1-20 OF 167 RESULTS FOR

moveout

Results shown limited to content with bounding coordinates.
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
Journal Article
Published: 25 October 2024
Petroleum Geoscience (2024) 30 (4): petgeo2023-151.
... analysis in seismic processing to improve the image quality and to estimate the anisotropic model parameters. Using azimuthal residual moveout analysis, the direction of azimuthal anisotropy in the reservoir was predicted, and it was found that the results are consistent with fracture orientations obtained...
FIGURES
First thumbnail for: Non-stationary inversion of seismic data for fract...
Second thumbnail for: Non-stationary inversion of seismic data for fract...
Third thumbnail for: Non-stationary inversion of seismic data for fract...
Journal Article
Journal: Geophysics
Published: 24 May 2024
Geophysics (2024) 89 (4): R329–R337.
...Yanis Saadallah; Arild Buland ABSTRACT Residual moveout (RMO) can have a severe impact on seismic amplitude-variation-with-offset (AVO) analysis. It is, therefore, common practice to quality control and correct the processed seismic data for RMO before AVO analysis. However, a complicating factor...
FIGURES
First thumbnail for: Bayesian joint residual <span class="search-highli...
Second thumbnail for: Bayesian joint residual <span class="search-highli...
Third thumbnail for: Bayesian joint residual <span class="search-highli...
Journal Article
Journal: Geophysics
Published: 08 December 2023
Geophysics (2024) 89 (1): WA233–WA246.
... have encountered a lower velocity than the primaries, and thus multiples are expected to exhibit an increasing residual moveout (RMO) along the offset dimension. Although suffering from their own set of limitations, separation-based methods are of a computationally simpler nature and can be applied...
FIGURES
First thumbnail for: An in-depth study of U-net for seismic data condit...
Second thumbnail for: An in-depth study of U-net for seismic data condit...
Third thumbnail for: An in-depth study of U-net for seismic data condit...
Journal Article
Published: 10 April 2023
Bulletin of the Seismological Society of America (2023) 113 (4): 1652–1663.
... that waveform moveouts are clearly visible, and that the standard deviation of the audio recordings is a straightforward yet promising metric that could help quantify burst damage. Although improvements are needed before mines can routinely use this monitoring strategy, DAS‐based seismoacoustic arrays may...
FIGURES
First thumbnail for: Seismoacoustic Monitoring of a Longwall Face Using...
Second thumbnail for: Seismoacoustic Monitoring of a Longwall Face Using...
Third thumbnail for: Seismoacoustic Monitoring of a Longwall Face Using...
Journal Article
Journal: The Leading Edge
Published: 01 February 2023
The Leading Edge (2023) 42 (2): 124–132.
..., thus extending the approximation of residual moveout correction inherent in traditional velocity model building approaches. Moreover, FWI is capable of inverting information from the entire wavefield (i.e., early arrivals, reflections, refractions, and multiple energy) rather than from a subset...
FIGURES
First thumbnail for: Toward high-fidelity imaging: Dynamic matching FWI...
Second thumbnail for: Toward high-fidelity imaging: Dynamic matching FWI...
Third thumbnail for: Toward high-fidelity imaging: Dynamic matching FWI...
Journal Article
Journal: Geophysics
Published: 27 October 2022
Geophysics (2022) 87 (6): C191–C200.
... with the generalized moveout approximation (GMA) for P and S waves is applied in numerical examples. We find that our proposed approximation indicates higher accuracy than the GMA counterpart for P and S waves. The error sensitivity of P and S waves in the depth, vertical velocity ratio, and the anellipticity...
FIGURES
First thumbnail for: Perturbation-based <span class="search-highlight">...
Second thumbnail for: Perturbation-based <span class="search-highlight">...
Third thumbnail for: Perturbation-based <span class="search-highlight">...
Journal Article
Published: 10 June 2022
Seismological Research Letters (2022) 93 (5): 2719–2730.
FIGURES
First thumbnail for: Lithospheric Structure in Central‐East China from ...
