1-20 of 1389
Keywords: wavefield
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584040
... The process of wavefield decomposition is a notorious challenge in seismic and electromagnetic imaging, because often only specific components of the full measured wavefield are targeted during the processing, while other components are undesired. This specifically applies to the separation...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583720
... anisotropic media reservoir characterization wavefield pseudo-pure-qp-wave equation operator media upstream oil & gas equation university anisotropy calgary separated scalar qp-wave vti medium first-order qp-wave propagator A first-order qP-wave propagator in 2D VTI media He Liu...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583558
... wavefield exploration geophysicist 10 linearised fwi Towards exact linearised full waveform inversion via Marchenko redatuming Leon Diekmann (Utrecht University), Ivan Vasconcelos (Utrecht University), Dominic Cummings (University of Edin- burgh) and Andrew Curtis (University of Edinburgh) SUMMARY...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581829
... waves (P-waves). In this study I define a coupled system of quasi qS V - and qP-wave radiation in a vertical plane by combining radial-horizontal and vertical sources for anisotropic media. Radiated wavefields at group velocity polar angles complement each other, and after four-component (4C) source...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3579622
... complex structures due to inaccurate paraxial ray tracing for backward wavefields. Aiming at this problem, we firstly use the input velocity field information to get an adaptive focused beam parameter, which makes the seismic beam focus on the whole ray and improves the wavefields construction accuracy...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3564832
... the dimensionality of the problem. Using local solvers, we can reduce the size of the computational domain to small areas while preserving the fidelity of the elastic wavefield reconstruction. Both the full waveform and extracted amplitudes and phases from seismic reflections are used in geophysical inversions...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3579450
... Distributed acoustic sensing (DAS) is gaining popularity for conducting vertical seismic profiling (VSP). Being a spatially densely sampled recording of the acoustic wavefield, DAS data provides a truly continuous measurement along the well instead of a discrete array of points with geophone VSP...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3567608
... In viscoacoustic reverse-time migration (RTM), attenuation compensation can be implemented by reversing the sign of the dissipation term and keeping the dispersion term unchanged for backward wavefield extrapolation. Although the Q-compensated RTM scheme can effectively correct attenuation...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3576626
... shaped cables were recently presented, which improve the broadside sensitivity of DAS systems. We present a pseudospectral algorithm that can model the seismic gathers acquired with straight and helical cables with DAS systems. The use of an accurate wavefield interpolation technique allows us to obtain...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584127
... Recently developed physics-informed neural network (PINN) for solving for the scattered wavefield in the Helmholtz equation showed large potential in seismic modeling because of its flexibility, low memory requirement, and no limitations on the shape of the solution space. However, the predicted...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582713
... common-shot gathers to plane-wave gathers via linear Radon transform; secondly, it uses a recursive local Radon transform algorithm to decompose the extrapolated receiver-side wavefields into different components with different incident angles; thirdly, it efficiently generates the pseudo dip-angle...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583091
... PP/PS images and ADCIGs are calculated and compared. reservoir characterization imaging condition wavefield exploration geophysicist 10 reverse time migration upstream oil & gas parameterization expanded abstract ps image applied geoscience scalar imaging condition geophysics...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583082
... Efficient angle measurement and wavefield decomposition are important in advanced angle-domain seismic imaging and full waveform inversion. Most angle measurement methods are developed in time domain due to the widely applied time-domain full-wave propagators, whereas investigations in frequency...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583300
..., and that the resolution improvement can be obtained from the reconstruction of the S-wave velocity model, which highlights the important contribution of 3C geophone dataset. upstream oil & gas gradient building obc acquisition streamer acquisition artificial intelligence wavefield brossier wave-equation...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583112
... Full waveform inversion (FWI) is a multivariate PDE-constrained optimization problem, which jointly updates the wavefields and model parameters from partial measurements of the wavefields. A classical technique to solve such problems is the method of Lagrange multipliers where the wave-fields...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583530
... that the Green’s function vanishes before the direct wave. Even though we retrieve such refracted waves, they are caused by the injection of the direct wave into suciently detailed background velocity and density models instead of operations of the Marchenko algorithm on the recorded wavefields. refracted...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583452
..., the feasibility and effectiveness of the research method are verified by numerical tests. applied geoscience wavefield exploration geophysicist 10 wavelet seismic data internal multiple geophysics crosstalk artifact upstream oil & gas imaging migration boundary compensation artifact...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584072
... Inspired by recent work on extended image volumes that lays the ground for randomized probing of extremely large seismic wavefield matrices, we present a memory frugal and computationally efficient inversion methodology that uses techniques from randomized linear algebra. By means of a carefully...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583658
... workflow (conversion of 1C DAS to 1C geophone) is to be considered to reduce migration artifacts in such configuration. vertical seismic profile migration artifact receiver upstream oil & gas wavefield migration method domain correction reservoir characterization image domain correction...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584030
... Wavefield solutions are critical for applications ranging from imaging to full waveform inversion. These wavefields are often large, especially for 3D media, and multiple point sources, like Green’s functions. A recently introduced framework based on neural networks admitting functional...

Product(s) added to cart

Close Modal