Patents by Inventor Gary Eppler

Gary Eppler 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).

  • Patent number: 10767473
    Abstract: Methods and systems for detecting impact of induced micro-fractures in a subsurface formation are disclosed. The method includes determining an unloading effective stress (?ul) in a formation sample taken from a wellbore drilled into the subsurface formation, determining a fracture closure stress (?cl) of the formation sample, determining that the unloading effective stress (?ul) is greater than or equal to the fracture closure stress (?ul), and in response to determining that unloading effective stress (?ul) is greater than or equal to the fracture closure stress (?ul), operating the well system to inhibit impact of micro-fractures in the wellbore.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: September 8, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Hui-Hai Liu, Jilin Zhang, Gary Eppler
  • Publication number: 20200217766
    Abstract: Methods, systems, and computer-readable medium to perform operations for identifying fracture barriers in a well. The operations include converting rebound hardness values of a rock specimen from the well to unconfined compressive strength (UCS) values, where each of the rebound hardness values corresponds to a respective coordinate of a measurement grid imposed on the specimen. The operations further include, for each column of the grid, plotting the UCS values versus depth. Further, the operations include mapping, based on a maximum UCS value and a minimum UCS value, a relative strength contour plot for the specimen. Yet further, the operations include mapping, based on a fixed strength range, an absolute strength contour plot for the specimen. In addition, the operations include determining, based on the relative strength contour, the absolute strength contour, and mineralogy of the rock specimen, that the rock specimen is indicative of a fracture barrier in the well.
    Type: Application
    Filed: January 7, 2020
    Publication date: July 9, 2020
    Applicant: Saudi Arabian Oil Company
    Inventors: Ji Soo Lee, David Jacobi, Gary Eppler, Joshua Brothers
  • Publication number: 20190368350
    Abstract: Methods and systems for detecting impact of induced micro-fractures in a subsurface formation are disclosed. The method includes determining an unloading effective stress (?ul) in a formation sample taken from a wellbore drilled into the subsurface formation, determining a fracture closure stress (?cl) of the formation sample, determining that the unloading effective stress (?ul) is greater than or equal to the fracture closure stress (?ul), and in response to determining that unloading effective stress (?ul) is greater than or equal to the fracture closure stress (?ul), operating the well system to inhibit impact of micro-fractures in the wellbore.
    Type: Application
    Filed: May 30, 2019
    Publication date: December 5, 2019
    Inventors: Hui-Hai Liu, Jilin Zhang, Gary Eppler