An experimental investigation of waterflooding of gas condensate reservoirs and their subsequent blowdown

The phase and flow behaviour of water, gas and condensate in pores at reservoir conditions have been visually investigated using glass micromodels with realistic pore pattems and geometry. The displacement of hydrocarbons, both above and below the dew point, by the advancing water was studied. The model at residual hydrocarbon saturation was depleted and the remobilisation behaviour of the trapped gascondensate phases was investigated. Preliminary core flooding results obtained at conditions similar to the micromodel tests confirm the observed phenomena.