The University of Southampton
University of Southampton Institutional Repository

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

High-resolution resistivity imaging of marine gas hydrate structures by combined inversion of CSEM towed and ocean-bottom receiver data
High-resolution resistivity imaging of marine gas hydrate structures by combined inversion of CSEM towed and ocean-bottom receiver data
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. Two-dimensional 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 utilised to map and monitor seafloor mineralisation, freshwater reservoirs, CO2 sequestration sites and near-surface geothermal systems.
0956-540X
Attias, Eric
abf34bba-f99f-47f9-ba89-92df1c488a5e
Weitemeyer, Karen
22c524f6-b24d-4d2a-a46d-16b06c70a5d1
Hölz, Sebastian
45b0f075-86e6-4c17-bfb3-bb6c769e9e86
Naif, Samer
3c96a534-006e-42a1-91a0-ca9bb1e1351e
Minshull, Tim A.
bf413fb5-849e-4389-acd7-0cb0d644e6b8
Best, Angus I.
cad03726-10f8-4f90-a3ba-5031665234c9
Haroon, Amir
05a1f75d-ff5a-40cf-a6cf-c2c437e0058a
Jegen-Kulcsar, Marion
460c86a2-ec83-45cf-9eac-8178d3f0a17a
Berndt, Christian
d6db3f62-9891-4e8a-9210-b3aa6a8a4c22
Attias, Eric
abf34bba-f99f-47f9-ba89-92df1c488a5e
Weitemeyer, Karen
22c524f6-b24d-4d2a-a46d-16b06c70a5d1
Hölz, Sebastian
45b0f075-86e6-4c17-bfb3-bb6c769e9e86
Naif, Samer
3c96a534-006e-42a1-91a0-ca9bb1e1351e
Minshull, Tim A.
bf413fb5-849e-4389-acd7-0cb0d644e6b8
Best, Angus I.
cad03726-10f8-4f90-a3ba-5031665234c9
Haroon, Amir
05a1f75d-ff5a-40cf-a6cf-c2c437e0058a
Jegen-Kulcsar, Marion
460c86a2-ec83-45cf-9eac-8178d3f0a17a
Berndt, Christian
d6db3f62-9891-4e8a-9210-b3aa6a8a4c22

Attias, Eric, Weitemeyer, Karen, Hölz, Sebastian, Naif, Samer, Minshull, Tim A., Best, Angus I., Haroon, Amir, Jegen-Kulcsar, Marion and 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. (doi:10.1093/gji/ggy227).

Record type: Article

Abstract

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. Two-dimensional 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 utilised to map and monitor seafloor mineralisation, freshwater reservoirs, CO2 sequestration sites and near-surface geothermal systems.

Text
Attias et al. 2018 GJI - High-resolution resistivity imaging of marine gas hydrate structures by - Version of Record
Download (4MB)

More information

e-pub ahead of print date: 8 June 2018

Identifiers

Local EPrints ID: 421659
URI: https://eprints.soton.ac.uk/id/eprint/421659
ISSN: 0956-540X
PURE UUID: f3fd2478-5516-4b2f-a4ba-25cbd89d3aab
ORCID for Tim A. Minshull: ORCID iD orcid.org/0000-0002-8202-1379

Catalogue record

Date deposited: 19 Jun 2018 16:30
Last modified: 14 Mar 2019 01:48

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×