Estimation of composite thermal conductivity of a heterogeneous methane hydrate sample using iTOUGH2

We determined the composite thermal conductivity (ktheta) of a porous methanehydrate sample (composedof hydrate, water, and methan e gas) as a function of density using iTOUGH2. X-ray computed tomography (CT) was used to visualize and quantify the density changes that occurred during hydrate formati...

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Bibliographic Details
Main Authors: Gupta, Arvind, Kneafsey, Timothy J., Moridis, George J., Seol, Yongkoo, Kowalsky, Michael B., Sloan Jr., E.D.
Format: Article in Journal/Newspaper
Language:English
Published: eScholarship, University of California 2006
Subjects:
Earth Sciences
Materials Sciences
Environmental Energy Technologies
gas hydrate thermal conductivity inverse modeling iTOUGH
Methane hydrate
Online Access:http://www.escholarship.org/uc/item/3z45639r
Description
Summary:We determined the composite thermal conductivity (ktheta) of a porous methanehydrate sample (composedof hydrate, water, and methan e gas) as a function of density using iTOUGH2. X-ray computed tomography (CT) was used to visualize and quantify the density changes that occurred during hydrate formation from granular ice. The composite thermal conductivity was estimated and validated by minimizing the differences between the observed and the predicted thermal response using history matching. The estimated density-dependent composite thermal conductivity ranged between 0.25 and 0.58 W/m/K.

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