In the southeastern margin of the Yangzi (Yangtze) landmass of China, marine strata from Sinian to Middle-Triassic were developed in two meg-cycles of the rift evolvement of Huanan (South-China) plate. Based on sequence stratigraphy research, it is considered that 13 super-sequences and 94 sequences were deposited, in which the best regional source rocks are in TST of super-sequence 3 (Lower Cambrian) and super-sequence 12 and 13 (Permian). For sedimentary fades, the platform basin, restricted platform, outer shelf and deep basin are favorable for source rock developed. Minor production oil flow has been got in Triassic of Jurong basin in Jiangsu province, and Permian Leping basin in Jiangxi province; the coal-seam gas in Fengcheng, Jianxi is exploited for residenters, and destroyed oil reservoir is found in Triassic of Shiwandashan basin, Guangxi province. There is over 2.0x10~9t of oil equivalent according to resource evaluation in this region. Based on recent optimum quantitative evaluation, it's considered that the major strata for exploration is Permian and Carboniferous, and the rift basin belt, i.e., the marine strata area in Jurong and Changzhou basins in Jiangsu province -Leping and Pingxiang basins in Jiangxi-Shiwandashan basin in Guangxi province, is one of the prospective realms in South China. Furtherly, comprehensive work should be done for marine oil and associated gas and fractured gas, coal-genetic gas and coal-seam gas in the trasitional fades, so as to a new success.
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