The program of seismic sedimentology and its application to Shahejie Formation in Qikou depression of North China

Abstract：Seismic sedimentology has aroused much attention among geologies both in China and abroad in that it plays an important role in the exploration and production of thin reservoirs. According to the theory of seismic sedimentology and practices in continental basins, this paper puts forward a program of seismic sedimentology suitable for China’s continental basins with lots of thin sand bodies: first, the high resolution sequence framework is built up and seismic data are converted to 90°phase, then seismic processing within different frequencies and stratal slicing with different seismic attributes were conducted, lithologies in cores are correlated with stratal slicing, thin sand bodies are determined in plane with seismic geomorphology so as to define depositional systems and their evolutions, and lastly, the favorable lithological traps are predicted. With the Shahejie Formation of Qikou depression as the studied object of seismic sedimentology, the authors determined the distribution of delta of Shahejie Formation in Qikou depression and forecasted the regions of beneficial lithologic traps.