Modeling gas hydrate bearing sediments using a coupled approach

M. Sanchez*, A. Shastri, Juan Carlos Santamarina

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Gas hydrates are crystalline clathrate compounds made of water and a low molecular gas like methane. Gas hydrates are generally present in oil-producing areas and in permafrost regions. Methane hydrate deposits can lead to large-scale submarine slope failures, blowouts, platform foundation failures, and borehole instability. Gas hydrates constitute also an attractive source of energy as they are estimated to contain very large reserves of methane. Hydrate formation, dissociation and methane production from hydrate bearing sediments are coupled Thermo-Hydro-Mechanical (THM) processes that involve, amongst other, exothermic formation and endothermic dissociation of hydrate and ice phases, mixed fluid flow and large changes in fluid pressure. A comprehensive THM formulation is briefly presented here. Momentum balance, mass balance and energy balance equations take into consideration the interaction among all phases (i.e., solid, liquid, gas, hydrates and ice) and mechanical equilibrium. Constitutive equations describe the intrinsic THM behavior of the sediment. Simulation results conducted for hydrate bearing sediments subjected to boundary conditions highlight the complex interaction among THM processes in hydrate bearing sediments.

Original languageEnglish (US)
Title of host publicationAdvances in Unsaturated Soils - Proceedings of the 1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013
Pages545-550
Number of pages6
StatePublished - Apr 1 2013
Event1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013 - Cartagena de Indias, Colombia
Duration: Feb 20 2013Feb 22 2013

Publication series

NameAdvances in Unsaturated Soils - Proceedings of the 1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013

Other

Other1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013
CountryColombia
CityCartagena de Indias
Period02/20/1302/22/13

ASJC Scopus subject areas

  • Soil Science

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