Geological characteristics of the Triassic tight sandstone oil and gas reservoirs in Luoyang-Yichuan area

Research of the petroleum geological conditions indicates that Luoyang-Yichuan area is located in the same large depressed lacustrine basin with Ordos Basin in the Triassic. They have similar source-reservoir-caprock associations, thick and extensive source rocks, tight reservoir and active hydrocarbon shows in the Triassic. Therefore, the Luo-yang-Yichuan area has the geological conditions for accumulation of tight sand oil/gas. In combination with the analysis of industrial gas flow from the Upper Triassic Chunshuyao Formation in Well Tun 1, we believe that the Triassic reservoirs of the Luoyang-Yichuan area are pre-existing tight sandstone oil/gas reservoirs with low permeability, abnormal pressure, inverted oil-gas contact with oil in the upper and gas in the lower. The Triassic tight sandstone reservoirs are the main targets of petroleum exploration in Luoyang-Yichuan area in the future.