Patents by Inventor Guozhong Gao

Guozhong Gao 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).

  • PROVIDING A TOW CABLE HAVING PLURAL ELECTROMAGNETIC RECEIVERS AND ONE OR MORE ELECTROMAGNETIC SOURCES
    Publication number: 20100171501
    Abstract: To perform marine electromagnetic (EM) surveying of a subterranean structure, a marine cable system is provided including a tow cable, a plurality of electromagnetic (EM) sources coupled to the tow cable, and a plurality of EM receivers coupled to the tow cable. The system is configured for deployment in a body of water to perform marine EM surveying of a subterranean structure.
    Type: Application
    Filed: January 7, 2009
    Publication date: July 8, 2010
    Inventors: David L. Alumbaugh, Guozhong Gao, Tarek M. Habashy, Frank H. Morrison, Michael Oristaglio, Kambiz Safinya, Andrea Zerilli
  • Casing Correction in Non-magnetic Casing by the Measurement of the Impedance of a Transmitter or Receiver
    Publication number: 20100097066
    Abstract: Methods and related systems are described for determining the casing attenuation factor for various frequencies from measurements of the impedance of the transmitting or receiving coil of wire of. The compensation is based on two relationships. The first relationship is between one or more measured impedance parameters and the product of casing conductivity, casing thickness and electromagnetic frequency. The second relationship is between the casing correction factor and the product of casing conductivity, casing thickness and electromagnetic frequency.
    Type: Application
    Filed: March 16, 2009
    Publication date: April 22, 2010
    Inventor: Guozhong Gao
  • CHARACTERIZING AN EARTH SUBTERRANEAN STRUCTURE BY ITERATIVELY PERFORMING INVERSION BASED ON A FUNCTION
    Publication number: 20090157320
    Abstract: To characterize an earth subterranean structure using a measurement assembly including electromagnetic (EM) receivers and one or more EM sources, measured voltage data collected by EM receivers in response to transmission by one or more EM sources is received. Based on a model, predicted EM data is computed. Inversion is iteratively performed according to a function that computes a difference between the measured voltage data and a product of a term containing the predicted EM data and a term containing distortion data that accounts at least for distortion effect by an environment of the measurement assembly. The inversion is iteratively performed to solve for parameters of the model and the distortion data.
    Type: Application
    Filed: June 19, 2008
    Publication date: June 18, 2009
    Applicant: Schlumberger Technology Corporation
    Inventors: Aria Abubakar, Tarek Habashy, David Alumbaugh, Ping Zhang, Guozhong Gao, Jianguo Liu
  • Characterizing an Earth Subterranean Structure by Iteratively Performing Inversion Based on a Function
    Publication number: 20090005993
    Abstract: To characterize an earth subterranean structure using a measurement assembly including electromagnetic (EM) receivers and one or more EM sources, measured voltage data collected by EM receivers in response to transmission by one or more EM sources is received. Based on a model, predicted EM data is computed. Inversion is iteratively performed according to a function that computes a difference between the measured voltage data and a product of a term containing the predicted EM data and a term containing distortion data that accounts at least for distortion effect by an environment of the measurement assembly. The inversion is iteratively performed to solve for parameters of the model and the distortion data.
    Type: Application
    Filed: June 27, 2007
    Publication date: January 1, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Aria Abubakar, Tarek Habashy, David Alumbaugh, Ping Zhang, Guozhong Gao, Jianguo Liu