This article presents core-flooding experiments on a Bazhenov Formation core sample designed to evaluate whether post-water methanol treatment can restore permeability. At reservoir conditions (110 °C, 23.5 MPa), the core was first water-flooded and then subjected to oil injection into the water-saturated rock, which caused severe, progressive permeability loss. NMR T1-T2 mapping captured fluid redistribution and the growth of bound/high-viscosity components. Gas chromatography indicated C36+-rich precipitates. A subsequent methanol flush stabilized the pressure drop and restored $\sim$87% of the pre-damage water permeability. These findings elucidate a water-oil-rock interaction pathway fo... More >