REMOVING FINES FROM A SPENT AQUEOUS WELL TREATING FLUID

摘要

METHOD OF REMOVING FINES FROM A SPENT AQUEOUS WELL TREATING FLUID CONTAINING, FINES, A WATER-SOLUBLE POLYMER, A SALTING-OUT ANION AND/OR A SLIGHTYL SOLUBLE CALCIUM OR MAGNESIUM COMPOUND COMPRISING THE STEPS OF (A) RAISING THE PH OF THE AQUEOUS WELL TREATING FLUID TO ALLOW AGGLOMERATION OF THE FINES AND PRECIPITATION OF THE WATER-SOLUBLE POLYMER; AND (B) SEPARATING THE AGGLOMERATES FROM THE AQUEOUS WELL TREATING FLUID.