Abstract: The bottom water sandstone reservoirs in the Tahe Oil Field are mainly developed by drilling horizontal wells. They have sufficient natural energy of bottom water and serious reservoir heterogeneity. Bottom water cones along high permeability zones, which makes it difficult for remaining oil recovery. Applying numerical simulation and production logging data, a conclusion was drawn that bottom water breakthrough from high permeability zones easily. Furthermore, based on earlier research, we combined particle bridging plugging with dispersed phase for the first time. Oil-based particle agents for water plugging were proposed. This technique was fairly effective in field application and worth promoting.