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. 08, 2014
Filed:
Dec. 12, 2011
Choongyong Han, Houston, TX (US);
John Wallis, Sugar Land, TX (US);
Pallav Sarma, San Ramon, CA (US);
Gary LI, Katy, TX (US);
Mark Schrader, The Woodlands, TX (US);
Wen Chen, Danville, CA (US);
Choongyong Han, Houston, TX (US);
John Wallis, Sugar Land, TX (US);
Pallav Sarma, San Ramon, CA (US);
Gary Li, Katy, TX (US);
Mark Schrader, The Woodlands, TX (US);
Wen Chen, Danville, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A method, system and computer program product is disclosed for using a constrained pressure residual (CPR) preconditioner to solve adjoint models. A linear system of fluid flow equations comprising a plurality of variables that represent fluid flow properties in a geological formation of a subterranean reservoir is provided. Matrix (Ã), which comprises a transpose of a Jacobian matrix associated with the linear system of fluid flow equations, is constructed. A constrained pressure residual preconditioner Mis constructed responsive to the matrix (Ã). Matrix equation (Ã)y=d is then solved using the constrained pressure residual preconditioner M.