1. School of Sciences��China University of Petroleum��Beijing 102249��China; 2. Research Institute of Petroleum Exploration and Production��SINOPEC��Beijing 100083��China

Tarim Basin is one of the most important strategic succeeding regions of hydrocarbon resources in China��where petroleum exploration in marine carbonate rocks is very difficult. The veracity and accuracy of stratigraphic division and comparison have directly influenced each step of petroleum exploration. The authors discuss on the application of sequence stratigraphic theory��the style and identification sign of sequence boundary and the typical sequence division scheme of Cambrian--Ordovician carbonate rocks��particalarly on the forecast of source rock and karst reservoir in sequence stratigraphic framework and the migratory effect of sequence boundary to fluid. A series of key questions about carbonate rock sequence stratigraphic research and the primary imagination of development trend in the Tarim Basin are proposed in this paper.