Compressional and shear wave velocities in uncemented sediment containing gas hydrate
Tae Sup Yun,Franco Matias Francisca,Franco Matias Francisca,J. C. Santamarina,Carolyn D. Ruppel +4 more
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In this article, the authors measured compressional and shear wave velocities in fine-grained sands subjected to low confinement and monitored during formation of tetrahydrofuran hydrate.Abstract:
[1] The competing hypotheses for gas hydrate formation at the particle scale in sediments describe processes of pore-filling, frame-building, or cementation. New measurements of compressional (VP) and shear wave (VS) velocities in fine-grained sands subjected to low confinement and monitored during formation of tetrahydrofuran hydrate indicate that hydrate nucleates in the pore space (presumably at grain boundaries) and grows with limited impact on the sediment shear stiffness, VP, and VS until crystals begin to interact with the granular skeleton at ∼40% hydrate concentration. VS increases significantly more than VP at higher hydrate concentrations, reflecting larger changes in the specimen's shear stiffness than its bulk stiffness. The results indicate that seismic velocities and/or their ratio (VP/VS) have limited capability for locating hydrate or constraining hydrate concentrations.read more
Citations
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Journal ArticleDOI
Physical properties of hydrate-bearing sediments
William F. Waite,J. C. Santamarina,Douglas D. Cortes,Brandon Dugan,David N Espinoza,John T. Germaine,Jaewon Jang,Jongwon Jung,Timothy J. Kneafsey,H. Shin,Kenichi Soga,William J. Winters,Tae Sup Yun +12 more
TL;DR: A review of the current understanding of phenomena involved in gas hydrate formation and the physical properties of hydrate-bearing sediments can be found in this paper, where the magnitudes and interdependencies of these properties are critically important for predicting and quantifying macroscale responses of hydrates to changes in mechanical, thermal, or chemical boundary conditions.
Journal ArticleDOI
Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate
TL;DR: In this paper, the results of comprehensive axial compression triaxial tests were conducted at up to 1 MPa confining pressure on sand, crushed silt, precipitated silt and clay specimens with closely controlled concentrations of synthetic hydrate.
Journal ArticleDOI
Gas hydrates in sustainable chemistry
Aliakbar Hassanpouryouzband,Aliakbar Hassanpouryouzband,Aliakbar Hassanpouryouzband,Edris Joonaki,Edris Joonaki,Mehrdad Vasheghani Farahani,Satoshi Takeya,Carolyn D. Ruppel,Jinhai Yang,Niall J. English,Judith M. Schicks,Katriona Edlmann,Hadi Mehrabian,Zachary M. Aman,Bahman Tohidi +14 more
TL;DR: This review summarizes the different properties of gas hydrates as well as their formation and dissociation kinetics and then reviews the fast-growing literature reporting their role and applications in the aforementioned fields, mainly concentrating on advances during the last decade.
Journal ArticleDOI
Challenges, Uncertainties, and Issues Facing Gas Production From Gas-Hydrate Deposits
George J. Moridis,Timothy S. Collett,Mehran Pooladi-Darvish,Steven H. Hancock,Carlos Santamarina,Ray Boswell,Timothy J. Kneafsey,Jonny Rutqvist,Michael B. Kowalsky,Matthew T. Reagan,E. Dendy Sloan,Amadeu K. Sum,Carolyn A. Koh +12 more
TL;DR: A review of the status of the effort toward commercial gas production from hydrates can be found in this paper, where the authors discuss advances, requirement and suggested practices in gas hydrate (GH) prospecting and GH deposit characterization, and to review the associated technical, economic and environmental challenges and uncertainties.
Journal ArticleDOI
Hydrate morphology: Physical properties of sands with patchy hydrate saturation
TL;DR: In this paper, the physical properties of gas hydrate-bearing sediments depend on the volume fraction and spatial distribution of the hydrate phase, and the host sediment grain size and the state of effective stress determine hydrate morphology in sediments.
References
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Book
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E. Dendy Sloan,Carolyn A. Koh +1 more
TL;DR: In this paper, the authors compared the properties of hydrates and ice with those of natural gas and showed the effect of thermodynamic inhibitors on the formation of hydrate formation and dissolution process.
Journal ArticleDOI
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Journal ArticleDOI
Sediments with gas hydrates: Internal structure from seismic AVO
TL;DR: In this paper, the amplitude variation with offset (AVO) data from a bottom simulating reflector (BSR) offshore Florida was used to infer the internal structure of the hydrated sediment.
Journal ArticleDOI
Methane hydrate formation in partially water-saturated Ottawa sand
TL;DR: In this paper, the authors measured compressional wave speed measurements through partially water-saturated, methane hydrate-bearing Ottawa sands suggest hydrate surrounds and cements sediment grains.