brine geoelectric field 4 hydrocarbon reservoir 4 numerical model 4 Borehole 2 Boreholes 2 Downholes 2 Electrical measurement 2 Electrical modeling 2 Electrodes 2 Flowing wells 2 Geoelectrical 2 Geoelectrical methods 2 High electrical conductivity 2 Hydrocarbon reservoir 2 Oil shale 2 Oil wells 2 Petroleum reservoir engineering 2 Petroleum reservoirs 2 Reservoir 2 Reservoir pressures 2 Reservoirs (water) 2 Secondary recovery 2 Surface measurement 2 Surface-downhole 2 Water injection 2 borehole geophysics 2 brine plumes 2 computer simulation 2 detection method 2