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:
Aug. 15, 2023
Filed:
Jun. 07, 2019
Applicant:
Texas Tech University System, Lubbock, TX (US);
Inventors:
Qiang Chen, Sichuan, CN;
James J. Sheng, Lubbock, TX (US);
Assignee:
Texas Tech University System, Lubbock, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/27 (2006.01); E21B 43/28 (2006.01); E21B 43/26 (2006.01); C09K 8/62 (2006.01); C09K 8/66 (2006.01);
U.S. Cl.
CPC ...
E21B 43/27 (2020.05); C09K 8/665 (2013.01);
Abstract
A method for generating microfractures in low carbonate mineral content shale reservoirs in which sulfate acid or persulfate compound (such as ammonium persulfate ((NH)SO)) injected into conventional fracturing fluid can react with shale carbonate components resulting in the precipitation reaction of gypsum crystal (CaSO·2HO) to occur.