关键词: 澳大利亚陆上盆地, 页岩气, 海相泥页岩, 总有机碳, 地化指标

Abstract:

Australian onshore basins, being mainly of intracratonic basins deposited marine shales during Paleozoic and late Proterozoic. In order to identify the gas potential of these marine shales, the geological characteristics, geochemical indicators, distribution of favorable strata of eight Australian onshore basins were analyzed. The results show that the Paleozoic and late Proterozoic marine shales are good quality source rocks. In general, the average of total organic carbon values exceeds 2%; the kerogen is mainly of TypeⅠor Ⅱ; and maturity is high due to moderate buried depth. Some areas have shale gas exploration potential, especially in the west of McArthur Basin, the north and south of Georgina Basin, and the south of Canning Basin. 

Key words: Australian onshore basin, shale gas, marine shale, total organic carbon, geochemical indicator