Review of Distribution and Controlling Factors for Continental Lithologic and Stratigraphic Oil-Gas Reservoirs in China

This paper systematically summarizes the theories about distribution and controlling factors of lithologic and stratigraphic oil-gas reservoirs from basin types,their distribution in sequence stratigraphic framework and controlling factors of sand,reservoirs and accumulation zone,which provides a basis for further theoretical study.Continental lithologic and stratigraphic oil-gas reservoirs are formed in the faulted basin,depression basin and foreland basin.However,their distribution in system tracts varies in different type basins.Controlling factors of lithologic and stratigraphic oil-gas reservoirs formation include controlling factors of sand,reservoirs and accumulation zone,while controlling factors of sand include slope,fault,paleo-water-depth,paleo-climate,paleo-sediment source and tectonic movement.In contrast,reservoirs are controlled by maximum flooding surface(MFS),regional unconformity surface and fault surface,and the accumulation zones are subject to favorable sedimentary facies,fault-developed belts,strata termination belts,secondary porosity developed belts,fluid property changed belts and tectonic slope-break belts.