{"title":"基于卷积神经网络的各向异性介质弹性波模式分解","authors":"H. Huang, T. Wang, J. Cheng","doi":"10.3997/2214-4609.202112784","DOIUrl":null,"url":null,"abstract":"Seismic anisotropy is widely distributed in the subsurface of Earth. In an anisotropic medium, P and S waves are intrinsically coupled due to the nature of elastic wave propagation. For the elastic reverse time migration (ERTM), it is essential to isolate the P and S wave modes before applying the imaging condition in order to avoid the image crosstalks. However, the polarization direction of P or S waves in anisotropic media, which is crucial for the mode separation, is no longer parallel or perpendicular to the propagation direction and will be spatially varying with the change of model parameters. Therefore, the wave mode separation or vector decomposition of elastic wavefields becomes infeasible because of the expensive computational cost to calculate the polarization.","PeriodicalId":143998,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"45 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Elastic wave mode decomposition in anisotropic media with convolutional neural network\",\"authors\":\"H. Huang, T. Wang, J. Cheng\",\"doi\":\"10.3997/2214-4609.202112784\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Seismic anisotropy is widely distributed in the subsurface of Earth. In an anisotropic medium, P and S waves are intrinsically coupled due to the nature of elastic wave propagation. For the elastic reverse time migration (ERTM), it is essential to isolate the P and S wave modes before applying the imaging condition in order to avoid the image crosstalks. However, the polarization direction of P or S waves in anisotropic media, which is crucial for the mode separation, is no longer parallel or perpendicular to the propagation direction and will be spatially varying with the change of model parameters. Therefore, the wave mode separation or vector decomposition of elastic wavefields becomes infeasible because of the expensive computational cost to calculate the polarization.\",\"PeriodicalId\":143998,\"journal\":{\"name\":\"82nd EAGE Annual Conference & Exhibition\",\"volume\":\"45 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"82nd EAGE Annual Conference & Exhibition\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3997/2214-4609.202112784\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"82nd EAGE Annual Conference & Exhibition","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3997/2214-4609.202112784","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Elastic wave mode decomposition in anisotropic media with convolutional neural network
Seismic anisotropy is widely distributed in the subsurface of Earth. In an anisotropic medium, P and S waves are intrinsically coupled due to the nature of elastic wave propagation. For the elastic reverse time migration (ERTM), it is essential to isolate the P and S wave modes before applying the imaging condition in order to avoid the image crosstalks. However, the polarization direction of P or S waves in anisotropic media, which is crucial for the mode separation, is no longer parallel or perpendicular to the propagation direction and will be spatially varying with the change of model parameters. Therefore, the wave mode separation or vector decomposition of elastic wavefields becomes infeasible because of the expensive computational cost to calculate the polarization.