Numerical Modelling of Methane Hydrate Dissociation in Sandy Porous Media by Depressurization with a Parametric Study

2018 ◽  
Author(s):  
Zhenyuan Yin ◽  
George Moridis ◽  
Hoon Kiang Tan ◽  
Praveen Linga
Keyword(s):  
Porous Media ◽  
Numerical Modelling ◽  
Parametric Study ◽  
Methane Hydrate ◽  
Hydrate Dissociation

scholarly journals Study of the Critical Pore Radius That Results in Critical Gas Saturation during Methane Hydrate Dissociation at the Single-Pore Scale: Analytical Solutions for Small Pores and Potential Implications to Methane Production from Geological Media

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 210
Author(s):  
Ioannis Nikolaos Tsimpanogiannis ◽  
Emmanuel Stamatakis ◽  
Athanasios Konstantinos Stubos
Keyword(s):  
Porous Media ◽  
Analytical Solutions ◽  
Methane Production ◽  
Methane Hydrate ◽  
Pore Radius ◽  
Hydrate Dissociation ◽  
Gas Saturation ◽  
Dissociation Temperature ◽  
Critical Gas Saturation ◽  
Pore Body

We examine the critical pore radius that results in critical gas saturation during pure methane hydrate dissociation within geologic porous media. Critical gas saturation is defined as the fraction of gas volume inside a pore system when the methane gas phase spans the system. Analytical solutions for the critical pore radii are obtained for two, simple pore systems consisting of either a single pore-body or a single pore-body connected with a number of pore-throats. Further, we obtain critical values for pore sizes above which the production of methane gas is possible. Results shown in the current study correspond to the case when the depression of the dissociation temperature (due to the presence of small-sized pores; namely, with a pore radius of less than 100 nm) is considered. The temperature shift due to confinement in porous media is estimated through the well-known Gibbs-Thompson equation. The particular results are of interest to geological media and particularly in the methane production from the dissociation of natural hydrate deposits within off-shore oceanic or on-shore permafrost locations. It is found that the contribution of the depression of the dissociation temperature on the calculated values of the critical pore sizes for gas production is limited to less than 10% when compared to our earlier study where the porous media effects have been ignored.

Influence of thermal stimulation on the methane hydrate dissociation in porous media under confined reservoir

2016 ◽  
Vol 147 ◽  
pp. 547-559 ◽  
Author(s):  
Vishnu Chandrasekharan Nair ◽  
S. Ramesh ◽  
G.A. Ramadass ◽  
Jitendra S. Sangwai
Keyword(s):  
Porous Media ◽  
Methane Hydrate ◽  
Thermal Stimulation ◽  
Hydrate Dissociation

Numerical analysis of core-scale methane hydrate dissociation dynamics and multiphase flow in porous media

2016 ◽  
Vol 153 ◽  
pp. 221-235 ◽  
Author(s):  
Lin Chen ◽  
Hikaru Yamada ◽  
Yuki Kanda ◽  
Guillaume Lacaille ◽  
Eita Shoji ◽  
...  
Keyword(s):  
Porous Media ◽  
Numerical Analysis ◽  
Multiphase Flow ◽  
Methane Hydrate ◽  
Flow In Porous Media ◽  
Hydrate Dissociation ◽  
Dissociation Dynamics

Effects of water-gas two-phase flow on methane hydrate dissociation in porous media

Fuel ◽  
2019 ◽  
Vol 255 ◽  
pp. 115637 ◽  
Author(s):  
Mingjun Yang ◽  
Huiru Sun ◽  
Bingbing Chen ◽  
Yongchen Song
Keyword(s):  
Porous Media ◽  
Methane Hydrate ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Hydrate Dissociation ◽  
Water Gas
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