Research and Application of Logging Evaluation Method for Lower Limit of “Dynamic” Physical Property of Tight Gas Reservoir

Different from conventional gas reservoirs, it is difficult to determine the lower limit of effective reservoir for tight sandstone gas reservoirs, because of the influence of Hydrocarbon expulsion power of source rocks on the location and enrichment of natural gas, the strong heterogeneity of tight sandstone, poor connectivity of sandstone and inconsistency of gas-water interface, etc.