Estimation of composite thermal conductivity of a heterogeneousmethane hydrate sample using iTOUGH2

Conference · Mon May 15 00:00:00 EDT 2006

OSTI ID:920336

Gupta, Arvind; Kneafsey, Timothy J; Moridis, George J; Seol, Yongkoo; Kowalsky, Michael B; Sloan, Jr, E D

We determined the composite thermal conductivity (ktheta) ofa porous methanehydrate sample (composedof hydrate, water, and methan egas) as a function of density using iTOUGH2. X-ray computed tomography(CT) was used to visualize and quantify the density changes that occurredduring hydrate formation from granular ice. The composite thermalconductivity was estimated and validated by minimizing the differencesbetween the observed and the predicted thermal response using historymatching. The estimated density-dependent composite thermal conductivityranged between 0.25 and 0.58 W/m/K.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE. Assistant Secretary for Fossil Energy.Gas
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 920336
• Report Number(s): LBNL-60619; R&D Project: G33201; BnR: AB0565000; TRN: US200818%%1140
• Resource Relation: Conference: TOUGH Symposium 2006, Lawrence Berkeley NationalLaboratory, Berkeley, California, May 15-17, 2006
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
36 MATERIALS SCIENCE
03 NATURAL GAS
GAS HYDRATES
HYDRATES
METHANE
THERMAL CONDUCTIVITY
WATER
gas hydrate thermal conductivity inverse modelingiTOUGH