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Keywords: modeling
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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-2021-3593878
... of reservoir in the target area, through the innovation of seismic inversion method, a stochastic simulation inversion method based on configuration modeling is proposed, which improves the reservoir prediction accuracy under the condition of Paleogene sparse drilling. Through the characterization of reservoir...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581895
... To realize the reduction of calculation time and memory usage for seismic wave modeling on large scale model, we propose a 3D trapezoid-grid finite difference time domain (FDTD) method. It adopts the size-increasing trapezoid-grid mesh to fits the increasing trend in depth of seismic wave...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582073
... We present a fully explicit finite-difference modeling scheme for the scalar acoustic wave equation in tilted transversely isotropic media, which is computationally efficient in terms of speed and memory. The proposed method uses 2D local spatial operators that are optimized in the least-squares...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583399
... We suggest a new philosophy of seismic modeling in the context of seismic history matching (SHM). The concept of dual equivalence models, which is honoring the fundamental differences between disciplines, is introduced and demonstrated on geophysical and reservoir flow models. We construct...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3585521
...3D radio-frequency electromagnetic wave modelling with an optimized frequency-domain nite- difference scheme Polina Zheglova , Colin Farquharson and Alison Malcolm, Department of Earth Sciences, Memorial University of Newfoundland, St. John s, NL, Canada SUMMARY using direct factorization...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3587537
... conductivity anomalies given their conductivity many orders of magnitude higher than that of the surrounding geologic units. High-resolution monitoring of the fracturing requires quantitative understanding of the casings’ EM responses, but the numerical modeling is non-trivial because of the extreme...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3590214
... The energized casing source electromagnetic (EM) surveys are widely used for subsurface characterization, reservoir fluid mapping, and time-lapse monitoring. To carry out this promising technology, a crucial requisite is the capability of fast numerical modeling of EM field response...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3589262
... Distributed acoustic sensing (DAS) is an emerging technology for recording VSP and microseismic data to monitor hydraulic fracturing in unconventional reservoirs. Forward modeling can provide crucial guidance in both the design of the DAS experiments and in the later phases of 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-2021-3585379
... the CO 2 movement. A feasibility study of the CSEM method, including 1D and 3D modeling and a field noise test, was conducted to determine its effectiveness in monitoring CO 2 in the Broom Creek and Deadwood Formations. The study results demonstrate that the CSEM method can be used for CO 2 storage...
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 International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3410414
... The generalized stiffness reduction method (GSRM) was previously proposed to absorb the artificial reflections in seismic wave modeling in arbitrary elastic anisotropic media. However, the traditional PML technique and the original GSRM lose their effectiveness of removing the artificial edge...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427205
... The Columbus Basin offshore Trinidad has been a challenging area for seismic imaging due to the presence of substantial velocity heterogeneity and strong azimuthal anisotropy resulting from abundant gas clouds and complex fault structures. A tilted orthorhombic (TOR) model is required to address...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424516
... This work describes a method for computing the full acoustic seismic wavefield using a new two-way equation parameterized by vector reflectivity and velocity. This method is contrasted with full wavefield modeling using variable density and demonstrates the equivalence of the two methods. Thus...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425121
... We present the results of electromagnetic (EM) studies over deep copper-sulphide orebody in the South Urals. This study is aimed mainly at testing the EM method’s capability of detecting orebodies of such shape, depth, and composition. The 3D modeling showed the potential of detecting the deep...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427899
... A Born modeling method for single-scattering waves in 2D visco-acoustic medium using Gaussian beams is presented in this paper. Based on the linear scattering theory, the method employs Gaussian beams to obtain the Green’s function and takes the influence of the medium’s viscosity on the seismic...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426465
... energy on event depth is first confirmed through synthetic modeling, with dispersion curves predicted from an analytical solution being used to separate between direct arrivals and guided waves. A qualitative differentiation criterion is developed, and then successfully applied to real data that suffer...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428007
... machine learning upstream oil & gas probabilistic joint-inversion optimization problem seismic data iteration workflow reservoir characterization modeling joint inversion geophysics seg international exposition application matrix coupling inversion cost function artificial...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427630
... With the advent of OBC acquisition technology, and the desire to make full use of node data, accurate modeling of seismic waves near the seafloor interface becomes increasingly important. However, there are well-known challenges to the finite difference elastic modeling of a fluid-solid...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427957
... involve injecting alternating electric current into the Earth through long transmitter dipoles, and making measurements of the Earth’s response at an array of EM receivers. Historically, CSAMT data have been interpreted using readily available MT modeling algorithms, but this means using only the data...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425809
... Full 3D electromagnetic modeling based on optimal multiscale Lebedev’s discretization of Maxwell’s equations with general anisotropy is used for reliable modeling and quality control of ultra-deep electromagnetic (EM) measurements. With this fast and robust full 3D anisotropic modeling software...

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