A Comparative Study of Three Hessian Approximations in Wave-Equation Migration

Research output: Contribution to conferencePaperpeer-review

Abstract

Enhanced pre-stack depth migration, characterized by improved resolution and amplitudes, ensures a more accurate representation of the subsurface, proving essential for reducing the likelihood of geological misinterpretations and facilitating informed decision-making in seismic exploration. However, obtaining high-resolution images with preserved amplitudes through standard depth migration could face several hurdles known as migration artifacts. Iterative least-squares migration (LSM) was developed to address these migration artifacts. However, the convergence rate of LSM using a gradient descent approach tends to be slow. Several researchers have attempted to achieve computational efficiency in linearized LSM through gradient preconditioning. In the context of iterative least-squares wave-equation migration, this extended abstract compares three minimization approaches that differ in error functions and gradient preconditioning—including the depth-dependent Hessian approximation inverse—through two numerical examples, one with an inverse-crime scenario and the other with a non-inverse-crime scenario.
Original languageEnglish
Number of pages5
DOIs
Publication statusPublished - 2024
Event85th EAGE Annual Conference & Exhibition 2024: Technology and talent for a secure and sustainable energy future - NOVA Spektrum Convention Centre, Oslo, Lillestrøm, Norway
Duration: 10 Jun 202413 Jun 2024
https://eageannual.org/eage-annual-2024

Conference

Conference85th EAGE Annual Conference & Exhibition 2024
Abbreviated titleEAGE Annual 2024
Country/TerritoryNorway
CityOslo, Lillestrøm
Period10/06/2413/06/24
Internet address

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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