{"title":"VTI介质反射率稀疏约束联合偏移反演","authors":"Yifei Chen, Deli Wang, Bin Hu, Shiqi Lv","doi":"10.1016/j.jappgeo.2025.105927","DOIUrl":null,"url":null,"abstract":"<div><div>Traditional joint migration inversion (JMI) algorithm for anisotropic media, rooted in one-way wave equation, simulate wave propagation in VTI media. VTI-JMI performs reflectivity migration and velocity models inversion by minimizing the mismatch between observed and modelled data. This paper integrates a reflectivity-constrained velocity estimation algorithm into the VTI-JMI framework to mitigate the impact of parameter trade-offs and noise accumulation in VTI-JMI. The proposed approach constructs a regularization constraint term by utilizing residual between iterative reflectivity and reflectivity approximated from the estimated velocity to refine velocity updates. Moreover, it incorporates the Non-subsampled Shearlet transform (NSST) to achieve multiscale sparse denoising of reflectivity image, for enhancing constraint quality. The constraint does not require large extra computational costs and accurate initial models. Compared to traditional VTI-JMI, the proposed method significantly reduces noise in reflectivity image, while achieving higher precision in velocity models with sharper reflectors. Numerical experiments demonstrate the validity of our proposed algorithm.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"242 ","pages":"Article 105927"},"PeriodicalIF":2.1000,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Reflectivity sparsity-constrained joint migration inversion for VTI media\",\"authors\":\"Yifei Chen, Deli Wang, Bin Hu, Shiqi Lv\",\"doi\":\"10.1016/j.jappgeo.2025.105927\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Traditional joint migration inversion (JMI) algorithm for anisotropic media, rooted in one-way wave equation, simulate wave propagation in VTI media. VTI-JMI performs reflectivity migration and velocity models inversion by minimizing the mismatch between observed and modelled data. This paper integrates a reflectivity-constrained velocity estimation algorithm into the VTI-JMI framework to mitigate the impact of parameter trade-offs and noise accumulation in VTI-JMI. The proposed approach constructs a regularization constraint term by utilizing residual between iterative reflectivity and reflectivity approximated from the estimated velocity to refine velocity updates. Moreover, it incorporates the Non-subsampled Shearlet transform (NSST) to achieve multiscale sparse denoising of reflectivity image, for enhancing constraint quality. The constraint does not require large extra computational costs and accurate initial models. Compared to traditional VTI-JMI, the proposed method significantly reduces noise in reflectivity image, while achieving higher precision in velocity models with sharper reflectors. Numerical experiments demonstrate the validity of our proposed algorithm.</div></div>\",\"PeriodicalId\":54882,\"journal\":{\"name\":\"Journal of Applied Geophysics\",\"volume\":\"242 \",\"pages\":\"Article 105927\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2025-09-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Applied Geophysics\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0926985125003088\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Applied Geophysics","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0926985125003088","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Reflectivity sparsity-constrained joint migration inversion for VTI media
Traditional joint migration inversion (JMI) algorithm for anisotropic media, rooted in one-way wave equation, simulate wave propagation in VTI media. VTI-JMI performs reflectivity migration and velocity models inversion by minimizing the mismatch between observed and modelled data. This paper integrates a reflectivity-constrained velocity estimation algorithm into the VTI-JMI framework to mitigate the impact of parameter trade-offs and noise accumulation in VTI-JMI. The proposed approach constructs a regularization constraint term by utilizing residual between iterative reflectivity and reflectivity approximated from the estimated velocity to refine velocity updates. Moreover, it incorporates the Non-subsampled Shearlet transform (NSST) to achieve multiscale sparse denoising of reflectivity image, for enhancing constraint quality. The constraint does not require large extra computational costs and accurate initial models. Compared to traditional VTI-JMI, the proposed method significantly reduces noise in reflectivity image, while achieving higher precision in velocity models with sharper reflectors. Numerical experiments demonstrate the validity of our proposed algorithm.
期刊介绍:
The Journal of Applied Geophysics with its key objective of responding to pertinent and timely needs, places particular emphasis on methodological developments and innovative applications of geophysical techniques for addressing environmental, engineering, and hydrological problems. Related topical research in exploration geophysics and in soil and rock physics is also covered by the Journal of Applied Geophysics.