دورية أكاديمية
Downward continuation of marine seismic reflection data: an undervalued tool to improve velocity models
| العنوان: | Downward continuation of marine seismic reflection data: an undervalued tool to improve velocity models |
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| المؤلفون: | Jiménez-Tejero, C.E., Ranero, César R., Sallarès, Valentí, Gras Andreu, Claudia |
| المساهمون: | Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España) |
| بيانات النشر: | Royal Astronomical Society |
| سنة النشر: | 2022 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | Numerical modelling, Acoustic properties, Controlled source seismology, Wave propagation |
| الوصف: | This is a contribution of the Barcelona Center for Subsurface Imaging.-- 18 pages, 13 figures, 3 tables, 2 appendixes, supplementary data https://doi.org/10.1093/gji/ggac087Test.-- Data availability: The DC code is available online at GitHub repository: https://github.com/ejimeneztejero/DCTest, under the GNU general public license v3.0 ; The purpose of marine seismic experiments is to provide information of the structure and physical properties of the subsurface. The P-wave velocity distribution is the most commonly modelled property, usually by inversion of arrival times or waveform attributes. In wide-angle seismic reflection/refraction (WAS) experiments, arrival times of seismic phases identified in data recorded by ocean bottom seismometers (OBS) are used to image relatively deep structures. Most WAS experiments have relatively low redundancy and produce robust velocity models of limited resolution. The shallow subsurface is also commonly studied with multichannel seismic (MCS) data recorded by towed streamers, a technique that is highly complementary to WAS. In this case, the recording of refractions as first arrivals is limited primarily by the streamer length and by features like water depth and the velocity structure and, in general, most refractions are masked by reflections and noise. However, MCS data of variable quality are available in many regions where no other data exist and previous work has shown that these data can also be used to retrieve velocity models through traveltime and full waveform inversion provided that first arrival information is properly extracted from the record sections. The most widely used tool to extract refractions as first arrivals from MCS recordings is the so-called downward continuation technique, which is designed for redatuming streamer field data to the seafloor. In this new virtual configuration, the early refractions transform to seismic phases that are becoming visible as first arrivals from nearly zero offset, facilitating their identification and use in traveltime ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0956-540X 1365-246X |
| العلاقة: | #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/MINECO//CTM2015-71766-R/ES/FORMACION DE LOS DOMINIOS GEOLOGICOS EN EL MARGEN OESTE DE IBERIA Y LA REACTIVACION DE SUS LIMITES TECTONICOS/; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109559RB-I00/ES/ESTUDIO TOMOGRAFICO TRIDIMENSIONAL DE LA LITOSFERA ATLANTICO-NORTEAFRICANA/; Publisher's version; https://doi.org/10.1093/gji/ggac087Test; Sí; Geophysical Journal International 230(2): 831-848 (2022); CEX2019-000928-S; http://hdl.handle.net/10261/280313Test; http://dx.doi.org/10.13039/501100011033Test; http://dx.doi.org/10.13039/501100003329Test |
| DOI: | 10.1093/gji/ggac087 |
| DOI: | 10.13039/501100011033 |
| DOI: | 10.13039/501100003329 |
| الإتاحة: | https://doi.org/10.1093/gji/ggac087Test https://doi.org/10.13039/501100011033Test https://doi.org/10.13039/501100003329Test http://hdl.handle.net/10261/280313Test |
| حقوق: | open |
| رقم الانضمام: | edsbas.2C9488B6 |
| قاعدة البيانات: | BASE |
| تدمد: | 0956540X 1365246X |
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| DOI: | 10.1093/gji/ggac087 |