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Methane hydrate rock physics models for the Blake Outer Ridge
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In this article, the effect of different hydrate models on elastic moduli and velocities of hydrate-bearing sediments was explored. But the results of the experiments were limited to the Blake Outer Ridge.Abstract:
Seismic analyses of methane hydrate data from the Blake Outer Ridge indicate high Pwave velocity and anomalously low S-wave velocity in sediments containing methane hydrates. In an attempt to explain this observed P-wave and S-wave velocity structure at the transition from gas to hydrates, the effect of different hydrate models on elastic moduli and velocities are explored. After construction of an initial gas model, the properties of the hydrates are estimated using the bound averaging method together with the Voigt and Reuss bounds for elastic moduli. The result suggests that the hydrates becomes part of the rock matrix and softens the pores by fracturing. The additional formation of ice is required to obtain the desired P- to S-wave velocity ratio in the hydrate bearing sediments, indicating temperature conditions around the freezing point of water.read more
Citations
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Journal ArticleDOI
Seismic rock physical modelling for gas hydrate-bearing sediments
Xinxin Liu,Xingyao Yin,Xiwu Luan +2 more
TL;DR: In this article, the authors built a rock physical model for load-bearing and pore-filling gas hydrate-bearing sediments, describing the mineral compositions, pore connectivity, and the pore shape using effective media theory, and calculated the shear properties of pore filling gas hydrates using Patchy saturation theory and generalized Gassmann theory.
Blake Outer Ridge dataset
TL;DR: In this article, Biondi et al. presented a map of the Blake Outer Ridge, highlighting the area of known hydrate distribution as mapped from seismic bottom simulating reflectors (BSR).
References
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Journal ArticleDOI
Wave Velocities in Sediments
TL;DR: In this article, the relationship between porosity and compressional and shear velocities of porous sandstone, sand, grains, clay and brine systems was investigated using experimental data and models.
Journal ArticleDOI
Acoustic and resistivity measurements on rock samples containing tetrahydrofuran hydrates: Laboratory analogues to natural gas hydrate deposits
C. Pearson,J. Murphy,R. Hermes +2 more
TL;DR: In this paper, the authors report laboratory acoustic velocity and electrical resistivity measurements on Berea Sandstone and Austin Chalk samples saturated with a stoichiometric mixture of tetrahydrofuran (THF) and water.
Journal ArticleDOI
Fine structure of methane hydrate-bearing sediments on the Blake Outer Ridge as determined from deep-tow multichannel seismic data
M. M. Rowe,Joseph F. Gettrust +1 more
TL;DR: In this paper, high-resolution, deep-tow multichannel seismic data are used to investigate the detailed structure of sediments containing methane hydrate. But they are not suitable for the analysis of large-scale underground aqua-retrieval.
Fine structure of methane hydrate-bearing sediments on the Blake Outer ridge as determined from deep-tow multichannel seismic data. (Reannouncement with new availability information). Final report
M.M. Rowe,Joseph F. Gettrust +1 more
TL;DR: In this paper, high-resolution, deep-tow multichannel seismic data are used to investigate the detailed structure of sediments containing methane hydrate, showing that the material immediately beneath the bottom simulating reflector has anomalously low velocity, consistent with a layer of sediment containing free methane gas.
Proceedings ArticleDOI
Seismic AVO analysis of methane hydrate structures
Christine Ecker,David Lumley +1 more
TL;DR: In this article, a detailed amplitude versus offset (AVO) analysis of the Blake Outer Ridge seafloor seismic data was performed to explore the validity of models which might explain the origin of the bottom simulating reflector.
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