Second thumbnail for: Lithospheric Structure in Central‐East China from ...
Third thumbnail for: Lithospheric Structure in Central‐East China from ...
Journal Article
Journal: Geophysics
Published: 07 June 2022
Geophysics (2022) 87 (4): U135–U153.
...Chao Ding; Jianwei Ma ABSTRACT Migration velocity analysis is a crucial seismic processing step that aims to translate residual moveout (RMO) in common-image gathers (CIGs) into velocity updates. However, this is often an iterative process that requires migration and significant human effort...
FIGURES
First thumbnail for: Automatic migration velocity analysis via deep lea...
Second thumbnail for: Automatic migration velocity analysis via deep lea...
Third thumbnail for: Automatic migration velocity analysis via deep lea...
Journal Article
Journal: Geophysics
Published: 13 April 2022
Geophysics (2022) 87 (3): C49–C61.
...Song Jin; Alexey Stovas; Xiangyun Hu ABSTRACT Reflection moveout approximations written as explicit functions of offset are convenient tools commonly applied in seismic data modeling, processing, and inversion. The generalized moveout approximation (GMA) has a flexible functional form...
FIGURES
First thumbnail for: Improved generalized <span class="search-highlight...
Second thumbnail for: Improved generalized <span class="search-highlight...
Third thumbnail for: Improved generalized <span class="search-highlight...
Journal Article
Journal: Geophysics
Published: 29 March 2022
Geophysics (2022) 87 (3): U81–U92.
... estimation via analysis of converted-wave moveout and tomography is still immature. We derive a general residual moveout (RMO) relation as a function of incident angle or as a reflection angle for converted waves, which can be used for converted-wave tomography based on angle-domain common-image gathers. Our...
FIGURES
First thumbnail for: Residual <span class="search-highlight">moveout</s...
Second thumbnail for: Residual <span class="search-highlight">moveout</s...
Third thumbnail for: Residual <span class="search-highlight">moveout</s...
Journal Article
Journal: Geophysics
Published: 20 October 2021
Geophysics (2021) 86 (6): S417–S430.
... as residual moveout (RMO) effects induced by erroneous velocity models. Surface-offset extensions have proven to be a robust alternative to angle gathers as well as subsurface extensions when applied to narrow-azimuth data acquisitions, especially when using erroneous velocity models. As such, least-squares...
FIGURES
First thumbnail for: Efficient iterative prestack least-squares reverse...
Second thumbnail for: Efficient iterative prestack least-squares reverse...
Third thumbnail for: Efficient iterative prestack least-squares reverse...
Journal Article
Journal: Geophysics
Published: 12 October 2021
Geophysics (2021) 86 (6): C173–C184.
... axis. Our approximation for traveltime is a modified version of the extended generalized moveout approximation that comprises six parameters. Our direct approximations for the ray parameter and curvature use new algebraically simple equations with three parameters. We define these parameters for each...
FIGURES
First thumbnail for: Approximations for traveltime, slope, curvature, a...
Second thumbnail for: Approximations for traveltime, slope, curvature, a...
Third thumbnail for: Approximations for traveltime, slope, curvature, a...
Journal Article
Journal: Geophysics
Published: 27 September 2021
Geophysics (2021) 86 (6): S355–S369.
... accordingly to achieve better signal alignment before stacking. Specifically, we have developed a 2.5D MF reflection traveltime equation that explicitly takes into account the midpoint dispersion and cross-dip effects. The new formulation corrects for normal, inline, and crossline dip moveouts (DMOs...
FIGURES
First thumbnail for: 2.5D multifocusing imaging of crooked-line seismic...
Second thumbnail for: 2.5D multifocusing imaging of crooked-line seismic...
Third thumbnail for: 2.5D multifocusing imaging of crooked-line seismic...
Journal Article
Journal: Geophysics
Published: 23 November 2020
Geophysics (2020) 85 (6): V497–V506.
