This dataset compiles petrophysical data and facies information at core and well scale from carbonate reservoirs of the Barra Velha Formation (Santos Basin – Brazilian Pre-Salt). It includes routine core analysis (RCAL), pore type classification, and well logs (NMR). The data were integrated to define dominant pore types along depth intervals and assess their impact on reservoir quality, using CT imaging, thin sections, and core descriptions. This multi-scale approach supports the interpretation of flow units and the heterogeneity of pore systems in pre-salt lacustrine carbonates.