Abstract:

The method of regional seismic stratigraphy should be improved in some aspects due to the differences between fault-depressed continental basins and marine basins. The meaning of reflectional terminals varied from kind tokind. Seismic sequences should be discriminated into supersequences, sequences and subsequences according to the scale of unconformity. In the analysisof seismic facies, a reasonable program should be followed, and the internal combination of seismic facies, the gully-fan connection and the velocity-petrology parameters should be considered in addition to geometrical andphysical parameters. The inter pretation of seismic facies into correspondent depositional facies must be combined with well data as much as posible, and the seismic facies must be concordant with core facies ahd well-log facies.The study of the Langfang-Gu'an depression has provided an example of above approach.