Abstract: It is unreliable that using strong phase contrast method to identify the sequence stratigraphic interface and the subtle trap during seismic interpretation. This paper proposes the seismic reflection phase contrast and interpretation method, amplitude synchronism contrast principle and rationality examination. It suggests that these methods are effective for description of stratigraphic-lithologic traps and should be used to identify them with more accuracy.

Key words: phase contrast, seismic multi-attributes, sequence stratigraphic interface, stratigraphic (lithologic) trap, method