Patents by Inventor Paul A. Fjerstad

Paul A. Fjerstad 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).

  • Method system and program storage device for optimization of valve settings in instrumented wells using adjoint gradient technology and reservoir simulation
    Patent number: 7640149
    Abstract: A new adjoint method for calculating and using adjoint gradients in a Reservoir Simulator comprises: calculating adjoint gradients of an objective function with respect to changes in valve settings taking into account the modeling of pressure drop and fluid flow along a wellbore, and using the adjoint gradients to calculate sensitivities of a reservoir to changes in parameterization of downhole devices and using of these sensitivities in optimal control of the wells to optimize some objective function subject to production constraints.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: December 29, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: David Rowan, Kieran Neylon, Ian Pallister, Paul A. Fjerstad
  • Method system and program storage device for optimization of valve settings in instrumented wells using adjoint gradient technology and reservoir simulation
    Publication number: 20060184329
    Abstract: A new adjoint method for calculating and using adjoint gradients in a Reservoir Simulator comprises: calculating adjoint gradients of an objective function with respect to changes in valve settings taking into account the modeling of pressure drop and fluid flow along a wellbore, and using the adjoint gradients to calculate sensitivities of a reservoir to changes in parameterization of downhole devices and using of these sensitivities in optimal control of the wells to optimize some objective function subject to production constraints.
    Type: Application
    Filed: December 5, 2005
    Publication date: August 17, 2006
    Inventors: David Rowan, Kieran Neylon, Ian Pallister, Paul Fjerstad