STUDY OF SUBTLE GLUTENITE RESERVOIRS IN SYN-DEPOSITIONAL FAULT ZONES-A CASE STUDY OF THE SHENGBEI FAULT ZONE IN THE DONGYING DEPRESSION

Based on the principles of tectonic sequence analysis and base-level analysis,high-resolution seismic sections,log curves and lithofacies data,the depositional characteristics of the lowstand sand bodies of Shengbei fault zone in the Dongying Depression and their development and the significance in petroleum geology were studied in detail.It showed that the lowstand sand bodies of the Shengbei fault zone consisted of alluvial fan,fan delta,turbidite fan and mini-delta.The development of sand bodies was controlled by syn-depositional fault and the lower part of the sequences near the fault break zone was favourable for occurrence of subtle reservoirs.