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公开(公告)号：US10935681B2
公开(公告)日：2021-03-02
申请号：US15994273
申请日：2018-05-31
Applicant: CGG SERVICES SAS
Inventor： Benjamin Roure
Abstract: Methods for seismic exploration of an underground formation including at least one anisotropic layer perform a joint velocity-variation-with-azimuth, VVAz, and amplitude-variation-with-azimuth, AVAz, inversion using the azimuthal angle stacks to obtain a structural representation of the underground formation. The structural representation is used to generate scenarios for exploiting resources in at least one layer of the underground formation.
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公开(公告)号：US11215721B2
公开(公告)日：2022-01-04
申请号：US15329458
申请日：2015-08-18
Applicant: CGG SERVICES SAS
Inventor： Benjamin Roure
Abstract: PP and PS seismic data are jointly inverted in a stratigraphic grid, using different time axes for PP and PS reflections. A ratio of PP and of PS waves'travel times inside a same layer cell maintained to be a function of a ratio of a P-wave propagation velocity and of an S-wave propagation velocity therein. Since PP and PS seismic amplitudes and travel times are due to elastic properties of the same structure, they can be inverted at the same time to provide better estimates of these elastic properties.
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公开(公告)号：US11360227B2
公开(公告)日：2022-06-14
申请号：US16927364
申请日：2020-07-13
Applicant: CGG SERVICES SAS
Inventor： Benjamin Roure
Abstract: Methods and apparatuses characterize fracture orientations in orthorhombic adjacent layer. Seismic data with azimuthal coverage enables calculating Fourier coefficients of reflectivity at an interface between the orthorhombic adjacent layers. The phases of 2nd and 4th FCs may be used to infer the fracture orientations in the orthorhombic adjacent layers. Analysis of 2nd and 4th Fourier coefficients' phases for different incidence angles may indicate that the fracture orientations in the orthorhombic adjacent layers are aligned, orthogonal, at 45°, that one of the layers is isotropic, etc.
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