Imparting in situ stability to displacing fluids
Abstract
Abstract A SECONDARY-TYPE RECOVERY PROCESS WHEREIN CRUDE OIL IS RECOVERED FROM A SUBTERRANEAN FORMATION BY DISPLACING THERETHROUGH A DISPLACING FLUID COMPRISED OF ELECTROLYTE AND SEMI-POLAR ORGANIC COMPOUND OR SEMI-POLAR ORGANIC COMPOUND IS IMPROVED BY INJECTING INTO THE FORMATION BEFORE THE DISPLACING FLUID A PRE-SLUG CONTAINING ELECTROLYTE AND SEMI-POLAR COMPOUND. EXAMPLES OF DISPLACING FLUIDS INCLUDE WATER- AND OIL-EXTERNAL EMULSIONS, AND WATER- AND OIL-EXTERNAL MICELLAR DISPERSIONS AND MISCIBLETYPE FLUIDS, EXAMPLES OF PRESLUGS INCLUDE PREFERABLY AQUEOUS FLUIDS BUT ALOS INCLUDE THOSE WHICH ARE SUBSTANTIALLY HYDROCARBON. A MOBILITY BUFFER SLUG CAN FOLLOW THE DISPLACING FLUID. THE DISPLACING FLUID AND THE 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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