TREATMENT OF STEAM FEEDWATER WITH CO.SUB.2 TO REDUCE OIL WELL RESERVOIR GRAVEL AND SAND DISSOLUTION DURING STEAM INJECTION

摘要

ABSTRACT OF THE DISCLOSUREA method of inhibiting the dissolution of thegravel pack and/or the erosion of silicate-containingformations subjected to steam-enhanced oil recovery pro-cesses. The method includes the addition of CO2 into theresidual liquid phase of the steam, prior to injectiondown the well bore, to reduce the pH to from about pH 5 toabout pH 9.