VERFAHREN ZUR KOHLENWASSERSTOFFRÜCKGEWINNUNG IN EINEM GEOLOGISCHEN SPEICHER DURCH EINSPRITZUNG VON LEICHT SALZIGEM WASSER

摘要

The invention relates to a process for the recovery of hydrocarbons present in a geological reservoir, by means of the injection of a weakly saline aqueous solution. By means of laboratory measurements on a rock sample from the reservoir for at least two values. of salinity, a model representative of the evolution of the flow parameters is calibrated as a function of the salinity of the aqueous solution. Then by means of a flow simulator incorporating the calibrated model, the injection of aqueous solutions into the sample for at least the two salinity values is simulated, with and without capillary effects, and a residual oil saturation is determined. microscopic for each of the salinity values. Then, using the flow simulator incorporating the calibrated model and the determined microscopic residual oil saturation values, a diagram of exploitation of the reservoir is determined and said hydrocarbons of said reservoir are exploited according to the exploitation diagram.