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Keywords: imaging condition
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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-2021-3583091
... The imaging condition plays a crucial role in elastic imaging during constructing subsurface high-wavenumber images. The angle domain multicomponent images enable us to better retrieve petrophysical properties. Modern elastic imaging conditions are mainly designed based on specific P and S mode...
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 underground interfaces, and reverse time migration can realize the correct imaging of multiples, a joint imaging method of primary and internal multiples is studied in order to reduce the calculation cost of multiple suppression and improve imaging accuracy. Firstly, the imaging condition for the data...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594126
... a synthetic example with the elastic Marmousi model and an Oklahoma field data example. resolution elastic media geometric-mean reverse-time migration upstream oil & gas imaging receiver us government imaging condition source image reservoir characterization applied geoscience 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-2021-3594362
... experiments, the tooling has been used at scale for large production 3D surveys. optimization problem cofii framework operation reservoir characterization upstream oil & gas imaging condition jopenvelope cloud computing virtual machine nonlinear optimization geophysics 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-2021-3581364
... on the Transmitted Wave for simulating wave field propagation as it is based in solving the two-way wave equation. The objective of this In pre-stack depth migration imaging, according to the study is to develop a wave propagation simulation method cross-correlation imaging condition (Claerbout, 1971...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424632
... The cross-correlation imaging condition requires that the source and receiver wavefields should be synchronously available. Opposite propagation directions of those wavefields, nevertheless, pose a challenge between computer memory and computation complexity. We present a local cross-correlation...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427923
... angle gather least-square migration seg international exposition deconvolution imaging condition frequency wem adcig iterative least-square migration lsm upstream oil & gas imaging condition migration lswem angle domain angle image illumination exploration geophysicist 10 cross...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3418133
... We study the relationship between the elastic FWI density gradient and the inverse scattering imaging condition. Due to the chain rule an elastic density gradient in different parameterization arrives at different forms. We show that in Vp-Vs-density parameterization the density gradient reduces...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425618
... imaging condition ray-based kirchhoff migration exploration geophysicist 10 traveltime computation kwett sog ray tracing seg international exposition image stack reservoir characterization wave equation velocity model traveltime map conventional ray-based kirchhoff migration...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427796
... In this paper, we discuss the properties of the waveform impedance sensitivity kernel for elastic reverse time migration. A connection is made between the elastic energy norm imaging condition and the impedance sensitivity kernel. It is shown analytically that the imaging condition using...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426685
... 8 Presentation Type: Poster upstream oil & gas shragge exploration geophysicist 10 reservoir characterization objective function velocity model incorrect velocity model artificial intelligence imaging condition microseismic data seg international exposition operator image...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426049
... and efficient Q-RTM method, in which a regularization term is introduced into the decoupled constant-Q fractional Laplacians viscoacoustic wave equation, to suppress the high-frequency instabilities during the attenuation compensation. Meanwhile, a Q compensated excitation amplitude image condition is conducted...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3416120
... velocity model building upstream oil & gas wavefield tomographic part reverse time migration imaging condition lsrtm fwi reflectivity model receiver gather Velocity model building using FWI and LSRTM: case study on 3D OBN dataset acquired from offshore Saudi Arabia Young Seo Kim*, Maxim...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216654
... annual international meeting gaussian diving-wave imaging artifact operator wavefield artifact diving wave weighting function migration imaging artifact wavenumber imaging condition upstream oil & gas Loewenthal , D. , P. L. , Stoffa , and E. L. , Faria , 1987...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3196450
... divergence and curl ( and ). In contrast with the usual elastic imaging conditions that cross-correlates vertical displacements to obtain the P-wave image and vertical and horizontal displacements to obtain the converted wave image, we devised P- and S-wave imaging conditions using the adjoint state method...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3209062
... ABSTRACT Using both compressional and shear waves, elastic reverse-time migration (RTM) is helpful to image complex structures and estimate lithology information. Wavefield separation and imaging condition are two important recipes for elastic RTM. Using the vector Helmholtz decomposition, we...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3211346
... background velocity geophysics seg international exposition gradient reservoir characterization high-wavenumber artifact energy norm waveform inversion information artifact perturbation imaging condition inversion velocity perturbation background model Alkhalifah , T. , 2015...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214913
... during imaging, but there are also difference. The difference comes from different physical meanings of the up/down separated images. Furthermore, we present a new workflow that combines a cost efficient up/down imaging condition and a post-imaging separation method. A numerical example using the Sigsbee...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3203816
... ABSTRACT Reverse-time-migration (RTM) with zero-lag cross-correlation imaging condition introduces strong low-frequency artifacts due to the strong contrasts in the velocity model. Laplacian filtering is an easy and important way to attenuate the RTM low-frequency artifacts. Inspired from...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215056
... ABSTRACT A modified inversion-based imaging condition is proposed to estimate acoustic impedance perturbations from near angle stacked images, based on the theory of amplitude preserving reverse time migration (RTM). The proposed imaging condition consists of multiplying the summation...

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