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:
Jul. 21, 2026
Filed:
Dec. 15, 2022
Applicant:
Chevron U.s.a. Inc., San Ramon, CA (US);
Inventors:
Michael James Fuller, Cypress, TX (US);
Shannon Kirstin Stocks, Alvin, TX (US);
Assignee:
CHEVRON U.S.A. INC., San Ramon, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/11 (2012.01); C09K 8/70 (2006.01); E21B 43/27 (2006.01);
U.S. Cl.
CPC ...
E21B 47/11 (2020.05); C09K 8/70 (2013.01); E21B 43/27 (2020.05);
Abstract
Methods for assessing the effectiveness of an acid stimulation operation in a hydrocarbon well. The methods use encapsulated tracer particles comprising a tracer material that is coated with a calcium carbonate shell. Different encapsulated tracer particles are placed into different portions of a well. A subsequent acid stimulation operation dissolves the calcium carbonate shell and releases the tracer material. The different tracer materials indicate the effectiveness of the acid stimulation operation in different portions of the well.