Water Flooding Efficiency in a Low-Permeability Mixed-Wet to Oil-Wet Carbonate Reservoir; A Case Study from the Kharaib B Reservoir in the Al Shaheen Field, Offshore Qatar

This paper describes the studies and measurements performed to assess the sweep efficiency and remaining oil saturation<br>after water flooding in the mixed-wet to oil-wet, low permeability Kharaib B carbonate reservoir, which is further<br>characterized by pronounced homogeneneity of the reservoir matrix and substantial lateral variation in fluid properties. The<br>Kharaib B reservoir is developed with extended reach horizontal wells and has been successfully water flooded since the field<br>development started in the mid-1990s.