PRELIMINARY DISCUSSION ON RESIDUAL BASINS
Liu Guangding (Institute of Geophysics, Chinese Academy of Sciences/Beijing, China, 100101)
According to tectonics of China and its formation and evolution history, there are two types of sedimentary basins with good prospect for hydrocarbon resources, Mesozoic-Cenozoic basins with terrestrial clastic deposits and Paleozoic basins with marine carbonate deposits. Hydrocarbon potentials of the former have been proved by the exploration practice. Paleozoic marine carbonate rocks were extensively developed and oil and gas reservoirs formed were heavily destroyed in Mesozoic Era, some have been outcropped. The extensive study of paleo reservoirs shows that there still exists some Paleozoic marine carbonate residual basins in which reservoirs have not been destroyed. Because of their complicated geological conditions, multi-disciplinary research, combining with geological and geophysical study is an important key to oil and gas exploration in residual basins.