SEISMIC MULTI-PARAMETERS ANALYSIS AND EVALUATION OF LITHOLOGIC TRAPS

In view of the complexity in boundary condition,irregularity in shape and subtle in occurrence of lithologic traps,a practical approach of identification,preference,description and evaluation of lithologic traps is put forward in this paper,which is the multi-parameter analysis of seismic data based on sequence stratigraphy and "three facies" integrated interpretation.This method mainly includes seismic facies analysis,seismic inversion and reservoir prediction,seismic attributes analysis,fluid potential analysis and hydrocarbon detection,3-dimensional visualization etc.The applications in Banghu area of the Jianghan Basin and Shengbei area of Turpan-Harmy Basin preliminary show the effectiveness and practicability of this approach in identification,preference,description and evaluation of lithologic traps.The practical shows that this approach is suit for lithologic reservoir exploration of the area with good quality of seismic data,simplicity in structure and medium or matured exploration area.And the selection of seismic data,definition of the size of time-widows for analysis,interpretation of top and bottom constraint horizon,optimization of seismic attributes in different frequency band are the key points for this approach.