Patents by Inventor Zitao Xu

Zitao Xu 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: 10922782
    Abstract: Systems and methods for mapping vertices from one coordinate system in an earth model to another coordinate system in a two-dimensional (2D) array without disrupting the topology of the vertices.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 16, 2021
    Assignee: LANDMARK GRAPHICS CORPORATION
    Inventors: Zitao Xu, Genbao Shi, ChiKang David Chien, Maurice Gehin, Andres Cesar Callegari, Jeffrey Marc Yarus
  • Patent number: 10628552
    Abstract: A method includes generating a faulted point cloud representing a faulted geological formation including a first fault block having a first surface, a second fault block having a second surface, and a fault formed therebetween and having a fault surface, generating a first fault trace from an intersection of the first surface and the fault surface and a second fault trace from an intersection of the second surface and the fault surface, generating a first fault polygon using the first and second fault traces, generating a center polyline, generating third and fourth fault traces separated from the first and second fault traces, respectively, generating a second fault polygon using the third and fourth fault traces, expanding a first area including the first and third fault traces, expanding a second area including the second and fourth fault traces, and generating an unfaulted point cloud representing an unfaulted geological formation.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: April 21, 2020
    Assignee: LANDMARK GRAPHIC CORPORATION
    Inventors: Genbao Shi, Jeffrey Marc Yarus, Zitao Xu, Maurice Gehin
  • Publication number: 20200043131
    Abstract: Systems and methods for mapping vertices from one coordinate system in an earth model to another coordinate system in a two-dimensional (2D) array without disrupting the topology of the vertices.
    Type: Application
    Filed: December 16, 2016
    Publication date: February 6, 2020
    Applicant: Landmark Graphics Corporation
    Inventors: Zitao XU, Genbao SHI, ChiKang David CHIEN, Maurice GEHIN, Andres Cesar CALLEGARI, Jeffrey Marc YARUS
  • Patent number: 10345482
    Abstract: In various examples, a method includes storing one or more data structures on a storage device, the one or more data structures identifying a plurality of faults in a geographical formation and a plurality of fault blocks on either side of the plurality of faults in the geographic formation; for each pair of faults blocks on opposite sides of a fault identified in the one or more data structures: determining, using at least one processor, a fault polygon of a respective pair of fault blocks with respect to a fault of the plurality of faults; and calculating a matching factor between the respective pair of fault blocks based on the fault polygon; selecting a pair of fault blocks to merge based on the calculated matching factor; and updating the one or more data structures to indicate the selected pair of fault blocks has been merged.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: July 9, 2019
    Assignee: LANDMARK GRAPHICS CORPORATION
    Inventors: Zitao Xu, Genbao Shi, Chikang David Chien, Jeffrey Yarus, Richard L. Chambers
  • Patent number: 10319140
    Abstract: A consecutive set of data points, P1, P2, P3, and P4, is selected. A first line is created through P1 and P3. A first tangent vector originating at P2, parallel to the first line, is created. A second line through P2 and P4 is created. A second tangent vector through P3 is created. The second tangent vector is parallel to the second line. A baseline through P2 and P3 is created. A Bezier curve between P2 and P3 is created, wherein the Bezier curve has a degree. The degree of the Bezier curve is determined based on a comparison of the first tangent vector, the second tangent vector, and the baseline.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: June 11, 2019
    Assignee: Landmark Graphics Corporation
    Inventors: Zitao Xu, Genbao Shi, Andres Cesar Callegari, ChiKang David Chien, Jeffrey Marc Yarus
  • Publication number: 20180336309
    Abstract: A method includes generating a faulted point cloud representing a faulted geological formation including a first fault block having a first surface, a second fault block having a second surface, and a fault formed therebetween and having a fault surface, generating a first fault trace from an intersection of the first surface and the fault surface and a second fault trace from an intersection of the second surface and the fault surface, generating a first fault polygon using the first and second fault traces, generating a center polyline, generating third and fourth fault traces separated from the first and second fault traces, respectively, generating a second fault polygon using the third and fourth fault traces, expanding a first area including the first and third fault traces, expanding a second area including the second and fourth fault traces, and generating an unfaulted point cloud representing an unfaulted geological formation.
