Abstract:

The exploration of shale gas indicated an indisputable fact that there is gas in shale, but the size of the shale gas reservoir and its industrial value need further study. Compared to the high production of U.S. shale gas, shale gas has its peculiar geological characteristics in China. The shale gas preservation conditions may be the focus of the shale gas exploration in China, which is less studied in U.S. shale gas exploration. This paper studied the shale gas preservation conditions by material basis, tectonism, evolutionary history, hydrogeology, seal and its microscopic properties, gas composition, pressure coefficient and other parameters of shale in the Lower Cambrian and the Upper OrdovicianLower Silurian of the Lower Paleozoic in Sichuan Basin and its periphery. The evaluation system of shale gas preservation of south China was put forward by comprehensive analysis of various parameters.

Key words: Sichuan Basin and its periphery, shale gas, preservation conditions, tectonism, hydrogeology