Severely eroded Cambrian buried hill in the Yaha fault structural belt of Tarim Basin consists of the Upper

the Middle

and the Lower Cambrian dolomites.The Cambrian buried hill reservoirs are mainly distributed in the weathering crust and have a thickness of less than 100 m.They as a whole belong to fractured-vuggy reservoirs

with the characteristics of relatively small pores

fractures and vuggies

undistinguished seismic responses and strong lateral heterogeneity.The results of model-based reservoir inversion can not reveal the real lateral distribution of buried hill reservoirs

but that of seismic attribute-based reservoir prediction with amplitude-preserved 3D seismic pure wave data are more reliable.According to the analysis of seismic attribute coherence

RMS amplitude

reflection strength slope and arc length attributes were selected to perform a multi-seismic cluster analysis.The results show that the dolomite reservoirs in the Cambrian buried hills mainly occur in the structural high and nor-thern slope area and are in patchy distribution.These predictions are consistent with the drilling results.