Study and Application of Carbonate Reservoir Characterization in Block-B on the Eastern Margin of the Pre-Caspian Basin

Carbonate sedimentary facies division and reservoir prediction are the problems that have obsessed the<br>petroleum industry for many years. Combined with the regional sedimentation evolution background of Block-<br>B on the eastern margin of the Pre-Caspian Basin and reservoir features dominated by primary porosity<br>indicated by drilled well, this paper performs the stratigraphic sequence division under the carbonate<br>platform sedimentation background firstly, and secondly, performs division and optimization of seismic<br>facies and sedimentary microfacies within different system tracts, and indicates that tidal flat and dolomite<br>flat microfacies of restricted platform subfacies within the high system tract of sequence KT-I are the most<br>favorable reservoir development facies in Block-B.