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Keywords: velocity model
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Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594656
...-wave velocity model can be obtained from its group or phase velocity dispersion curve. The applicability of this method is demonstrated with the data from a 2-m thick coal seam from the Rydułtowy mine, Poland. Derived quasi 2D S-wave velocity profile strongly correlates with the mechanical quality...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584006
... model. We tested the approach on both synthetic and real datasets. Our FWI results have revealed satisfying salt recovery as well as detailed velocity features in areas close to salt bodies. reservoir characterization velocity drop velocity model complex salt province flooding upstream oil...
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
... of the newly-linearised, exact inverse problem. approximation vasconcelo marchenko linearisation reservoir characterization applied geoscience velocity model marchenko scheme artefact equation upstream oil & gas inverse problem velocity profile full waveform inversion mlsi-a background...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583892
... control upstream oil & gas applied geoscience reservoir characterization production logging downhole das das production monitoring microseismic monitoring ambiguity exploration geophysicist 10 fiber optic cable velocity model surface array surface geophone characteristic function...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583642
... Full-waveform inversion has been established as a standard tool for building high-resolution velocity models. To take full advantage of such models, the migration algorithm must be capable of handling fine-scale geo-bodies and sharp contrasts while affordably producing high-frequency migration...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583593
... area exploration geophysicist 10 microtremor array measurement investigation area san leandro coyote hill east san francisco bay area reservoir characterization hayward fault velocity model dispersion curve northeast side upstream oil & gas microtremor measurement francisco bay area...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583785
... describes the workflow and ends with comparing the final image and final velocity model over a full-fold overlap area. cip tomography expanded abstract full-waveform inversion fwi applied geoscience iteration workflow interpretation reservoir characterization building workflow velocity model...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3567496
...-linear finite element to improve accuracy without sacrificing efficiency. Specifically, our optimized stiffness and mass matrices require 4 grid points per wavelength for <0.5% error in velocities. Numerical results from the homogeneous, 3D unbounded 2-layer and the 3D SEG salt velocity models bolster...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3574350
.... As Rayleigh wave is generally the dominant signal in surface seismic data, the proposed method is established based on the derivation of Rayleigh wave dispersion from single station 6C data. A subsurface velocity model can be immediately constructed by consolidating the dispersion curves derived from...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3579445
... Data fusion comprehensively processes the data obtained by different sensors, then coordination, optimization and integration are carried out to extract more information, thereby improving decision-making ability. Velocity model is the core of seismic imaging, but due to the incompleteness...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3577774
... misfit function is designed for an improved convexity with respect to shifted patterns in the seismic signals - and therefore to the kinematic errors of the velocity model. In principles, this shall make it possible to successfully invert the data starting from a crude initial model. Here we show how...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3585407
... for subsurface velocity model. With ambient noise wavefield propagation direction and the amplitude information recorded by the two legs of a near L-shaped DAS array, we derive a ratio of Rayleigh to Love waves in the DAS ambient noise recordings. In the synthetic examples, we assume the ambient noise sources...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3586323
... affected by the allochthonous salt emplacement in the Upper Eocene and Mesozoic rafted sections in the area, making the velocity model building a challenge in this region. To better represent this geological complexity, we present a case study in which we have taken a multidisciplinary approach to model...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3587037
... the overburden and reservoir layers. The legacy narrow-azimuth streamer acquisition and processing were not able to resolve the geologic complexity, thus the resulting velocity model and seismic images are inadequate to support exploration and field development in the fractured basement. We present the first...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581912
... Velocity model building is an essential step in seismic exploration, which runs through the whole process of seismic data acquisition, processing, and interpretation. The velocity information is conventionally obtained by iterative optimization methods such as full-waveform inversion...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582659
... artificial intelligence troy thompson velocity model inversion preconditioner applied geoscience convergence mrinal sinha gary hampson l-bfg gradient Reflection FWI with an augmented wave equation and quasi-Newton adaptive gradient scheme James McLeman*, Tim Burgess, Mrinal Sinha, Gary Hampson...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582052
... imaging loop geometry salt mask velocity model interpretation Automatic salt geometry update using deep learning in iterative FWI-RTM workflows Tao Zhao*, Chunpeng Zhao, Anisha Kaul, and Aria Abubakar, Schlumberger SUMMARY salt geometry in subsequent imaging loops (Figure 1). Substituting...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582729
... time dataset velocity model transfer learning epoch microseismic event location exploration geophysicist 10 grid Microseismic event location using arti cial neural networks Denis Anikiev*, GFZ German Research Centre for Geosciences, Umair bin Waheed, King Fahd University of Petroleum...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583002
... better acquisition geometry coupled with processing to address these challenges. applied geoscience heterogeneity raw data velocity model oristaglio migration exploration geophysicist 10 seam arid model reservoir characterization field data density contrast arid model processing...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583443
... The studied deep-water turbidite oil field is located in the western Green Canyon area of the Gulf of Mexico. The area features high-dipping Cenozoic sediment truncations against salt flanks. Several attempts have been made to obtain an accurate velocity model using streamer data and a top-down...

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