《Table 1.Brief description of marine stratigraphic development characteristics of three major oil-an

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《"Distribution and exploration direction of medium-and large-sized marine carbonate gas fields in Sichuan Basin, SW China"》

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Sichuan Basin is a large superimposed basin developed based on the Upper Yangtze Craton.It experienced the Late Proterozoic–Middle Triassic marine and Late Triassic–Cenozoic continental basin development stages.Among them，the marine stratigraphic depositional stage had been lasting for4.2×108 a，and the marine strata with a thickness of 4 000–7 000 m，of which，the carbonate stratum is about 3 000–5 000 m thick（Fig.1）.Among 3 major oil-and gas-bearing basins in Western China，Sichuan Basin is obviously characterized by longer development time，more strata and greater thickness of marine carbonate rocks（Table 1）.