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Title

High resolution seismic characterization of the shallow subsurface of the Loranca Basin (Spain): high resolution 3D

Other TitlesVICANAS 3D
AuthorsMarzán, Ignacio; Martí, David ; Torné, Montserrat ; Ruiz Fernández, Mario ; Carbonell, Ramón
KeywordsSeismic:Active:MCS-3D
DigitalSeg
SEGY
Seismic:Velocity
Seismometer_SingleFrequency
SeismicSource_Accelerated weight drop
Issue Date30-Jan-2014
PublisherDIGITAL.CSIC
CitationMarzán, Ignacio; Martí, David; Torné, Montserrat; Ruiz Fernández, Mario; Carbonell, Ramón. High resolution seismic characterization of the shallow subsurface of the Loranca Basin (Spain): high resolution 3D. 2014. DIGITAL.CSIC. http://dx.doi.org/10.20350/digitalCSIC/8636
AbstractA high-resolution seismic tomography survey was acquired to obtain a full 3-D P-wave seismic velocity image of the Záncara river basin (eastern Spain). The study area consists of lutites and gypsum from a Neogene sedimentary sequence. The project also targeted the geometry of the underground structure with emphasis on defining the lithological contacts but also the presence of cavities and faults or fractures. An extensive drilling campaign provided uniquely tight constraints on the lithology; these included core samples and wireline geophysical measurements. The analysis of the well log data enabled the accurate definition of the lithological boundaries and provided an estimate of the seismic velocity ranges associated with each lithology. The final joint interpreted image reveals a wedge-shaped structure consisting of four different lithological units. The study features the necessary key elements to test the travel time tomographic inversion approach for the high-resolution characterization of the shallow surface. In this methodological validation test, travel-time tomography demonstrated to be a powerful tool with a relatively high capacity for imaging in detail the lithological contrasts of evaporitic sequences located at very shallow depths, when integrated with additional geological and geophysical data.
DescriptionThe data acquisition contract was awarded to ENRESA and took place in January 2014. Seismic data was successfully collected in the Záncara river basin (Cuenca, Spain). This is a high-resolution seismic tomography survey to obtain a full 3-D P-wave seismic velocity image of the studied area. A regular and dense grid of 676 shots and 1200 receivers was used to image a 500 m x 500 m area of the shallow surface. A 240-channel system and a seismic source, consisting of an accelerated weight drop, were used in the acquisition. Half a million travel-time picks were inverted to provide the 3-D seismic velocity distribution up to 120 m depth. The 3-D survey was acquired in five swaths, each one consisting on five receiver lines, resulting in a total of 3380 shot gathers. Technical specifications of the profiles: Receiver number: 240, Receiver interval: 2 m, Source accelerated weightdrop: 250 kg, Source interval: 6 m, Sample rate: 1 ms, Record time: 4 s.
In this repository, in addition to the seismic 3DSurvey, a resistivity model (VICANAS_3D_Res_UTM30), a lithological model (VICANAS_3D_Vp_Res_Lito_UTM30), and a training set (VICANAS_Training_set) are available. In order to improve the geological interpretation of the seismic tomography, we integrated it with the resistivity model to build a 3D lithological model. To this aim, we created a new bi-parameter grid with Vp and Res values at each node. Then, we lithologically classified the nodes using supervised learning according to a training set extracted from the wells.
