Abstract:

Structural fault terrace zone incloses steep and gentle slopes.The control of the both kinds of slopes on sandbodies are different due to topography.During lowstand,alluvial fan,fan delta developed on steep slope while fluvial plain,small alluvial fan and fan delta developed on gentle slope.During progression period,fan head,midfan and far end of alluvial fan or fan delta devloped on different fault terraces,turbidite fan and gravity flow deposites developed on deep depressed position,while retrogradation of predepositional sandbodies developed on the gentle slope.During high stand,wedge and lense shaped deposits of delta progradation developed on the whole ares.Besides,fault activities and their migration directions also influenced the distribution of sandbodies.These regularities could be used to predict sandbodied on seismic profile.

Key words: Key Words:structural fault terrace, sandbody, prediction, Zhanhua Sag