Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010geoji.180..666m&link_type=abstract
Geophysical Journal International, Volume 180, Issue 5, pp. 666-684.
Astronomy and Astrophysics
Astronomy
2
Tomography, Gas And Hydrate Systems, Fracture And Flow, Seismic Attenuation
Scientific paper
A 3-D tomographic analysis of seismic velocity and attenuation fields is presented with the purpose to analyse the intimate relation of gas hydrates and free gas distribution with the fault pattern. The 3-D, four-component seismic data have been acquired offshore western Svalbard. The analysis of the subbottom topography of the base of the stability field of gas hydrates (indicated by the bottom simulating reflector) and the thickness of the underlying free gas bearing zone suggest a fault-induced compartmentalization of the gas reservoir. The proposed fluid and gas circulation scheme assumes deep sourced warm fluids moving upwards mainly along high permeability faults and fractures below the gas hydrate stability zone. Faults change from being a pathway of fluid flow to being barriers to fluid flow in the hydrate stability zone. Consequently, below the hydrate stability zone free gas is transferred from the permeable faults to non-faulted (but fault-bounded) sediments, where it accumulates below the base of the hydrate stability zone, producing a significantly thicker free gas layer. The tomographic approach is therefore proposed as an effective procedure to provide detailed information on 3-D P- and S-wave velocity and attenuation distribution in marine sediments and specifically to examine the details of the distribution of the gas hydrates and of the free gas, for which the dependence on the Vp, Vs and Qp is now fairly well known.
Camerlenghi Angelo
Madrussani Gianni
Rossi Giuliana
No associations
LandOfFree
Gas hydrates, free gas distribution and fault pattern on the west Svalbard continental margin does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gas hydrates, free gas distribution and fault pattern on the west Svalbard continental margin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas hydrates, free gas distribution and fault pattern on the west Svalbard continental margin will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1091310