Types and significance of the deep-water reservoirs in the Qiongdongnan Basin, South China Sea

Two types of deep-water hydrocarbon reservoirs are recognized on the basis of boreholes and seismic facies analysis in the Qiongdongna Basin, South China Sea. Type 1 reservoirs are formed in the shallow-water environments including the fan delta sandstones, littoral-shallow marine beach/bar sandstones and platform carbonate rocks, and type 2 reservoirs are originated from the deep-water environments including basin-floor fan and canyon channel sandstones. The submarine fan and canyon channel sandstones and platform carbonate rocks widespread in the deep-water areas are believed to be highly prospective for the deep-water hydrocarbon exploration.