... ) . Next, the rank-reduced matrix L ( f ) can be calculated by extracting the first L principal components, that is, L ( f ) = ∑ i = 1 L σ i u i v i T . (5) The first field example (Figure  9 ) is a stacked data set after applying dip-moveout...
Journal Article
Journal: The Leading Edge
Published: 01 November 2020
The Leading Edge (2020) 39 (11): 819–827.
... at Brady Hot Springs, Nevada, USA. Although this data set was acquired with the original intent of monitoring changes in a geothermal reservoir, it is shown that the data can also be used to identify and monitor vehicle movements on a nearby highway. Analysis of moveout patterns and recorded amplitudes...
FIGURES
First thumbnail for: Using DAS to investigate traffic patterns at Brady...
Second thumbnail for: Using DAS to investigate traffic patterns at Brady...
Third thumbnail for: Using DAS to investigate traffic patterns at Brady...
Journal Article
Journal: Geophysics
Published: 23 July 2020
Geophysics (2020) 85 (5): O71–O82.
...Luke Decker; Qunshan Zhang ABSTRACT We have developed a novel application of dynamic time warping (DTW) for correcting residual moveout in image gathers, enhancing seismic images, and determining azimuthal anisotropic orientation and relative intensity when moveout is caused by wave propagation...
FIGURES
First thumbnail for: Quantifying and correcting residual azimuthal anis...
Second thumbnail for: Quantifying and correcting residual azimuthal anis...
Third thumbnail for: Quantifying and correcting residual azimuthal anis...
Journal Article
Journal: Geophysics
Published: 21 January 2020
Geophysics (2020) 85 (2): C61–C70.
...Véronique Farra; Ivan Pšenčík ABSTRACT We present an approximate nonhyperbolic P-wave moveout formula applicable to horizontally layered media of moderate or weak anisotropy of arbitrary symmetry and orientation. Anisotropy symmetry and its orientation may differ from layer to layer. Instead...
FIGURES
First thumbnail for: P-wave reflection-<span class="search-highlight">m...
Second thumbnail for: P-wave reflection-<span class="search-highlight">m...
Third thumbnail for: P-wave reflection-<span class="search-highlight">m...
Journal Article
Journal: Geophysics
Published: 22 November 2019
Geophysics (2020) 85 (1): U1–U20.
...Yanadet Sripanich; Sergey Fomel; Jeannot Trampert; William Burnett; Thomas Hess ABSTRACT Parameter estimation from reflection moveout analysis represents one of the most fundamental problems in subsurface model building. We have developed an efficient moveout inversion method based on the process...
FIGURES
First thumbnail for: Probabilistic <span class="search-highlight">moveo...
Second thumbnail for: Probabilistic <span class="search-highlight">moveo...
Third thumbnail for: Probabilistic <span class="search-highlight">moveo...
Journal Article
Journal: Geophysics
Published: 09 October 2019
Geophysics (2019) 84 (6): C269–C279.
... phase velocity equation is readily calculated, there is not an explicit equation for the exact group velocity as a function of group angle nor for the traveltime as a function of offset. Accordingly, we have developed new approximate phase velocity, group velocity, and moveout equations for acoustic...
FIGURES
First thumbnail for: Acoustic wave propagation in orthorhombic media: P...
Second thumbnail for: Acoustic wave propagation in orthorhombic media: P...
Third thumbnail for: Acoustic wave propagation in orthorhombic media: P...
Journal Article
Journal: Geophysics
Published: 12 August 2019
Geophysics (2019) 84 (5): C229–C237.
...Shibo Xu; Alexey Stovas ABSTRACT The moveout approximations are commonly used in seismic data processing such as velocity analysis, modeling, and time migration. The anisotropic effect is very obvious for a converted wave when estimating the physical and processing parameters from the real data...
FIGURES
First thumbnail for: Traveltime approximation for converted waves in el...
Second thumbnail for: Traveltime approximation for converted waves in el...
Third thumbnail for: Traveltime approximation for converted waves in el...