Patents by Inventor Stephan Gelinsky

Stephan Gelinsky 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 for estimating permeability of earth formations by processing stoneley waves from an acoustic wellbore logging instrument
    Patent number: 5784333
    Abstract: A method for determining the permeability of earth formations penetrated by a wellbore from acoustic signals measured by an acoustic wellbore logging instrument. The method includes separating components from the measured acoustic signals which represent Stoneley waves propagating through the earth formations. Signals representing Stoneley waves propagating through the same earth formations are synthesized. The separated acoustic signal components and the synthesized Stoneley wave signals are compared. The permeability is determined from differences between the synthesized Stoneley wave signals and the separated acoustic signal components. In a preferred embodiment, the step of calculating the permeability includes inversion processing a wave center frequency shift and a wave travel time delay with respect to the permeability of the earth formations.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: July 21, 1998
    Assignee: Western Atlas International, Inc.
    Inventors: Xiaoming Tang, Stephan Gelinsky, Raghu K. Chunduru, Arthur C. H. Cheng