The result shows that in the early stage, braided delta front dominant on both slopes contributing as good reservoir. In the late stage, with sediment supply was abundant and the lacustrine depression shrinking with time, more braided delta plains were developing. This study provides anther evidence for good reservoir location as well as a novel insight into its future hydrocarbon exploration and development.