The calculation of water saturation in carbonate reservoirs has perennially posed a significant challenge within the logging community. The complex development of fractures and holes in the Dengying Formation on the northern slope of the central Sichuan paleo-uplift further complicates the accurate assessment of water saturation in the Dengying Formation reservoir in this region. To address this issue, this study conducts a comprehensive analysis of prior research pertaining to water saturation calculation methods, ultimately adopting the approach based on the triple porosity model. The findings reveal that: (1) The water saturation error computed through the conventional Archie formula markedly exceeds that obtained via the triple porosity model. (2) The water saturation determined by the triple porosity model derived from the Maxwell-Garnett mixing conduction law demonstrates superior accuracy compared to the triple porosity model derived from the simplistic "series-parallel" derivation. (3) The triple porosity model, accounting for the influence of fracture inclination on rock conductivity, proves more accurate than its counterpart neglecting such considerations. (4) Utilizing the triple porosity model proposed by Tian et al., satisfactory results are achieved in the calculation of water saturation for fractured-vuggy reservoirs within the Dengying Formation on the central and northern slopes of Sichuan. This investigation holds significant reference value for the accurate determination of water saturation in carbonate fractured-vuggy reservoirs.