Patents by Inventor Sean Crawley

Sean Crawley 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).

  • DETERMINING PROPERTIES OF A SUBTERRANEAN FORMATION USING AN ACOUSTIC WAVE EQUATION WITH A REFLECTIVITY PARAMETERIZATION
    Publication number: 20230305176
    Abstract: Methods and systems described herein are directed to determining properties of a subterranean formation using an acoustic wave-equation with a novel formulation in terms of a velocity model and a reflectivity model of the subterranean formation. The acoustic wave equation may be used with full-waveform inversion to simultaneously build velocity and reflectivity models of a subterranean formation. The velocity and reflectivity models may be employed for quantitative interpretation. The velocity and reflectivity models may be employed to determine impedance and density of the subterranean formation for prospectivity assessment. The acoustic wave equation may be also used with least-squares reverse time migration in the image or data domains, to build a reflectivity model of the subterranean formation with enhanced resolution and amplitude fidelity.
    Type: Application
    Filed: March 20, 2023
    Publication date: September 28, 2023
    Applicant: PGS Geophysical AS
    Inventors: Norman Daniel Whitmore, JR., Jaime Ramos-Martinez, Sean Crawley, Yang Yang, Alejandro Antonio Velenciano Mavilio, Nizar Chemingui
  • Determining properties of a subterranean formation using an acoustic wave equation with a reflectivity parameterization
    Patent number: 11609349
    Abstract: Methods and systems described herein are directed to determining properties of a subterranean formation using an acoustic wave-equation with a novel formulation in terms of a velocity model and a reflectivity model of the subterranean formation. The acoustic wave equation may be used with full-waveform inversion to build high-resolution velocity and reflectivity models of a subterranean formation. The acoustic wave equation may be also used with least-squares reverse time migration in the image and space domains, to build a reflectivity model of the subterranean formation with enhanced resolution and amplitude fidelity. The velocity and reflectivity models of materials that form the subterranean formation reveal the structure and lithology of features of the subterranean formation and may reveal the presence of oil and natural gas reservoirs.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: March 21, 2023
    Assignee: PGS Geophysical AS
    Inventors: Norman Daniel Whitmore, Jr., Jaime Ramos-Martinez, Sean Crawley, Yang Yang, Alejandro Antonio Valenciano Mavilio, Nizar Chemingui
  • DETERMINING PROPERTIES OF A SUBTERRANEAN FORMATION USING AN ACOUSTIC WAVE EQUATION WITH A REFLECTIVITY PARAMETERIZATION
    Publication number: 20210103065
    Abstract: Methods and systems described herein are directed to determining properties of a subterranean formation using an acoustic wave-equation with a novel formulation in terms of a velocity model and a reflectivity model of the subterranean formation. The acoustic wave equation may be used with full-waveform inversion to build high-resolution velocity and reflectivity models of a subterranean formation. The acoustic wave equation may be also used with least-squares reverse time migration in the image and space domains, to build a reflectivity model of the subterranean formation with enhanced resolution and amplitude fidelity. The velocity and reflectivity models of materials that form the subterranean formation reveal the structure and lithology of features of the subterranean formation and may reveal the presence of oil and natural gas reservoirs.
    Type: Application
    Filed: October 1, 2020
    Publication date: April 8, 2021
    Inventors: Norman Daniel Whitmore, JR., Jaime Ramos-Martinez, Sean Crawley, Yang Yang, Alejandro Antonio Valenciano Mavilio, Nizar Chemingui
  • Velocity model update with an inversion gradient
    Patent number: 10353092
    Abstract: The present disclosure is related to a velocity model update with a full waveform inversion gradient. At least one method can include updating a velocity model of a subsurface, which can include suppressing high wavenumber components of the velocity model provided by reflected energy with a decomposed full waveform inversion gradient. Low wavenumber components can be preserved in the velocity model.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: July 16, 2019
    Assignee: PGS Geophysical AS
    Inventors: Sean Crawley, Jaime Ramos-Martinez, Alejandro Antonio Valenciano Mavilio, Nizar Chemingui
  • Velocity Model Update with an Inversion Gradient
    Publication number: 20170168178
    Abstract: The present disclosure is related to a velocity model update with a full waveform inversion gradient. At least one method can include updating a velocity model of a subsurface, which can include suppressing high wavenumber components of the velocity model provided by reflected energy with a decomposed full waveform inversion gradient. Low wavenumber components can be preserved in the velocity model.
    Type: Application
    Filed: November 30, 2016
    Publication date: June 15, 2017
    Applicant: PGS Geophysical AS
    Inventors: Sean Crawley, Jaime Ramos-Martinez, Alejandro Antonio Valenciano Mavilio, Nizar Chemingui