2024 Full wavefield migration

Full wavefield migration

Author: hpdt

August undefined, 2024

WebSep 30, 2024 · Least-squares full-wavefield migration (LS-FWM) directly computes the earth's reflectivity, thereby avoiding crosstalk noise often observed in imaging using high … WebABSTRACT Elastic full-waveform inversion (FWI) can provide accurate and high-resolution subsurface parameters. However, its high computational cost prevents the application of this method to large-scale field-data scenarios. To mitigate this limitation, we have developed a target-oriented elastic FWI methodology based on a redatuming step that relies upon an …

FWI Imaging: Full-wavefield imaging through full-waveform …

WebSimilar to imaging using primary data, every event now (primaries and surface-related multiples) is accounted for in the primary event and primary subevent of the multiple, therefore leading to a ‘linear’ relationship between the forward modelled data and reflectivity [if the effect of internal multiples is excluded—note that if full wavefield migration … WebA 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 acoustic wave equation is modified by including at least one secondary source term, and based on a seismic acquisition configuration, either calculating the seismic signals that would be … populated state of india

A comparison of shot-encoding schemes for wave-equation migration

WebAbstract We present a least-squares solution for depth migration of the full reflected wavefield. The algorithm combines primary and high-order reflected energy and significantly enhances the image illumination and resolution compared to those of conventional migration. Least-squares full-wavefield migration (LS-FWM) directly computes the … WebThe ultimate goal in survey design is to obtain the acquisition parameters that enable acquiring the most affordable data that fulfill certain image quality requirements. A method that allows optimization of the receiver geometry for a fixed source distribution is proposed. The former is parameterized with a receiver density function that ... WebJan 25, 2011 · In this paper, we discuss the concept of full-wavefield migration and demonstrate its potential as an imaging tool for vertical seismic profiling data using … populatefunctionpassmanager

Full-waveform inversion for full-wavefield imaging: Decades in …

(PDF) Full Wavefield Migration - Utilization of Multiples in …

WebAug 5, 2014 · We demonstrate a novel workflow using reflections, refractions and multiples for building highly accurate PSDM velocity models for a complex geological setting. By combining wavelet shift tomography, full waveform inversion and separated wavefield imaging, we are able to produce high-resolution velocity models that are ideally suited for … WebJan 7, 2024 · January 7, 2024. Depth migration of the full reflected wavefield, including primary and sea-surface reflected energy (also referred to as free surface multiples or … populated wow classic serversWebLeast-squares migration (LSM) has been shown to be able to produce high-quality migration images, but its computational cost is considered to be too high for practical imaging. We have developed a multisource least-squares migration algorithm (MLSM) to increase the computational efficiency by using the blended sources processing … sharks ocean city

"WebAug 1, 2024 · At the same time, the developed full-wavefield migration (FWM) methodology can handle internal multiples in an inversion-based imaging process. However, … " - Full wavefield migration

Full wavefield migration

Imaging with surface-related multiples to overcome large acquisition ...

WebFeb 2, 2016 · However, full-wavefield migration involves a forward modelling process that uses the estimated seismic image (i.e., the reflectivities) to generate the … WebAug 22, 2014 · In these vision papers on seismic imaging, full wavefield migration and joint migration inversion are formulated in terms of a closed-loop, estimation algorithm that can be physically explained by an iterative double-focusing process (full wavefield Common Focus Point technology). A critical module in this formulation is forward …

Did you know?

WebABSTRACT Surface-related-multiple wavefields constitute redundant information in conventional migration and can often be difficult to attenuate. However, when used for migration, multiple wavefields can improve subsurface illumination. Unfortunately, the process of imaging using multiples involves the management of crosstalk, which largely …

WebIn the last decade the seismic imaging industry has begun collecting data volumes with a substantial amount of data redundancy through new acquisition geometries including: wide-azimuth, rich-azimuth and full-azimuth geometries. The increased redundancy significantly improves image quality in areas with complex geology, but requires considerably greater … WebCompared with a conventional migration image, the reflectivity image directly output from FWI often provides additional structural information with better illumination and higher signal-to-noise ratio naturally as a result of many iterations of least-squares fitting of the full-wavefield data, including diving waves and multiples.

WebJun 26, 2024 · The full wavefield migration (FWM) was proposed by Berkhout (2011, 2012, 2014b), which utilizes the full wavefield, including the multiples (surface-related multiple and internal multiple) in the migration. FWM is an inversion process. The residual between the simulated data and the actual data is minimized to update the imaging result. WebAug 22, 2014 · In these vision papers on seismic imaging, full wavefield migration and joint migration inversion are formulated in terms of a closed‐loop, estimation algorithm that can be physically explained by an iterative double‐focusing process (full wavefield Common Focus Point technology). A critical module in this formulation is forward …

WebAug 22, 2014 · In this vision paper on seismic imaging, Full-Wavefield Migration and Joint Migration Inversion are formulated in terms of a closed-loop estimation algorithm that can be physically explained by an iterative double focusing process (full-wavefield common-focus-point technology). A critical module in this formulation is forward modelling ...

WebDavydenko, M, Verschuur, DJ & van Groenestijn, GJA 2015, Full Wavefield Migration Applied to Field Data. in s.n. (ed.), Proceedings 77th EAGE Conference & Exhibition … populated us cityWebThe proposed full wavefield algorithm (FWM) makes use of two-way wave theory that is formulated in terms of one-way wavefields. We show that the current migration algorithms for primary reflections can be easily … populate englishWebAug 22, 2014 · In this vision paper on seismic imaging, full wavefield migration and joint migration inversion are formulated in terms of a closed-loop, estimation algorithm that can be physically explained by an iterative double focusing process (full wavefield Common-Focus-Point technology). A critical module in this formulation is forward modelling ... populated with or byWebBy disposing the collected seismic data with the methods of band-pass filtering, first arrival picking, energy balance, reflection wave extraction, wavefield separation, velocity analysis, and depth migration, the distribution of the front adverse geological body and the mechanical parameters of the rock can be obtained. sharks ocean city md newsWebTo apply reverse‐time migration to prestack, finite‐offset data from variable‐velocity media, the standard (time zero) imaging condition must be generalized because each point in the image space has a different image time (or times). This generalization is the excitation‐time imaging condition, in which each point is imaged at the one‐way traveltime from the … sharks ocean city njWebABSTRACT Laser ultrasound (LU) data acquired on cylindrical core samples effectively probe the physical properties of geologic materials. Although most LU analyses focus on … sharks ocean isle beachWebFeb 2, 2016 · ABSTRACT Multiple scattering is usually ignored in migration algorithms, although it is a genuine part of the physical reflection response. When properly included, multiples can add to the illumination of the subsurface, although their crosstalk effects are removed. Therefore, we introduce full‐wavefield migration. It includes all multiples and … sharks ocean