    Type: Application
    Filed: June 7, 2016
    Publication date: November 22, 2018
    Inventors: Genbao SHI, Jeffrey Marc YARUS, Zitao XU, Maurice GEHIN
  • Patent number: 9892555
    Abstract: Systems and methods for reducing the amount of texture cache memory needed to store a texture atlas by using uniquely grouped refined triangles to create each texture atlas.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: February 13, 2018
    Assignee: LANDMARK GRAPHICS CORPORATION
    Inventors: Zitao Xu, Venkatraman Viswanathan, Scott Senften, Charles Sembroski, Ya Sun, Mary Cole
  • Patent number: 9817792
    Abstract: Systems and methods for creating a surface in a faulted space, which includes using interpolation techniques.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: November 14, 2017
    Assignee: LANDMARK GRAPHICS CORPORATION
    Inventors: Genbao Shi, Zitao Xu, Jeffrey Yarus, Richard L Chambers, Randy Guetter
  • Publication number: 20170148209
    Abstract: A consecutive set of data points, P1, P2, P3, and P4, is selected. A first line is created through P1 and P3. A first tangent vector originating at P2, parallel to the first line, is created. A second line through P2 and P4 is created. A second tangent vector through P3 is created. The second tangent vector is parallel to the second line. A baseline through P2 and P3 is created. A Bezier curve between P2 and P3 is created, wherein the Bezier curve has a degree. The degree of the Bezier curve is determined based on a comparison of the first tangent vector, the second tangent vector, and the baseline.
    Type: Application
    Filed: July 7, 2015
    Publication date: May 25, 2017
    Inventors: Zitao Xu, Genbao Shi, Andres Cesar Callegari, ChiKang David Chien, Jeffrey Marc Yarus
  • Patent number: 9645280
    Abstract: A method to generate a global grid may include storing at least one data structure representing a plurality of fault blocks associated with one or more faults in a geographic formation; selecting two fault blocks associated with a fault of the one or more faults; changing the position of a first of the two fault blocks in the at least one data structure representative of a shift of the first fault block towards the other fault block of the two fault blocks to position the center of gravity of a fault boundary of the first fault block with the center of gravity of a fault boundary of the other fault block; aligning the first fault block with the other fault block according to a permitted level of conflict between fault blocks; and updating the at least one data structure to indicate a merging of the two selected fault blocks.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: May 9, 2017
    Assignee: LANDMARK GRAPHICS CORPORATION
    Inventors: Zitao Xu, Genbao Shi, Chikang David Chien, Jeffrey Yarus, Richard L. Chambers
  • Publication number: 20160350263
    Abstract: Systems and methods for creating a surface in a faulted space, which includes using interpolation techniques.
    Type: Application
    Filed: August 10, 2016
    Publication date: December 1, 2016
    Inventors: Genbao Shi, Zitao Xu, Jeffrey Yarus, Richard L. Chambers, Randy Guetter
  • Patent number: 9436658
    Abstract: Systems and methods for creating a surface in a faulted space, which includes using interpolation techniques.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: September 6, 2016
    Assignee: Landmark Graphics Corporation
    Inventors: Genbao Shi, Zitao Xu, Jeffrey Yarus, Richard L. Chambers, Randy Guetter
  • Publication number: 20160216403
    Abstract: In various examples, a method includes storing one or more data structures on a storage device, the one or more data structures identifying a plurality of faults in a geographical formation and a plurality of fault blocks on either side of the plurality of faults in the geographic formation; for each pair of faults blocks on opposite sides of a fault identified in the one or more data structures: determining, using at least one processor, a fault polygon of a respective pair of fault blocks with respect to a fault of the plurality of faults; and calculating a matching factor between the respective pair of fault blocks based on the fault polygon; selecting a pair of fault blocks to merge based on the calculated matching factor; and updating the one or more data structures to indicate the selected pair of fault blocks has been merged.
