Patents by Inventor Dong Weixin

Dong Weixin 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).

  • Real-time fracture detection and fracture orientation estimation using tri-axial induction measurements
    Patent number: 9606257
    Abstract: A method for determining existence of a fracture in a formation surrounding a wellbore drilled through subsurface rock formations includes calculating vertical resistivity, horizontal resistivity, apparent formation dip, apparent formation azimuth and axial resistivity for a plurality of longitudinal instrument spacings using measurements from a triaxial induction well logging instrument disposed in the formation. A spread in the axial resistivity values is determined and the axial resistivity spread threshold therefrom. Fracture indicator values and fracture orientation values are calculated from transverse components of the triaxial induction measurements. Presence of a fracture is indicated when at least one of the fracture indicator value exceeds a selected threshold, the axial resistivity spread exceeds the spread threshold and when the apparent formation dip exceeds a selected threshold.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: March 28, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Peter T. Wu, Dong Weixin, Thomas D. Barber, Dean Homan
  • Real-Time Fracture Detection And Fracture Orientation Estimation Using Tri-Axial Induction Measurements
    Publication number: 20120065889
    Abstract: A method for determining existence of a fracture in a formation surrounding a wellbore drilled through subsurface rock formations includes calculating vertical resistivity, horizontal resistivity, apparent formation dip, apparent formation azimuth and axial resistivity for a plurality of longitudinal instrument spacings using measurements from a triaxial induction well logging instrument disposed in the formation. A spread in the axial resistivity values is determined and the axial resistivity spread threshold therefrom. Fracture indicator values and fracture orientation values are calculated from transverse components of the triaxial induction measurements. Presence of a fracture is indicated when at least one of the fracture indicator value exceeds a selected threshold, the axial resistivity spread exceeds the spread threshold and when the apparent formation dip exceeds a selected threshold.
    Type: Application
    Filed: August 25, 2011
    Publication date: March 15, 2012
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Peter T. Wu, Dong Weixin, Thomas D. Barber, Dean Homan