Imparting in situ stability to displacing fluids
Abstract
Abstract A SECONDARY-TYPE RECOVERY PROCESS WHEREIN CRUDE OIL IS RECOVERED FROM A SUBTERRANEAN BY DISPLACING THERETHROUGH A DISPLACING FLUID COMPRISED OF ELECTROLYTE AND/OR SEMI-POLAR COMPOUND IS IMPROVED BY INJECTING INTO THE FORMATION BEFORE THE DISPLACING FLUID AN AQUEOUS PRE-SLUG CONTAINING A PREFEREBLY WATER SOLUBLE SEMI-POLAR COMPOUND OR ELECTROLYTE AND THE PREFERABLY WATER SOLUBLE SEMI-POLAR COMPOUND. EXAMPLES OF DISPLACING FLUIDS INCLUDE WATER-AND OIL-EXTERNAL EMULSIONS, AND WATER-AND OIL-EXTERNAL MICELLAR DISPERSIONS AND MISCIBLE-TYPE FLUIDS. A MOBILITY BUFFER SLUG CAN FOLLOW THE DISPLACING FLUID AND THE DISPLACING FLUID AND MOBILITY BUFFER CAN BE DISPLACED THROUGH THE FORMATION BY A DRIVE FLUID WHICH CAN BE SUBSTANTIALLY HYDROCARBON OR AQUEOUS.
Inventors
- 👤 Stanley C Jones
Bibliographic Details
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