Accelerating Seismic Modelling and Inversion by Exploiting Wavefield Smoothness
Lead Research Organisation:
UNIVERSITY OF OXFORD
Department Name: Earth Sciences
Abstract
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Organisations
People |
ORCID iD |
| Tarje Nissen-Meyer (Primary Supervisor) | |
| Claudia Haindl (Student) |
Studentship Projects
| Project Reference | Relationship | Related To | Start | End | Student Name |
|---|---|---|---|---|---|
| NE/R01051X/1 | 30/09/2017 | 30/05/2024 | |||
| 2232103 | Studentship | NE/R01051X/1 | 30/09/2017 | 29/09/2021 | Claudia Haindl |
| Description | A novel efficient computational method for modeling seismic waves, originally developed for global-scale simulations, has been adapted to local-scale problems. The method has been benchmarked against established local-scale modeling software using an input model similar to what may be encountered during hydrocarbon exploration. It was demonstrated that the innovative approach to save computational cost can indeed lead to a relative speed-up in typical local-scale settings. This is especially promising since there are several potentially speedup-boosting options yet to be implemented. The method operates by exploiting certain properties of the seismic wavefield and further study will be conducted to analyse how these properties change in different settings. This is crucial to identify which use-cases would benefit most from the new method, and it may also lead to a more thorough understanding of wavefields in general. |
| Exploitation Route | In specific settings, the novel method can be used to perform seismic modeling and inversion significantly faster. It may be employed for resource exploration purposes as well as for regional-scale earthquake risk analysis and, in both cases, this ultimately lowers the cost of data analysis. |
| Sectors | Energy Environment Other |
| Title | AxiSEM3D (after local scale adaptation) |
| Description | AxiSEM3D is a fully elastic 3D seismic modeling method which saves computational cost utilising a novel approach we refer to as azimuthal complexity adaptation (ACA). At its core, it is a spectral-element method. It can handle local-scale, regional scale (curved) and global-scale input models, features solid-fluid interactions, and several options for absorbing boundaries. |
| Type Of Material | Computer model/algorithm |
| Year Produced | 2019 |
| Provided To Others? | No |
| Impact | The method is still under development, but the global-scale functionality of AxiSEM3D has already been put to use is studies about mantle anisotropy and for monitoring elephant migration through seismic measurements: Tesoniero et al. (2019). "Finite-frequency sensitivity of SK(K)S phases to lowermost mantle anisotropy: Insights from global wavefield simulations with arbitrary anisotropy using AxiSEM3D." - AGU Poster Mortimer et al. (2018) "Classifying elephant behaviour through seismic vibrations." - Current Biology |