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:
Jun. 13, 2006
Filed:
Jul. 22, 2003
Philip James Rae, Landridge Condo, SG;
Gino Di Lullo Arias, Rio de Janerio, BR;
Atikah Bte Ahmad, Buena Vista Gardeo, SG;
Leonard J. Kalfayan, Houston, TX (US);
Philip James Rae, Landridge Condo, SG;
Gino Di Lullo Arias, Rio de Janerio, BR;
Atikah Bte Ahmad, Buena Vista Gardeo, SG;
Leonard J. Kalfayan, Houston, TX (US);
BJ Services Company, Houston, TX (US);
Abstract
A method of stimulating subterranean formations in oil and gas wells using a high pH buffered acid system. The method may be used to treat sandstone formations wherein the pH buffered acid system is used as the preflush or overflush or both. The method consists of introducing into the well a hydrofluoric acid containing sandstone acidizing solution either prior to or subsequent to introduction of the pH buffered acid system. The pH buffered acid system may further be used in the treatment of carbonate reservoirs. The pH of the buffered acid solution is substantially equivalent to that of the pH of the acidizing solution. The buffered acid solution is void of either hydrofluoric acid or hydrofluoric acid precursors.