    Type: Application
    Filed: November 26, 2013
    Publication date: July 28, 2016
    Applicant: Landmark Graphics Corporation
    Inventors: Zitao Xu, Genbao Shi, Chikang David Chien, Jeffrey Yarus, Richard L. Chambers
  • Patent number: 9378587
    Abstract: Systems and methods for reducing the amount of texture cache memory needed to store a texture atlas by using uniquely grouped refined triangles to create each texture atlas.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: June 28, 2016
    Assignee: Landmark Graphics Corporation
    Inventors: Zitao Xu, Venkatraman Viswanathan, Scott Senften, Charles Sembroski, Ya Sun, Mary Cole
  • Publication number: 20160155266
    Abstract: Systems and methods for reducing the amount of texture cache memory needed to store a texture atlas by using uniquely grouped refined triangles to create each texture atlas.
    Type: Application
    Filed: February 9, 2016
    Publication date: June 2, 2016
    Inventors: Zitao Xu, Venkatraman Viswanathan, Scott Senften, Charles Sembroski, Ya Sun, Mary Cole
  • Patent number: 9342923
    Abstract: Systems and methods for reducing the amount of texture cache memory needed to store a texture atlas by using uniquely grouped refined triangles to create each texture atlas.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: May 17, 2016
    Assignee: Landmark Graphics Corporation
    Inventors: Zitao Xu, Venkatraman Viswanathan, Scott Senften, Charles Sembroski, Ya Sun, Mary Cole
  • Publication number: 20160116636
    Abstract: A method to generate a global grid may include storing at least one data structure representing a plurality of fault blocks associated with one or more faults in a geographic formation; selecting two fault blocks associated with a fault of the one or more faults; changing the position of a first of the two fault blocks in the at least one data structure representative of a shift of the first fault block towards the other fault block of the two fault blocks to position the center of gravity of a fault boundary of the first fault block with the center of gravity of a fault boundary of the other fault block; aligning the first fault block with the other fault block according to a permitted level of conflict between fault blocks; and updating the at least one data structure to indicate a merging of the two selected fault blocks.
    Type: Application
    Filed: September 3, 2013
    Publication date: April 28, 2016
    Inventors: Zitao Xu, Genbao Shi, Chikang David Chien, Jeffery Varus, Richard L. Chambers
  • Publication number: 20150248784
    Abstract: Systems and methods for reducing the amount of texture cache memory needed to store a texture atlas by using uniquely grouped refined triangles to create each texture atlas.
    Type: Application
    Filed: June 27, 2012
    Publication date: September 3, 2015
    Inventors: Zitao Xu, Venkatraman Viswanathan, Scott Senften, Charles Sembroski, Ya Sun, Mary Cole
  • Publication number: 20150109295
    Abstract: Systems and methods for reducing the amount of texture cache memory needed to store a texture atlas by using uniquely grouped refined triangles to create each texture atlas.
    Type: Application
    Filed: December 29, 2014
    Publication date: April 23, 2015
    Inventors: Zitao Xu, Venkatraman Viswanathan, Scott Senften, Charles Sembroski, Ya Sun, Mary Cole
  • Patent number: 8660797
    Abstract: Calculating a fault throw. At least some embodiments are methods of determining an underground surface or horizon including: identifying an occluded zone residing between a first and second faults, the occluded zone not penetrated by an actual borehole, and the first and second faults intersect an expected location of the surface; calculating a fault throw for the first fault; and calculating the underground surface using the fault throw. Calculating the fault throw may include: calculating a first pseudo depth at a first end of the first fault, the calculating the first pseudo depth using at least one actual depth value that resides across the first fault from the first end; calculating a second pseudo depth at a second end of the first fault, the second end distinct from the first end; and determining the fault throw using the first and second pseudo depths.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: February 25, 2014
    Assignee: Landmark Graphics Corporation
    Inventors: Zitao Xu, Richard L. Chambers