METHOD OF USING UREA AS A SACRIFICIAL AGENT FOR SURFACTANTS IN ENHANCED OIL RECOVERY

摘要

METHOD OF USING UREA AS A SACRIFICIAL AGENT FOR SURFACTANTS IN ENHANCED OIL RECOVERY (D#79,012-F) The disclosed invention is a method of injecting a solution or emulsion containing about 0.05% to about 10% by weight of urea as a sacrificial agent for surfactants into an underground formation in enhanced oil recovery operations, said underground formation having a temperature greater than about 130.degree.F. HJD pg/aw:EX8N/OlACAN