Depositional characteristics and reservoir potential of Paleogene sediment gravity flow deposits on a faulted slope of the Zhanhua Sag, Bohai Bay Basin, China

•Sediment gravity flows can be classified into intrabasinal and extrabasinal flows.•Deposition of sediment gravity flows are mainly controlled by faults and climate.•Hyperpycnites contribute significantly to the reservoirs of Bonan Oilfield.