Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media
In this study we compare the use of kinetic and equilibrium reaction models in the simulation of gas (methane) hydrate behavior in porous media. Our objective is to evaluate through numerical simulation the importance of employing kinetic versus equilibrium reaction models for predicting the respons...
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ftcdlib:qt0t18j9cg 2023-05-15T17:12:05+02:00 Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media Kowalsky, Michael B. Moridis, George J. 2006-11-29 application/pdf http://www.escholarship.org/uc/item/0t18j9cg english eng eScholarship, University of California qt0t18j9cg http://www.escholarship.org/uc/item/0t18j9cg public Kowalsky, Michael B.; & Moridis, George J.(2006). Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/0t18j9cg Earth Sciences Gas hydrates Dissociation Kinetics Depressurization Thermal stimulation article 2006 ftcdlib 2016-04-02T18:36:25Z In this study we compare the use of kinetic and equilibrium reaction models in the simulation of gas (methane) hydrate behavior in porous media. Our objective is to evaluate through numerical simulation the importance of employing kinetic versus equilibrium reaction models for predicting the response of hydrate-bearing systems to external stimuli, such as changes in pressure and temperature. Specifically, we (1) analyze and compare the responses simulated using both reaction models for natural gas production from hydrates in various settings and for the case of depressurization in a hydrate-bearing core during extraction; and (2) examine the sensitivity to factors such as initial hydrate saturation, hydrate reaction surface area, and numerical discretization. We find that for large-scale systems undergoing thermal stimulation and depressurization, the calculated responses for both reaction models are remarkably similar, though some differences are observed at early times. However, for modeling short-term processes, such as the rapid recovery of a hydrate-bearing core, kinetic limitations can be important, and neglecting them may lead to significant under-prediction of recoverable hydrate. The use of the equilibrium reaction model often appears to be justified and preferred for simulating the behavior of gas hydrates, given that the computational demands for the kinetic reaction model far exceed those for the equilibrium reaction model. Article in Journal/Newspaper Methane hydrate University of California: eScholarship |
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University of California: eScholarship |
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language |
English |
topic |
Earth Sciences Gas hydrates Dissociation Kinetics Depressurization Thermal stimulation |
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Earth Sciences Gas hydrates Dissociation Kinetics Depressurization Thermal stimulation Kowalsky, Michael B. Moridis, George J. Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media |
topic_facet |
Earth Sciences Gas hydrates Dissociation Kinetics Depressurization Thermal stimulation |
description |
In this study we compare the use of kinetic and equilibrium reaction models in the simulation of gas (methane) hydrate behavior in porous media. Our objective is to evaluate through numerical simulation the importance of employing kinetic versus equilibrium reaction models for predicting the response of hydrate-bearing systems to external stimuli, such as changes in pressure and temperature. Specifically, we (1) analyze and compare the responses simulated using both reaction models for natural gas production from hydrates in various settings and for the case of depressurization in a hydrate-bearing core during extraction; and (2) examine the sensitivity to factors such as initial hydrate saturation, hydrate reaction surface area, and numerical discretization. We find that for large-scale systems undergoing thermal stimulation and depressurization, the calculated responses for both reaction models are remarkably similar, though some differences are observed at early times. However, for modeling short-term processes, such as the rapid recovery of a hydrate-bearing core, kinetic limitations can be important, and neglecting them may lead to significant under-prediction of recoverable hydrate. The use of the equilibrium reaction model often appears to be justified and preferred for simulating the behavior of gas hydrates, given that the computational demands for the kinetic reaction model far exceed those for the equilibrium reaction model. |
format |
Article in Journal/Newspaper |
author |
Kowalsky, Michael B. Moridis, George J. |
author_facet |
Kowalsky, Michael B. Moridis, George J. |
author_sort |
Kowalsky, Michael B. |
title |
Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media |
title_short |
Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media |
title_full |
Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media |
title_fullStr |
Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media |
title_full_unstemmed |
Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media |
title_sort |
comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media |
publisher |
eScholarship, University of California |
publishDate |
2006 |
url |
http://www.escholarship.org/uc/item/0t18j9cg |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Kowalsky, Michael B.; & Moridis, George J.(2006). Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/0t18j9cg |
op_relation |
qt0t18j9cg http://www.escholarship.org/uc/item/0t18j9cg |
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public |
_version_ |
1766068838153060352 |