2024 Least-squares full wavefield migration

Least-squares full wavefield migration

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Nettet1. jan. 2024 · We present a least-squares solution for depth migration of the full reflected wavefield. The algorithm combines primary and high-order reflected energy and … NettetA wavefield decomposition methodology can also be incorporated into a least-squares reverse time migration (LSRTM) algorithm. The separation of wavefields based on the …

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Nettet9. aug. 2024 · Sun M, Dong L, Yang J, Huang C, Liu Y (2024) Elastic least-squares reverse time migration with density variations. Geo-physics 83:S533–S547. Google Scholar Tan S, Huang LJ (2014) Least-squares reverse-time migration with a wavefield separation imaging condition and updated source wavefields. Geophysics … Nettet28. apr. 2024 · In particular, Hu et al. (2016) combined LSM with Gaussian beam migration (GBM) to improve the efficiency of wavefield-based LSM. Liu and Peter (2024) proposed a one-step LSRTM based on a ... trion facebook

Least-squares DSR migration using a common angle imaging …

Nettet13. jun. 2024 · Least-Squares Migration (LSM) solutions are designed to produce images of the subsurface corrected for wavefield distortions caused by acquisition and propagation effects. They implicitly solve for the earth reflectivity by means of data residual reduction in an iterative fashion, which usually demands intensive computation. http://yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-51d5bb18-751c-4b1a-ae44-f8cbd516b482 NettetSummary We present a Least-Squares inversion solution for depth migration of the full seismic wavefield including both primaries and high-order reflections. Conventional seismic processing uses only primary reflections for imaging. It treats high-order reflected events as noise and removes them before migration. Separated Wavefield IMaging … trion fixtures

Frontiers A new scheme of wavefield decomposed elastic least …

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Nettet3. jan. 2024 · Therefore, we develop a least-squares full-wavefield reverse time migration (LSFWM), which is implemented based on a two-way modeling engine with vector reflectivity and the corresponding adjoint ... NettetLeast-square reverse time migration (LSRTM) can obtain high-resolution and high-amplitude preserved imaging results. Compared to the traditional migration methods, … trion field developmentNettetMoving least squares is a method of reconstructing continuous functions from a set of unorganized point samples via the calculation of a weighted least squares measure … trion filter company

"NettetRelatively simple examples based on the full wave-equation allow us to better assess the performance and appropriateness of the LS smoothing regularization in terms of AVP/AVA preservation. The results are promising and suggest that least-squares migration, although computationally expensive, holds benefits for producing high " - Least-squares full wavefield migration

Least-squares full wavefield migration

Least-squares reverse-time migration with a wavefield-separation ...

Nettet13. mar. 2024 · ABSTRACT Reverse time migration (RTM), as a state-of-the-art imaging technique, provides outstanding imaging capabilities due to its use of a full wave equation. Least-squares RTM (LSRTM) seeks the solution of a linearized wave equation via the minimization of a data misfit term; however, the quality of the results decreases when … NettetNemeth C. Wu and G. T. Schuster "Least-squares migration of incomplete reflection data" Geophysics vol. 64 no. 1 pp. 208-221 Jan ... Choi and T. Alkhalifah "Time-domain full-waveform inversion of exponentially damped wavefield using the deconvolution-based objective function" Geophysics vol. 83 no. 2 pp. R77-R88 ...

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Nettet1. aug. 2024 · ABSTRACT Waveform inversion based on least-squares reverse time migration (LSRTM) usually involves Born modeling, which models the primary-only …

Nettet4. okt. 2024 · In least-squares migration, we pose seismic imaging as a linear inverse problem; this provides at least two advantages. First, we are able to incorporate model … Nettet8. nov. 2024 · Elastic least-squares reverse time migration can image the multicomponent seismic recordings. However, on the one hand, without considering the intrinsic attenuation of the subsurface, it may produce blurred reflectivity images with incorrect positions of reflectors for seismic recordings with strong attenuation.

Nettet10. mar. 2024 · Since the diffraction is much weaker than the reflection, it is difficult to separate the diffraction from the full wavefield. We use a plane-wave destruction ... diffraction from the full data. In order to obtain a high-accuracy and amplitude-preserving imaging profile, we use the least-squares reverse time migration (LSRTM) ... NettetHowever, the imaging of multiples can involve challenges related to acquisition and migration. The acquisition offset, trace spacing, and towing direction are all key factors …

Nettet4. aug. 2014 · We developed a new least-squares RTM (LSRTM) method to directly image steeply dipping fault zones. The method uses a wavefield-separation imaging …

NettetBerkhout, A. G., 2014 b, Review paper: An outlook on the future of seismic imaging, Part II: Full-wavefield migration: Geophysical Prospecting, 62, 931–949, doi: 10.1111/1365 … trion flexibleNettetA method for modelling and migrating seismic data, that includes using an acoustic wave equation and a spatial distribution of one or more earth-model parameters. The … trion filter replacementNettetWe developed a new least-squares RTM (LSRTM) method to directly image steeply dipping fault zones. The method uses a wavefield-separation imaging condition and … trion fitness benchNettetHowever, migrating the full seismic wavefield (including primaries and multiples) often results in strong artifacts due to crosstalk between different orders of reflections. In the presentation, we discuss a least-squares inversion solution for Full Wavefield Migration (FWM) that is capable of imaging all reflection modes in the data. trion flex accountNettetWe present a Least-Squares inversion solution for depth migration of the full seismic wavefield including both primaries and high-order reflections. Conventional seismic … trion flexible spendingNettet15. jun. 2024 · Viscoacoustic least‐squares reverse time migration of different‐order free‐surface multiples. Article. Oct 2024. Jinli Li. Yingming Qu. Mengjie Li. Zhenchun Li. … trion flexible spending loginNettetWide Azimuth Interpolation Daniel Trad* Veritas DGC, Inc., Calgary, Alberta, Canada [email protected] and Jeff Deere and Scott Cheadle Veritas DGC, Inc., Calgary, Alberta, Canada Abstract Summary Seismic processing techniques, such as migration, have strict requirements on information content in the input seismic data. trion flex spending login