Identification of Non-structural Traps in Haizhong Depression of Weixi Exploration Area

By using PSDM seismic data from Weixi exploration area, guided by sequence stratigraphy and sedimentology theory, non-structural traps have been identified through comprehensive geophysical interpretation by seismic attribute study, seismic spectral decomposition, seismic impedance inversion and sand body description on the basis of fine interpretation results of seismic and logging data. The identified non-structural traps are mainly lithologic traps in Member-2 of Liushagang Formation and Member-4 of Weizhou Formation. In addition, analysis about the reservoir and hydrocarbon bearing conditions in the identified non-structural traps has been carried out. The analyzing results can provide basis for evaluation on the drilling targets in Weixi exploration area.