Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equation
With the deepening of oil and gas exploration and the increasing complexity of exploration targets, the influence of anisotropy and anelasticity of subsurface media on seismic imaging cannot be ignored. The least-squares reverse time migration is developed on the idea of linear inversion, which can...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-09-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.998986/full |
| _version_ | 1811180998604357632 |
|---|---|
| author | Shanshan Zhang Bingluo Gu Zhenchun Li |
| author_facet | Shanshan Zhang Bingluo Gu Zhenchun Li |
| author_sort | Shanshan Zhang |
| collection | DOAJ |
| description | With the deepening of oil and gas exploration and the increasing complexity of exploration targets, the influence of anisotropy and anelasticity of subsurface media on seismic imaging cannot be ignored. The least-squares reverse time migration is developed on the idea of linear inversion, which can effectively solve the amplitude imbalance, low resolution, and serious imaging noise problems of RTM. In this paper, based on the viscoacoustic pure qP-wave equation, the corresponding demigration operator, adjoint operator, and gradient-sensitive kernel are derived, and the least-square reverse time migration imaging algorithm of viscoacoustic pure qP-wave in VTI medium is proposed. During iterative inversion, the inverse of Hessian is approximately solved to achieve stable attenuation compensation. Finally, we verify the effectiveness and applicability of the proposed viscoacoustic VTI least-squares reverse time migration imaging algorithm through the model tests and field data. The numerical results show that the method can compensate for the amplitude loss and phase distortion caused by attenuation, and correct the anisotropy-induced misalignment of the reflection interfaces, which improves the accuracy and resolution of the imaging profile. |
| first_indexed | 2024-04-11T09:10:56Z |
| format | Article |
| id | doaj.art-e4acdcc3e03b4165a164a740d500de04 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-11T09:10:56Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-e4acdcc3e03b4165a164a740d500de042022-12-22T04:32:30ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-09-011010.3389/feart.2022.998986998986Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equationShanshan ZhangBingluo GuZhenchun LiWith the deepening of oil and gas exploration and the increasing complexity of exploration targets, the influence of anisotropy and anelasticity of subsurface media on seismic imaging cannot be ignored. The least-squares reverse time migration is developed on the idea of linear inversion, which can effectively solve the amplitude imbalance, low resolution, and serious imaging noise problems of RTM. In this paper, based on the viscoacoustic pure qP-wave equation, the corresponding demigration operator, adjoint operator, and gradient-sensitive kernel are derived, and the least-square reverse time migration imaging algorithm of viscoacoustic pure qP-wave in VTI medium is proposed. During iterative inversion, the inverse of Hessian is approximately solved to achieve stable attenuation compensation. Finally, we verify the effectiveness and applicability of the proposed viscoacoustic VTI least-squares reverse time migration imaging algorithm through the model tests and field data. The numerical results show that the method can compensate for the amplitude loss and phase distortion caused by attenuation, and correct the anisotropy-induced misalignment of the reflection interfaces, which improves the accuracy and resolution of the imaging profile.https://www.frontiersin.org/articles/10.3389/feart.2022.998986/fullVTI mediaattenuation and compensationnearly constant Q modelpure qP-waveLSRTM |
| spellingShingle | Shanshan Zhang Bingluo Gu Zhenchun Li Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equation Frontiers in Earth Science VTI media attenuation and compensation nearly constant Q model pure qP-wave LSRTM |
| title | Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equation |
| title_full | Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equation |
| title_fullStr | Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equation |
| title_full_unstemmed | Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equation |
| title_short | Least-squares reverse time migration based on the viscoacoustic VTI pure qP-wave equation |
| title_sort | least squares reverse time migration based on the viscoacoustic vti pure qp wave equation |
| topic | VTI media attenuation and compensation nearly constant Q model pure qP-wave LSRTM |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.998986/full |
| work_keys_str_mv | AT shanshanzhang leastsquaresreversetimemigrationbasedontheviscoacousticvtipureqpwaveequation AT bingluogu leastsquaresreversetimemigrationbasedontheviscoacousticvtipureqpwaveequation AT zhenchunli leastsquaresreversetimemigrationbasedontheviscoacousticvtipureqpwaveequation |