URIhttp://hdl.handle.net/10261/179856
DOIhttp://dx.doi.org/10.20350/digitalCSIC/8636
ReferencesMartí, D.; Marzán, I.; Sachsenhausen, J.; Ruiz, M.; Torné, M.; Mendes, M.; Carbonell, R. (2019) 3-D seismic travel-time tomography validation of a detailed subsurface model: the case study of the Záncara River (Cuenca, Spain). Solid Earth, 10, 177-192. https://doi.org/10.5194/se-10-177-2019
Marzán, I., Martí, D., Álvarez-Marrón, J., Lobo, A., Ruiz, M., Torné, M., and Carbonell, R. (2018). Detailed 3D subsurface geophysical model: data integration, multi-parameter inversion and statistical integrated interpretation: the case study of the Zancata River Basin (Cuenca, Spain). International Symposium on Deep Earth Exploration and Practices, Beijing, China. Acta Geologica Sinica Vol. 92, Supp. 1. https://doi.org/10.1111/1755-6724.14099
Carbonell, R., Marzán, I., Martí, D., Lobo, A., Jean, K., and Álvarez-Marrón, J. (2016). Detailed 3D geophysical model of the shallow surface (Záncara River Basin, Iberian Peninsula). American Geoscience Union, Fall Meeting, NS33B-1974. http://adsabs.harvard.edu/abs/2016AGUFMNS33B1974C
Martí, D., Marzán, I., Kormann, J., Álvarez-Marrón, J., and Carbonell, R., (2016). Shallow subsurface 3-D seismic velocity structure (Záncara river basin, Iberian Peninsula). 17th International Seismix (International Symposium on Deep Seismic Profiling of the Continents and their Margins) Symposium: 104. Scotland, United Kingdom. https://digital.csic.es/handle/10261/150411
Marzán, I., Martí, D., Lobo, A., Kormann, J., Álvarez-Marrón, J., and Carbonell, R., (2016). Geophysical data integration for a joint interpretation in a shallow gypsiferous context. 17th International Seismix (International Symposium on Deep Seismic Profiling of the Continents and their Margins) Symposium: 107. Scotland, United Kingdom. http://digital.csic.es/handle/10261/149970
Marzán, I., Martí, D., Lobo, A., Kormann, J., Álvarez-Marrón, J., and Carbonell, R., (2016). Interpretación conjunta de modelos de velocidad y resistividad 3D mediante clasificación estadística. Geotemas 16 (1): 507-510. ISSN 1576-5172. Sociedad Geológica de España, IX Congreso Geológico de España, Huelva. http://digital.csic.es/handle/10261/147678
Martí, D., Marzán, I., Álvarez-Marrón, J., and Carbonell, R. (2016). Testing & Validating: 3D seismic travel time tomography (detailed shallow subsurface imaging). Geophysical Research Abstracts Vol. 18: EGU2016-7836-1. https://digital.csic.es/handle/10261/150368
Marzán, I., Martí, D., Lobo, A., Álvarez-Marrón, J. and Carbonell, R. (2016). Seismics-electrics Joint Interpretation in a gypsiferous context. Geophysical Research Abstracts Vol. 18: EGU2016-8062-1. https://digital.csic.es/handle/10261/150482
Kormann, J.A., Martí, D., Rodríguez, J. E., Marzán, I., Gutiérrez, N., Ferrer, M., Hanzich, M., de la Puente, J., Carbonell, R., Cela, J. M. and Fernández, S. (2016). 3D elastic full waveform inversion - on land study case. 78th European Association of Geoscientists & Engineers (EAGE) Conference and Exhibition 2016, Tu SRS2 08. Viena, Austria. doi: 10.3997/2214-4609.201600831. http://hdl.handle.net/2117/87763. https://doi.org/10.3997/2214-4609.201600831
Martí, D., Marzán, I., Sachsenhausen, J., Álvarez-Marrón, J., Cienfuegos, I., and Carbonell, R. (2015). High-resolution Seismic Characterization of the Shallow Subsurface Applied to Civil Engineering . 77th European Association of Geoscientists & Engineers (EAGE) Conference and Exhibition 2015, WS03-B01. Madrid. https://doi.org/10.3997/2214-4609.201413471. http://www.earthdoc.org/publication/publicationdetails/?publication=81311
Sendin Manchado, S. (2015). Integrated 3D geophysical study of the shallow subsurface of the Zancara River Basin (Cuenca, Spain). Master Thesis, ICTJA-CSIC. http://digital.csic.es/handle/10261/140131
Carbonell, R., Martí, D., Marzán, I., and Álvarez-Marrón, J. (2015). Seismic tomography: exploring the shallow surface (case history studies). Invited Talk, Department of Geology, Kyungpook National University, Daegu, Korea.
Sachsenhausen, J., Martí, D., Marzán, I., Cienfuegos, I., Álvarez-Marrón, J., Carbonell, R., and Pérez-Estaún, A. (2014). High-resolution 3D velocity model from seismic tomography in the Záncara river basin (Cuenca, Iberian Peninsula). 16th Edition of the Deep SEISMIX International Symposium on Multi-scale Seismic Imaging of the Earth's crust and Upper Mantle. Castelldefels, Barcelona. https://doi.org/10.13140/2.1.4828.1923.
Sachsenhausen, J. (2014). Determination of 3D velocity model through seismic tomography in the Záncara River Basin (Cuenca, Iberian Peninsula). Master Thesis.
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