Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium
Methane Hydrates (MHs) are a promising energy source abundantly available in nature. Understanding the complex processes of MH formation and dissociation is critical for the development of safe and efficient technologies for energy recovery. Many laboratory and numerical studies have investigated th...
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ftcdlib:oai:escholarship.org:ark:/13030/qt5xj835ct 2024-02-04T10:02:05+01:00 Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium Yin, Zhenyuan Moridis, George Chong, Zheng Rong Tan, Hoon Kiang Linga, Praveen 2018-11-01 application/pdf https://escholarship.org/uc/item/5xj835ct unknown eScholarship, University of California qt5xj835ct https://escholarship.org/uc/item/5xj835ct public Engineering Affordable and Clean Energy Economics Energy Built environment and design article 2018 ftcdlib 2024-01-08T19:06:10Z Methane Hydrates (MHs) are a promising energy source abundantly available in nature. Understanding the complex processes of MH formation and dissociation is critical for the development of safe and efficient technologies for energy recovery. Many laboratory and numerical studies have investigated these processes using synthesized MH-bearing sediments. A near-universal issue encountered in these studies is the spatial heterogeneous hydrate distribution in the testing apparatus. In the absence of direct observations (e.g. using X-ray computed tomography) coupled with real time production data, the common assumption made in almost all numerical studies is a homogeneous distribution of the various phases. In an earlier study (Yin et al., 2018) that involved the numerical description of a set of experiments on MH-formation in sandy medium using the excess water method, we showed that spatially heterogeneous phase distribution is inevitable and significant. In the present study, we use as a starting point the results and observations at the end of the MH formation and seek to numerically reproduce the laboratory experiments of depressurization-induced dissociation of the spatially-heterogeneous MH distribution. This numerical study faithfully reproduces the geometry of the laboratory apparatus, the initial and boundary conditions of the system, and the parameters of the dissociation stimulus, capturing accurately all stages of the experimental process. Using inverse modelling (history-matching) that minimized deviations between the experimental observations and numerical predictions, we determined the values of all the important flow, thermal, and kinetic parameters that control the system behaviour, which yielded simulation results that were in excellent agreement with the measurements of key monitored variables, i.e. pressure, temperature, cumulative production of gas and water over time. We determined that at the onset of depressurization (when the pressure drop – the driving force of dissociation – is at its ... Article in Journal/Newspaper Methane hydrate University of California: eScholarship |
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Engineering Affordable and Clean Energy Economics Energy Built environment and design |
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Engineering Affordable and Clean Energy Economics Energy Built environment and design Yin, Zhenyuan Moridis, George Chong, Zheng Rong Tan, Hoon Kiang Linga, Praveen Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium |
topic_facet |
Engineering Affordable and Clean Energy Economics Energy Built environment and design |
description |
Methane Hydrates (MHs) are a promising energy source abundantly available in nature. Understanding the complex processes of MH formation and dissociation is critical for the development of safe and efficient technologies for energy recovery. Many laboratory and numerical studies have investigated these processes using synthesized MH-bearing sediments. A near-universal issue encountered in these studies is the spatial heterogeneous hydrate distribution in the testing apparatus. In the absence of direct observations (e.g. using X-ray computed tomography) coupled with real time production data, the common assumption made in almost all numerical studies is a homogeneous distribution of the various phases. In an earlier study (Yin et al., 2018) that involved the numerical description of a set of experiments on MH-formation in sandy medium using the excess water method, we showed that spatially heterogeneous phase distribution is inevitable and significant. In the present study, we use as a starting point the results and observations at the end of the MH formation and seek to numerically reproduce the laboratory experiments of depressurization-induced dissociation of the spatially-heterogeneous MH distribution. This numerical study faithfully reproduces the geometry of the laboratory apparatus, the initial and boundary conditions of the system, and the parameters of the dissociation stimulus, capturing accurately all stages of the experimental process. Using inverse modelling (history-matching) that minimized deviations between the experimental observations and numerical predictions, we determined the values of all the important flow, thermal, and kinetic parameters that control the system behaviour, which yielded simulation results that were in excellent agreement with the measurements of key monitored variables, i.e. pressure, temperature, cumulative production of gas and water over time. We determined that at the onset of depressurization (when the pressure drop – the driving force of dissociation – is at its ... |
format |
Article in Journal/Newspaper |
author |
Yin, Zhenyuan Moridis, George Chong, Zheng Rong Tan, Hoon Kiang Linga, Praveen |
author_facet |
Yin, Zhenyuan Moridis, George Chong, Zheng Rong Tan, Hoon Kiang Linga, Praveen |
author_sort |
Yin, Zhenyuan |
title |
Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium |
title_short |
Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium |
title_full |
Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium |
title_fullStr |
Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium |
title_full_unstemmed |
Numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium |
title_sort |
numerical analysis of experimental studies of methane hydrate dissociation induced by depressurization in a sandy porous medium |
publisher |
eScholarship, University of California |
publishDate |
2018 |
url |
https://escholarship.org/uc/item/5xj835ct |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
qt5xj835ct https://escholarship.org/uc/item/5xj835ct |
op_rights |
public |
_version_ |
1789968427117445120 |