Wen Xiong Chen

Address:

1414 Modeste Dr, League City, TX 77573

Phone:

(281)3372902

VIN:

4JGBF8GE0BA752944

Make:

MERCEDES-BENZ

Model:

GL-CLASS

Year:

2011

Address:

1414 Modeste Dr, League City, TX 77573

VIN:

1GTGG29U471141427

Make:

GMC

Model:

SAVANA CARGO

Year:

2007

US Patent:

20120150506, Jun 14, 2012

Filed:

Dec 12, 2011

Appl. No.:

13/323060

Inventors:

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

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G06F 17/11
G06G 7/57
G06F 17/16

US Classification:

703 2

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.