Pub Date : 2018-08-27DOI: 10.1190/SEGAM2018-2997751.1
I. Karpov, B. Arntsen, E. Raknes
We propose a way to include small-scale inhomogeneities and sharp boundaries in high-order acoustic finite di erence schemes. The method is based on representing the inhomogeneities as secondary sources defined on dense auxiliary grids. Interaction of the secondary sources with the finite di erence scheme is performed by interpolation. We observe good agreement of the method’s results with precise solutions for simple models in 2D.
{"title":"Using interpolation to insert small-scale inhomogeneities in the acoustic finite-difference scheme","authors":"I. Karpov, B. Arntsen, E. Raknes","doi":"10.1190/SEGAM2018-2997751.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2997751.1","url":null,"abstract":"We propose a way to include small-scale inhomogeneities and sharp boundaries in high-order acoustic finite di erence schemes. The method is based on representing the inhomogeneities as secondary sources defined on dense auxiliary grids. Interaction of the secondary sources with the finite di erence scheme is performed by interpolation. We observe good agreement of the method’s results with precise solutions for simple models in 2D.","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124530739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-27DOI: 10.1190/SEGAM2018-2997202.1
Xukai Shen, Li Jiang, J. Dellinger, A. Brenders, Chandan Kumar, M. James, J. Etgen, David P. Meaux, R. Walters, N. Abdullayev
{"title":"High-resolution full-waveform inversion for structural imaging in exploration","authors":"Xukai Shen, Li Jiang, J. Dellinger, A. Brenders, Chandan Kumar, M. James, J. Etgen, David P. Meaux, R. Walters, N. Abdullayev","doi":"10.1190/SEGAM2018-2997202.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2997202.1","url":null,"abstract":"","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127610217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-27DOI: 10.1190/SEGAM2018-2993286.1
Xu Liu, S. Greenhalgh
{"title":"Numerical modeling of poro-viscoelastic wave propagation in effective Biot media using a mixed grid finite-difference frequency-space domain approach","authors":"Xu Liu, S. Greenhalgh","doi":"10.1190/SEGAM2018-2993286.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2993286.1","url":null,"abstract":"","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127749845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-27DOI: 10.1190/SEGAM2018-2996341.1
Junxiao Li, K. Innanen, G. Tao
The second order velocity-displacement SH-wave equation in VTI media is reduced to first order equations. During SH-wave simulation, the spatial derivatives of the new developed first order SH-wave equations are transformed into wavenumber domain and a staggeredgrid Fourier pseudospectral time-domain method is used to obtain discretized forms of these wavenumber operators, which in turn, effectively eliminates the Gibbs phenomenon. The first order velocitydisplacement SH-wave equations also make it possible to set hybrid perfectly matched layers around computational boundaries to mitigate artificial reflections. This new scheme is applied for wavefield modeling in two-layer heterogeneous media. Comparisons of simulation results with pseudo-spectral method using second-order SH-wave equation further verify its accuracy. Finally, SH wavefield simulation in a three-dimensional over-thrust model is illustrated.
{"title":"A 3D pseudospectral method for SH-wave simulation in heterogeneous media","authors":"Junxiao Li, K. Innanen, G. Tao","doi":"10.1190/SEGAM2018-2996341.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2996341.1","url":null,"abstract":"The second order velocity-displacement SH-wave equation in VTI media is reduced to first order equations. During SH-wave simulation, the spatial derivatives of the new developed first order SH-wave equations are transformed into wavenumber domain and a staggeredgrid Fourier pseudospectral time-domain method is used to obtain discretized forms of these wavenumber operators, which in turn, effectively eliminates the Gibbs phenomenon. The first order velocitydisplacement SH-wave equations also make it possible to set hybrid perfectly matched layers around computational boundaries to mitigate artificial reflections. This new scheme is applied for wavefield modeling in two-layer heterogeneous media. Comparisons of simulation results with pseudo-spectral method using second-order SH-wave equation further verify its accuracy. Finally, SH wavefield simulation in a three-dimensional over-thrust model is illustrated.","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128130160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-27DOI: 10.1190/SEGAM2018-2995740.1
H. Bedle, W. Vinson
{"title":"Rock modeling and seismic attribute identification of the gas-hydrate stability zone in New Zealand","authors":"H. Bedle, W. Vinson","doi":"10.1190/SEGAM2018-2995740.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2995740.1","url":null,"abstract":"","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125722315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-27DOI: 10.1190/SEGAM2018-2959509.1
Z. Kang, S. Ke, C. Yin, J. Jia, Mingyu Li, Junjian Li, D. Zou, Y. Cai, Xuerui Ma
{"title":"Introduction of the coil-type complex resistivity spectrum logging method","authors":"Z. Kang, S. Ke, C. Yin, J. Jia, Mingyu Li, Junjian Li, D. Zou, Y. Cai, Xuerui Ma","doi":"10.1190/SEGAM2018-2959509.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2959509.1","url":null,"abstract":"","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121860226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-27DOI: 10.1190/SEGAM2018-2996032.1
R. Penna, S. Araújo, R. Sansonowski, Leonardo Costa de Oliveira, J. Rosseto, A. Geisslinger, M. Matos
{"title":"Igneous rock characterization through reprocessing, FWI imaging, and elastic inversion of a legacy seismic dataset in Brazilian Pre-Salt Province","authors":"R. Penna, S. Araújo, R. Sansonowski, Leonardo Costa de Oliveira, J. Rosseto, A. Geisslinger, M. Matos","doi":"10.1190/SEGAM2018-2996032.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2996032.1","url":null,"abstract":"","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121965021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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