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Estimating pore-space gas hydrate saturations from well log acoustic data

Geochemistry, Geophysics, Geosystems

By:
and
DOI: 10.1029/2008GC002081

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Abstract

Relating pore-space gas hydrate saturation to sonic velocity data is important for remotely estimating gas hydrate concentration in sediment. In the present study, sonic velocities of gas hydrate–bearing sands are modeled using a three-phase Biot-type theory in which sand, gas hydrate, and pore fluid form three homogeneous, interwoven frameworks. This theory is developed using well log compressional and shear wave velocity data from the Mallik 5L-38 permafrost gas hydrate research well in Canada and applied to well log data from hydrate-bearing sands in the Alaskan permafrost, Gulf of Mexico, and northern Cascadia margin. Velocity-based gas hydrate saturation estimates are in good agreement with Nuclear Magneto Resonance and resistivity log estimates over the complete range of observed gas hydrate saturations.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Estimating pore-space gas hydrate saturations from well log acoustic data
Series title:
Geochemistry, Geophysics, Geosystems
DOI:
10.1029/2008GC002081
Volume
9
Issue:
7
Year Published:
2008
Language:
English
Publisher:
Wiley
Contributing office(s):
Central Energy Resources Science Center
Description:
Q07008
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geochemistry, Geophysics, Geosystems