The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 1978
Filed:
Feb. 04, 1976
Mohan V Kudchadker, Houston, TX (US);
Walter J Weiss, Sugarland, TX (US);
Texaco Inc., New York, NY (US);
Abstract
A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting via the injection well into the formation an aqueous solution of sulfomethylated lignite salt as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may be carried out by first injecting the sulfomethylated lignite salt into the formation through the injection well and following them with either a polymer or a surfactant solution which may also contain sulfomethylated lignite salt. The polymer and/or surfactant would then be followed by a drive fluid such as water to push the chemicals to the production well.