Composition and method for remediation of near wellbore damage
AssigneeChevron U.S.A. Inc.
InventorsVaradarajan Dwarakanath, Robert Matthew Dean, Will S. Slaughter, Dustin Luke Walker, Sophany Thach
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Abstract
Aspects of the invention relate to compositions and methods that are used for remediation of near-wellbore damage. A specific aspect is a composition comprising an olefin sulfonate, a sulfosuccinate, and a chemical selected from the group consisting of an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof.
Claims7
A method for remediation of existing damage in a region near an injection wellbore in communication with a subterranean reservoir wherein the injection wellbore is not intended for receiving hydrocarbons and wherein the existing damage is caused by previous injection of a composition containing a polymer emulsion into the injection wellbore, the method comprising injecting into the subterranean reservoir a composition comprising an emulsion polymer, a C20 internal olefin sulfonate, a C15-18 internal olefin sulfonate, and an alcohol alkoxylated carboxylate, thereby dissolving, cleaning and/or flushing the polymer emulsion away from the injection wellbore.
Dependencies are inferred from the claim text.