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Least-squares gaussian beam migration

Nettet18. okt. 2015 · Our method combines the advantages of the least-squares migration and the efficiency of the Gaussian beam propagator. This approach is implemented in the … NettetWe propose a true-amplitude Gaussian beam migration (GBM) method under the framework of seismic illumination compensation. A novel scheme based on the GBM is developed to estimate the point spread functions, with which the illumination compensation can be efficiently implemented in the local wave-number domain.

Image domain least-squares migration with a Hessian matrix …

NettetAs the aim of least-squares migration, the proposed illumination-compensated Gaussian beam migration produces true-amplitude images in subsalt areas, which facilitates the seismic interpretation of subsalt structures. Nettet1. feb. 2024 · This review paper includes: summarizing the development of the seismic imaging; overviewing the principles of three typical imaging methods, including common reflection surface (CRS) stack, migration-based Gaussian-beam migration (GBM) and reverse-time migration (RTM), and inversion-based least-squares reverse-time … shut off onedrive windows 11 https://compare-beforex.com

Elastic common-receiver Gaussian beam migration of 4C ocean …

NettetAs the demand for ore resources increases, the target for mineral exploration gradually shifts from shallow to deep parts of the Earth (>1 km). However, for the ore-hosting strata, it is difficult to obtain high-resolution images by using the electromagnetic method. Seismic full waveform inversion (FWI) is an optimization algorithm which aims at … Nettet10. apr. 2024 · We propose a least-squares migration approach based on the time-domain Gaussian beam summation, which helps to balance subsurface illumination … NettetLeast-squares Gaussian beam migration in viscoacoustic media. Article. Oct 2024; Yubo Yue; Yujin Liu; Yaonan Li; Yunyan Shi; Because of amplitude decay and phase dispersion of seismic waves ... the paediatric dentist gold coast

Elastic Least-Squares Gaussian Beam Imaging With Point

Category:Time-domain least-squares migration using the Gaussian beam …

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Least-squares gaussian beam migration

Least-squares Gaussian beam migration in elastic media

Nettet1. apr. 2016 · We have developed a test of the feasibility of using the Gaussian beam as the wavefield extrapolating operator for the LSM, denoted as least-squares Gaussian … http://en.dzkx.org/article/doi/10.6038/cjg2024O0509

Least-squares gaussian beam migration

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NettetA theory of least-squares Gaussian beam migration (LSGBM) is presented to optimally estimate a subsurface reflectivity. In the iterative inversion scheme, a Gaussian beam … Nettet15. jun. 2024 · Least-square reverse-time migration (LSRTM) is a powerful tool to image subsurface reflectivity with high resolution. It has the ability to reduce migration artifacts, balance amplitudes, and improve imaging resolution. However, the large amount of computation cost is one of its challenging problems, especially for 3D problems.

NettetGaussian beam migration (GBM) is an effective imaging method that has the ability to image multiple arrivals while preserving the advantages of ray-based methods. We have extended this method to linearized least-squares imaging for elastic waves in isotropic media. We have dynamically transformed the multicomponent data to the principal …

Nettet1. sep. 2024 · Request PDF On Sep 1, 2024, Jidong Yang and others published Angle-domain least-squares Gaussian beam migration Find, read and cite all the research … Nettet10. apr. 2024 · beams with different take-off angles propagate independentl y, which enables Gaussian beam migration (GBM) to utilize multipath information to image …

Nettet1. jan. 2024 · However, least-squares Gaussian beam migration in. data domain is computationally expensive, es pecially when. faced with elastic or 3-D cases. In this …

http://hs.link.springer.com.dr2am.wust.edu.cn/article/10.1007/s10712-023-09777-w?__dp=https shut off one drive windows 11NettetLeast-squares migration (LSM) is a data-fitting imaging approach seeking the seismic reflectivity image of the most accurate amplitude and optimal resolution. ... The training data for CNN consist of 10–15% of all shot gathers, with the Gaussian beam migrated shot gathers as the input and the LSM shot gathers as the target. shut off onedrive windows 10Nettet18. okt. 2015 · We proposed a new approach by utilizing the Gaussian beam as the wavefield extrapolating operator for least-squares migration, denoted as least-squares Gaussian beam migration. Our method combines the advantages of the least-squares migration and the efficiency of the Gaussian beam propagator. shut off past tenseNettet19. mar. 2024 · Gaussian beam migration (GBM) is an effective imaging method that has the ability to image multiple arrivals while preserving the advantages of ray-based … the paedophile protection racketNettetMitigating Velocity Errors in Least-Squares Imaging Using Angle-Dependent Forward and Adjoint Gaussian Beam Operators 15 November 2024 Surveys in Geophysics, Vol. 42, No. 6 Q-compensated reverse-time migration for natural gas hydrate using fractional viscoacoustic wave equation the paella and tapas place mt airyNettetAs the aim of least‐squares migration, the proposed illumination‐compensated Gaussian beam migration produces true‐amplitude images in subsalt areas, which facilitates the seismic interpretation of subsalt structures. shut off photo editingNettet23. mar. 2016 · Elastic migration has been widely paid attention by employing the vector processing of multicomponent seismic data. Ray based elastic Kirchhoff migration has such properties as high flexibility and high efficiency. However, it has failed to solve many problems caused by multipath. On the other hand, elastic reverse-time migration … shut off outlook alerts