Salinity Effects on Pore-Scale Methane Gas Hydrate Dissociation

2018 ◽  
Vol 123 (7) ◽  
pp. 5599-5608 ◽  
Author(s):  
Stian Almenningen ◽  
Eirik Iden ◽  
Martin A. Fernø ◽  
Geir Ersland
Keyword(s):  
Gas Hydrate ◽  
Pore Scale ◽  
Hydrate Dissociation ◽  
Methane Gas ◽  
Salinity Effects

Submarine slope failure due to gas hydrate dissociation: a preliminary quantification

2007 ◽  
Vol 44 (3) ◽  
pp. 314-325 ◽  
Author(s):  
M F Nixon ◽  
J LH Grozic
Keyword(s):  
Slope Stability ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Numerical Study ◽  
Fluid Pressure ◽  
Slope Failures ◽  
Case Histories ◽  
Hydrate Dissociation ◽  
Methane Gas ◽  
Submarine Slope

Gas hydrates are icelike compounds composed of water and methane gas in very compact form. There is substantial evidence from case histories that links gas hydrate dissociation to submarine slope failures and other geohazards. Theoretical analyses have also shown that upon dissociation gas hydrates will cause an increase in fluid pressure and a reduction in effective stress and thus result in loss of the soil strength. This paper presents a preliminary quantification of the effects of gas hydrate dissociation through development of a pore-pressure model that was incorporated into one- and two-dimensional slope stability analyses. The ensuing numerical study investigated submarine slope stability through parametric studies and application to two important case histories and found that dissociation of even small amounts of hydrate can have a significant destabilizing effect. Yet whether gas hydrate dissociation can alone cause large-scale slope failures has still to be demonstrated as there are often many destabilizing processes; however, this research highlights the importance of assessing the effects of gas hydrate dissociation on the behaviour of submarine slopes.Key words: gas hydrates, slope stability, marine, offshore, methane gas, instability.

Experimental and Theoretical Investigation of Methane-Gas-Hydrate Dissociation in Porous Media

1991 ◽  
Vol 6 (01) ◽  
pp. 69-76 ◽  
Author(s):  
M.H. Yousif ◽  
H.H. Abass ◽  
M.S. Selim ◽  
E.D. Sloan
Keyword(s):  
Porous Media ◽  
Theoretical Investigation ◽  
Gas Hydrate ◽  
Hydrate Dissociation ◽  
Methane Gas

scholarly journals Pore-Scale Visualization of CH4 Gas Hydrate Dissociation under Permafrost Conditions

2021 ◽  
Author(s):  
Jyoti Shanker Pandey ◽  
Stian Almenningen ◽  
Nicolas von Solms ◽  
Geir Ersland
Keyword(s):  
Gas Hydrate ◽  
Pore Scale ◽  
Hydrate Dissociation

Review of natural gas hydrate dissociation effects on seabed stability

2021 ◽  
Author(s):  
Min Zhang ◽  
Ming Niu ◽  
Shiwei Shen ◽  
Shulin Dai ◽  
Yan Xu
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Natural Gas Hydrate ◽  
Hydrate Dissociation

Synthesis of methane gas hydrate in porous sediments and its dissociation by depressurizing

2002 ◽  
Vol 122 (2-3) ◽  
pp. 239-246 ◽  
Author(s):  
Hisashi O Kono ◽  
Sridhar Narasimhan ◽  
Feng Song ◽  
Duane H Smith
Keyword(s):  
Gas Hydrate ◽  
Methane Gas ◽  
Porous Sediments

Improving the Accuracy of Gas Hydrate Dissociation Point Measurements

2006 ◽  
Vol 912 (1) ◽  
pp. 924-931 ◽  
Author(s):  
B. TOHIDI ◽  
R. W. BURGASS ◽  
A. DANESH ◽  
K. K. ØSTERGAARD ◽  
A. C. TODD
Keyword(s):  
Gas Hydrate ◽  
Hydrate Dissociation

Simulation of Arctic Gas Hydrate Dissociation in Response to Climate Change: Basin-Scale Assessment

2011 ◽  
Author(s):  
Matthew T. Reagan ◽  
George J. Moridis ◽  
Scott M. Elliott ◽  
Mathew Maltrud
Keyword(s):  
Climate Change ◽  
Gas Hydrate ◽  
Hydrate Dissociation ◽  
Scale Assessment ◽  
Basin Scale
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