公开(公告)号：US11609349B2

公开(公告)日：2023-03-21

申请号：US17060763

申请日：2020-10-01

Applicant: PGS Geophysical AS

Inventor： Norman Daniel Whitmore, Jr. ,  Jaime Ramos-Martinez ,  Sean Crawley ,  Yang Yang ,  Alejandro Antonio Valenciano Mavilio ,  Nizar Chemingui

IPC: G01V1/28 ,  G01V1/30

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.

公开(公告)号：US20230305176A1

公开(公告)日：2023-09-28

申请号：US18123656

申请日：2023-03-20

Applicant: PGS Geophysical AS

Inventor： Norman Daniel Whitmore, JR. ,  Jaime Ramos-Martinez ,  Sean Crawley ,  Yang Yang ,  Alejandro Antonio Velenciano Mavilio ,  Nizar Chemingui

IPC: G01V1/28 ,  G01V1/30 ,  G01V1/38

CPC classification number: G01V1/282 ,  G01V1/301 ,  G01V1/3843 ,  G01V2210/675

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. The velocity and reflectivity models reveal the structure and lithology of features of the subterranean formation and may reveal the presence of oil and natural gas reservoirs.

公开(公告)号：US20210103065A1

公开(公告)日：2021-04-08

申请号：US17060763

申请日：2020-10-01

Applicant: PGS Geophysical AS

Inventor： Norman Daniel Whitmore, JR. ,  Jaime Ramos-Martinez ,  Sean Crawley ,  Yang Yang ,  Alejandro Antonio Valenciano Mavilio ,  Nizar Chemingui

IPC: G01V1/28 ,  G01V1/30

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.

公开(公告)号：US20240310540A1

公开(公告)日：2024-09-19

申请号：US18600002

申请日：2024-03-08

Applicant: PGS Geophysical AS

Inventor： Yang Yang ,  Nizar Chemingui ,  Norman Daniel Whitmore, JR. ,  Jaime Ramos-Martinez

IPC: G01V1/28 ,  G01V1/30 ,  G01V1/38

CPC classification number: G01V1/282 ,  G01V1/303 ,  G01V1/306 ,  G01V1/3808

Abstract: Methods and systems described herein are directed to determining properties of a subterranean formation using an acoustic wave-equation in terms of a velocity model and a vector reflectivity model of the subterranean formation. The acoustic wave equation may be used with simultaneous inversion to simultaneously build velocity and pre-stack reflectivity in the form of angle gathers of a subterranean formation. The velocity and angle gathers may be employed for quantitative interpretation. The velocity and vector reflectivity may be employed to determine relative impedance and relative density of the subterranean formation for prospectivity assessment. The acoustic wave equation may extend into the angle domain to build angle gathers of the subterranean formation with enhanced resolution and amplitude fidelity. The velocity, angle gathers, and vector reflectivity reveal the structure and lithology of features of the subterranean formation and may reveal the presence of oil and natural gas reservoirs.