Gas hydrate and free gas concentrations in two sites inside the Chilean margin (Itata and Valdivia offshores)

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dc.contributor.authorVargas-Cordero, I.
dc.contributor.authorTinivella, U.
dc.contributor.authorVillar-Muñoz, L.
dc.date.accessioned2018-08-21T15:01:31Z
dc.date.available2018-08-21T15:01:31Z
dc.date.issued2017
dc.descriptionIndexación: Scopus.es_ES
dc.description.abstractTwo sectors, Itata and Valdivia, which are located in the Chilean margin were analysed by using seismic data with the main purpose to characterize the gas hydrate concentration. Strong lateral velocity variations are recognised, showing a maximum value in Valdivia offshore (2380 ms-1 above the BSR) and a minimum value in the Itata offshore (1380 m·s-1 below the BSR). In both of the sectors, the maximum hydrate concentration reaches 17% of total volume, while the maximum free gas concentration is located Valdivia offshore (0.6% of total volume) in correspondence of an uplift sector. In the Itata offshore, the geothermal gradient that is estimated is variable and ranges from 32 °C·km-1 to 87 °C·km-1, while in Valdivia offshore it is uniform and about 35 °C·km-1. When considering both sites, the highest hydrate concentration is located in the accretionary prism (Valdivia offshore) and highest free gas concentration is distributed upwards, which may be considered as a natural pathway for lateral fluid migration. The results that are presented here contribute to the global knowledge of the relationship between hydrate/free gas presence and tectonic features, such as faults and folds, and furnishes a piece of the regional hydrate potentiality Chile offshore.es_ES
dc.description.urihttp://www.mdpi.com/1996-1073/10/12/2154
dc.identifier.citationEnergies, 10(12), art. no. 2154.es_ES
dc.identifier.issn1996-1073
dc.identifier.otherDOI: 10.3390/en10122154
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/6725
dc.language.isoenes_ES
dc.publisherMDPI AGes_ES
dc.subjectBSRes_ES
dc.subjectChilean margines_ES
dc.subjectGas hydratees_ES
dc.subjectGas-phase concentrationes_ES
dc.subjectPre-stack depth migrationes_ES
dc.subjectSeismic velocityes_ES
dc.titleGas hydrate and free gas concentrations in two sites inside the Chilean margin (Itata and Valdivia offshores)es_ES
dc.typeArtículoes_ES
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