Patents by Inventor Gary K. Li

Gary K. Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for performing reservoir simulation using preconditioning
    Patent number: 8903694
    Abstract: A computer-implemented system, method, and software are provided for solving linear systems of equations arising in reservoir simulation. A linear system of fluid flow equations, including a plurality of unknown variables, is provided that represents fluid flow properties in a geological formation of a subterranean reservoir. Block diagonal scaling is applied to the linear system of fluid flow equations. Threshold incomplete lower-upper approximate factorization is applied to obtain a preconditioning matrix, which can be used to iteratively solve unknown variables associated with the system of fluid flow equations. Preconditioning can be used directly as part of a preconditioned Krylov subspace method or alternatively as a 2nd stage preconditioner in a CPR algorithm.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: December 2, 2014
    Assignees: Chevron U.S.A. Inc., Schlumberger Technology Corporation
    Inventors: John R. Wallis, Gary K. Li, Gareth Shaw
  • System and Method For Performing Reservoir Simulation Using Preconditioning
    Publication number: 20120221303
    Abstract: A computer-implemented system, method, and software are provided for solving linear systems of equations arising in reservoir simulation. A linear system of fluid flow equations, including a plurality of unknown variables, is provided that represents fluid flow properties in a geological formation of a subterranean reservoir. Block diagonal scaling is applied to the linear system of fluid flow equations. Threshold incomplete lower-upper approximate factorization is applied to obtain a preconditioning matrix, which can be used to iteratively solve unknown variables associated with the system of fluid flow equations. Preconditioning can be used directly as part of a preconditioned Krylov subspace method or alternatively as a 2nd stage preconditioner in a CPR algorithm.
    Type: Application
    Filed: February 24, 2012
    Publication date: August 30, 2012
    Applicants: Schlumberger Technology Corporation, Chevron U.S.A. Inc.
    Inventors: John R. Wallis, Gary K. Li, Gareth Shaw