Abstract: In recent years, the exploration of the hydrothermal dolomite reservoir of the Maokou formation in the Fuling area of southeastern Sichuan province has obtained a huge exploration potential, but the reservoir is thin and heterogeneous, and it is difficult to identify and predict seismic data. Based on the understanding of the main controlling factors for the hydrothermal dolomite reservoir development, the macro-description centered on fine characterization of basement faults and identification of favorable microfacies of bioclastic beach facies is first carried out. Secondly, quantitative prediction techniques such as reservoir logging sensitivity parameter optimization and dimension reduction and fusion are applied to realize the detailed description of hydrothermal dolomite reservoirs based on "fault control" and "facies control". The results show that the hydrothermal dolomite reservoir is mainly developed in the favorable sedimentary microfacies of the bioclastic shoal near the basement fault due to its special genesis and controlling factors, and tends to thin away from the basement fault.