Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First Arrivals
This paper presents the results of the seismic refraction modeling using finite differences method (FDM), implemented in the program from the open source package Seismic Unix (SUFDMOD2), and its comparison with the modeling by time-term method (TTM) from the SEISIMAGER© software. The applied veloci...
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Perm Sate National Research University
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Online Access: | http://geology-vestnik.psu.ru/index.php/geology/article/view/209 |
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doaj-9307319aa6bc4c44bd539a86e20ec84c2020-11-24T20:45:49ZengPerm Sate National Research UniversityVestnik Permskogo Universiteta: Seriâ Geologiâ1994-36012313-47982017-09-0116325626310.17072/psu.geol.16.3.256168Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First ArrivalsY. P. Goyes0S. Khurama1G. Reina2G. Jimenez3Perm State University, 15 Bukireva Str., Perm 614990, RussiaSchool of Geology, Santander Industrial University, Cra 27 Calle 9 Ciudad Universitaria, Bucaramanga, Santander 680002 ColombiaSchool of Geology, Santander Industrial University, Cra 27 Calle 9 Ciudad Universitaria, Bucaramanga, Santander 680002 ColombiaResearch Group in Basic and Applied Geology (GIGBA), Santander Industrial University, Cra 27 Calle 9 Ciudad Universitaria, Bucaramanga, Santander 680002, ColombiaThis paper presents the results of the seismic refraction modeling using finite differences method (FDM), implemented in the program from the open source package Seismic Unix (SUFDMOD2), and its comparison with the modeling by time-term method (TTM) from the SEISIMAGER© software. The applied velocity model corresponds to the typical measurements situation in a seismic refraction survey. The depth of refraction interfaces varies approximately from 2 to 6 meters, thus allowing examining the propagation of head waves with the variable dip angles. The synthetic seismograms allow us identifying the first arrivals of head waves, which are subsequently the travel-time curves. The analysis of results obtained with FDM and TTM algorithms shows a high correlation with the refraction arrival times, but a low correlation with the arrival times of the direct wave. Finally, the obtained results allow concluding that the seismic modeling of the propagation of head waves using the method of finite differences makes it possible to accurately determine the first arrival time within the complex geological conditions and the velocity dispersion between the layers. The goal of this work is to show how these findings can be applied to seismic modeling by the method of finite differences for calculation of the first arrival time and clarify the results of measurements conducted in real conditions.http://geology-vestnik.psu.ru/index.php/geology/article/view/209seismic modelingseismic refractiontime-term inversionfinite differencestravel time curvefirst arrival timeSeismic Unix |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Y. P. Goyes S. Khurama G. Reina G. Jimenez |
spellingShingle |
Y. P. Goyes S. Khurama G. Reina G. Jimenez Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First Arrivals Vestnik Permskogo Universiteta: Seriâ Geologiâ seismic modeling seismic refraction time-term inversion finite differences travel time curve first arrival time Seismic Unix |
author_facet |
Y. P. Goyes S. Khurama G. Reina G. Jimenez |
author_sort |
Y. P. Goyes |
title |
Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First Arrivals |
title_short |
Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First Arrivals |
title_full |
Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First Arrivals |
title_fullStr |
Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First Arrivals |
title_full_unstemmed |
Seismic Refraction Modeling Using Finite Difference Method and its Implications in the Understanding of the First Arrivals |
title_sort |
seismic refraction modeling using finite difference method and its implications in the understanding of the first arrivals |
publisher |
Perm Sate National Research University |
series |
Vestnik Permskogo Universiteta: Seriâ Geologiâ |
issn |
1994-3601 2313-4798 |
publishDate |
2017-09-01 |
description |
This paper presents the results of the seismic refraction modeling using finite differences method (FDM), implemented in the program from the open source package Seismic Unix (SUFDMOD2), and its comparison with the modeling by time-term method (TTM) from the SEISIMAGER© software. The applied velocity model corresponds to the typical measurements situation in a seismic refraction survey. The depth of refraction interfaces varies approximately from 2 to 6 meters, thus allowing examining the propagation of head waves with the variable dip angles. The synthetic seismograms allow us identifying the first arrivals of head waves, which are subsequently the travel-time curves. The analysis of results obtained with FDM and TTM algorithms shows a high correlation with the refraction arrival times, but a low correlation with the arrival times of the direct wave. Finally, the obtained results allow concluding that the seismic modeling of the propagation of head waves using the method of finite differences makes it possible to accurately determine the first arrival time within the complex geological conditions and the velocity dispersion between the layers. The goal of this work is to show how these findings can be applied to seismic modeling by the method of finite differences for calculation of the first arrival time and clarify the results of measurements conducted in real conditions. |
topic |
seismic modeling seismic refraction time-term inversion finite differences travel time curve first arrival time Seismic Unix |
url |
http://geology-vestnik.psu.ru/index.php/geology/article/view/209 |
work_keys_str_mv |
AT ypgoyes seismicrefractionmodelingusingfinitedifferencemethodanditsimplicationsintheunderstandingofthefirstarrivals AT skhurama seismicrefractionmodelingusingfinitedifferencemethodanditsimplicationsintheunderstandingofthefirstarrivals AT greina seismicrefractionmodelingusingfinitedifferencemethodanditsimplicationsintheunderstandingofthefirstarrivals AT gjimenez seismicrefractionmodelingusingfinitedifferencemethodanditsimplicationsintheunderstandingofthefirstarrivals |
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1716813917352624128 |