Improving the Resolution of Deep-Crustal Seismic Data to Study Shallow Gas Hydrates on the Hikurangi Margin, New Zealand

Hai Zhu; Ingo A. Pecher; Stuart A. Henrys; Guy Maslen

doi:10.1071/ASEG2004ab166

ISSN: 2202-0586
E-ISSN:

oa Improving the Resolution of Deep-Crustal Seismic Data to Study Shallow Gas Hydrates on the Hikurangi Margin, New Zealand
Authors Hai Zhu^a, Ingo A. Pecher^b, Stuart A. Henrys^c and Guy Maslen^d
View Affiliations Hide Affiliations

^a GNS, , New Zealand, [email protected] ^b GNS, , New Zealand, [email protected] ^c GNS, , New Zealand, [email protected] ^d GNS, , New Zealand, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2004, Issue ASEG2004 - 17th Geophysical Conference, Dec 2004, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2004ab166
- Published online: 01 Dec 2004

Abstract

Methane gas hydrate, an ice-like form of water and methane, is abundant on continental margins worldwide and may constitute a future energy source. The Hikurangi margin offshore of New Zealand is predicted to contain vast quantities of gas hydrate. Much of our knowledge on Hikurangi margin gas hydrates stems from crustal seismic data which are of limited use for gas hydrate reconnaissance because of relatively low resolution. We here present results from reprocessing of a crustal seismic line with a focus on maximising resolution. We benchmarked our results to a higher-resolution survey that was recently acquired along this line. While the reprocessed crustal data are not ideal for gas hydrate investigations, we are able to identify most major features relevant to gas hydrate occurrence, in particular bottom simulating reflections, free gas close to the seafloor, and normal faults that intersect the seafloor. Our results demonstrate that reprocessing of crustal seismic data for maximum resolution may lead to significant improvements for studying gas hydrates.

Article metrics loading...

/content/journals/10.1071/ASEG2004ab166

2004-12-01

2026-01-18

From This Site

/content/journals/10.1071/ASEG2004ab166

dcterms_title,dcterms_subject,pub_keyword

-contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution

10

5

Full text loading...

References

Gorman, A.R., Holbrook, W.S., Hornbach, M.J., Hackwith, K.L., Lizarralde, D., and Pecher , I., 2002, Mgration of methane gas through the hydrate stability zone in a low-flux hydrate province: Geology 30, 327-330.
Henrys, S.A., 2003, NBP03-04D (9-14 October) sea-trial seismic report: Institute of Geological and Nuclear Sciences, Client Report, 2003/126, 16.
Henrys, S.A., Stern, T., White, R., and NIGHT Working Group, 2003, Exploring the plate boundary structure of the North Island of New Zealand: Eos Trans. Am. Geophys. Union 84, 294-295.
Holbrook, W.S., Gorman, A.R., Hornbach, M., Hackwith, K.L., Nealon, I, Lizarralde, D., and Pecher, I.A., 2002, Seismic detection of marine methane hydrate: The Leading Egde 21, 686-689.
Max, M.D. (ed.), 2000, Natural Gas Hydrate in Oceanic and Permafrost Environments: Kluwer Academic Publishers.
Pecher, LA., and Henrys, S.A., 2003, Potential gas reserves in gas hydrate sweet spots on the Hikurangi Margin, New Zealand: Institute of Geological and Nuclear Sciences, Science Report, 2003/23, 32.
Pecher, LA., Henrys, S.A., and Zhu, H., in press, Seismic images of gas conduits beneath vents and gas hydrates on Ritchie Ridge, Hikurangi margin, New Zealand: N. Z. J. Geol. Geophys.
Vanneste, M., De Batist, M., Golmshtok, A., Kremlev, A., and Versteeg, W., 2001, Multi-frequency seismic study of gas hydrate-bearing sediments in Lake Baikal, Siberia: Mar. Geol. 172, 1-21.
Wood, W.T., Gettrust, J.F., Chapman, N.R., Spence, G.D., and Hyndman, R.D., 2002, Decreased stability of methane hydrates in marine sediments owing to phase-boundary roughness: Nature 420, 656-660.

/content/journals/10.1071/ASEG2004ab166

Article Type: Research Article

Keyword(s): Gas hydrates; seismic processing

Most Cited This Month Most Cited RSS feed

- Inversion of data from electrical imaging surveys in water-covered areas
  
  Authors M. H. Loke and J. W. Lane
- Inversion of Magnetic Data from Remanent and Induced Sources
  
  Authors Robert G. Elllis, Barrry de Wet and Ian N. Macleod
- A comparison of smooth and blocky inversion methods in 2-D electrical imaging surveys
  
  Authors M. H. Loke, Ian Acworth and Torleif Dahlin
- Designing matched bandpass and azimuthal filters for the separation of potential-field anomalies by source region and source type
  
  Authors Jeffrey D. Phillips
- Bad Colour Maps Hide Big Features and Create False Anomalies
  
  Authors Peter Kovesi
- Practical 3D EM inversion – the P223F software suite
  
  Authors Art Raiche, Fred Sugeng and Glenn Wilson
- Estimating Noise Levels in AEM Data
  
  Authors Andy Green and Richard Lane
- Target delineation using Full Tensor Gravity Gradiometry data
  
  Authors Colm A. Murphy and James Brewster
- Transdimensional Monte Carlo Inversion of AEM Data
  
  Authors Ross C Brodie and Malcolm Sambridge
- The geotech VTEM time domain helicopter em system
  
  Authors Ken Witherly, Richard Irvine and Edward Morrison
More Less

oa Improving the Resolution of Deep-Crustal Seismic Data to Study Shallow Gas Hydrates on the Hikurangi Margin, New Zealand

Abstract

Most Read This Month

Most Cited This Month Most Cited RSS feed