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Volume 72, Issue 2
  • E-ISSN: 1365-2478

Abstract

Abstract

In viscoacoustic least‐squares reverse time migration methods, the reflectivity image associated with the factor is negligible, inverting only the velocity () parameter or ‐related variables such as squared slowness or bulk modulus. However, the factor influences the amplitude and phase of the seismic data, especially in basins containing gas reservoirs or storing . Therefore, the factor and its associated parameters must be considered in the context of viscoacoustic least‐squares reverse time migration. Thus, we propose a multiparameter viscoacoustic least‐squares reverse time migration procedure, which obtains the inverse of bulk modulus (κ) and the magnitude (τ) simultaneously. We derive and implement the multiparameter forward and adjoint pair Born operators and the gradient formulas concerning κ and τ parameters. Then, we apply these derivations in our proposed multiparameter approach, which can produce images with better balanced amplitudes and more resolution than conventional reverse time migration images.

© 2024 European Association of Geoscientists & Engineers. © 2023 European Association of Geoscientists & Engineers.
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/content/journals/10.1111/1365-2478.13436
2024-01-30
2025-07-19

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/content/journals/10.1111/1365-2478.13436
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Multiparameter least‐squares reverse time migration using the viscoacoustic‐wave equation
Geophysical Prospecting 72, 550 (2024); https://doi.org/10.1111/1365-2478.13436
/content/journals/10.1111/1365-2478.13436
/content/journals/10.1111/1365-2478.13436
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  • Article Type: Research Article
Keyword(s): imaging; inverse problem; parameter estimation

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