High-resolution resistivity imaging of marine gas hydrate structures by combined inversion of CSEM towed and ocean-bottom receiver data

Attias, Eric; Weitemeyer, Karen; Hölz, Sebastian; Naif, Samer; Minshull, Tim A; Best, Angus I ORCID: https://orcid.org/0000-0001-9558-4261; Haroon, Amir; Jegen-Kulcsar, Marion; Berndt, Christian. 2018 High-resolution resistivity imaging of marine gas hydrate structures by combined inversion of CSEM towed and ocean-bottom receiver data. Geophysical Journal International, 214 (3). 1701-1714. 10.1093/gji/ggy227

Before downloading, please read NORA policies.

Preview	Text Attias_et_al_revised_manuscript_GJI_S_17_0820.R2.pdf Download (8MB) | Preview
	Text 214/3/1701/5034952_redirectedFrom=fulltext Download (179kB)
Preview	Text Attias et al. 2018 GJI - High-resolution resistivity imaging of marine gas hydrate structures by.pdf Download (4MB) | Preview

Abstract/Summary

We present high-resolution resistivity imaging of gas hydrate pipe-like structures, as derived from marine controlled-source electromagnetic (CSEM) inversions that combine towed and ocean-bottom electric field receiver data, acquired from the Nyegga region, offshore Norway. 2.5-D CSEM inversions applied to the towed receiver data detected four new prominent vertical resistive features that are likely gas hydrate structures, located in proximity to a major gas hydrate pipe-like structure, known as the CNE03 pockmark. The resistivity model resulting from the CSEM data inversion resolved the CNE03 hydrate structure in high resolution, as inferred by comparison to seismically constrained inversions. Our results indicate that shallow gas hydrate vertical features can be delineated effectively by inverting both ocean-bottom and towed receiver CSEM data simultaneously. The approach applied here can be utilized to map and monitor seafloor mineralization, freshwater reservoirs, CO2 sequestration sites and near-surface geothermal systems.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1093/gji/ggy227
ISSN:	0956-540X
Date made live:	10 Jul 2018 09:09 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/520497

Actions (login required)

View Item

Document Downloads

More statistics for this item...