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, 1989
Filed:
May. 24, 1988
Liming Hsueh, Buena Park, CA (US);
Marion G Reed, Hacienda Heights, CA (US);
Chevron Research Company, San Francisco, CA (US);
Abstract
The present invention provides a method for inhibiting permeablility damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetrating the formation while inhibiting pipe corrosion. It comprises: (1) injecting a wet steam comprising (a) an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of the wet steam effective to inhibit the permeability damage of the formation in the vicinity of the vapor phase, and (b) an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, effective to raise the pH of the liquid phase of the wet steam within the range of from about 7.5 to about 10.5; and (2) monitoring the pH of the residual liquid phase and continually adjusting the addition of the bicarbonate salt to maintain the pH within the range of from about 7.5 to about 10.5.