Energy analysis and determination of controlling mechanisms of dissociation for hydrate reservoirs via tracking of dissociation front

A number of dissociation techniques like depressurization, thermal stimulation, CO2 exchange, etc. have been reported and investigated for natural gas hydrates in literature. However, dissociation of hydrate reservoirs is a complex process that is actually governed by several parameters. Hence, when...

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Bibliographic Details
Published in:Arabian journal of geosciences 2021-04, Vol.14 (7), Article 609
Main Authors: Khan, Shadman Hasan, Dixit, Gaurav, Majumder, Chandrajit Balo, Arora, Amit
Format: Article
Language:English
Subjects:
Carbon dioxide
Computational fluid dynamics
Dissociation
Drawdown
Earth and Environmental Science
Earth science
Earth Sciences
Energy
Energy conversion
Energy harvesting
Fluid flow
Gas hydrates
Heat exchange
Heat transfer
Hydrates
Matrix methods
Natural gas
Natural gas industry
Original Paper
Parameters
Permeability
Pressure reduction
Reservoirs
Stimulation
Thermal conductivity
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Summary:A number of dissociation techniques like depressurization, thermal stimulation, CO2 exchange, etc. have been reported and investigated for natural gas hydrates in literature. However, dissociation of hydrate reservoirs is a complex process that is actually governed by several parameters. Hence, when inspected closely, the dissociation characteristics are a reflection of how these parameters are interlinked with each other. The present study is designed to numerically simulate a matrix of 21 different cases, which comprises an in-depth analysis for thermal stimulation, drawdown pressure, permeability, intrinsic rate constant, and thermal conductivity. The focus of the current study is motivated by practical interest, which aims at deciphering the associated mechanisms with hydrate dissociation. Over the years, different researchers have outlined the role of mechanisms such as heat transfer (HT), fluid flow (FF), and dissociation (D). The governing mechanisms are deduced through mathematical fitting and plotting of thermodynamic parameters for deciphering associated mechanisms. A “characteristic exponent” is determined for each of the cases to identify and delineate the different mechanisms for each of the 21 cases. Further, energy conversion from hydrate and energy quantification has been described in detail. As such, this information pool about hydrate dissociation is vital and necessary for efficient energy harvesting from hydrate reservoirs from varied geological settings and composition.
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-021-06944-4