A Geomechanical Model for Gas Hydrate Bearing Sediments Incorporating High Dilatancy, Temperature, and Rate Effects

Bohan Zhou, Marcelo Sanchez, Luciano Oldecop, Carlos Santamarina

Research output: Contribution to journalArticlepeer-review

Abstract

The geomechanical behavior of methane hydrate bearing sediments (MHBS) is influenced by many factors, including temperature, fluid pressure, hydrate saturation, stress level, and strain rate. The paper presents a visco-elastoplastic constitutive model for MHBS based on an elastoplastic model that incorporates the effect of hydrate saturation, stress history, and hydrate morphology on hydrate sediment response. The upgraded model is able to account for additional critical features of MHBS behavior, such as, high-dilatancy, temperature, and rate effects. The main components and the mathematical formulation of the new constitutive model are described in detail. The upgraded model is validated using published triaxial tests involving MHBS. The model agrees overly well with the experimental observations and is able to capture the main features associated with the behavior of MHBS.
Original languageEnglish (US)
Pages (from-to)4280
JournalEnergies
Volume15
Issue number12
DOIs
StatePublished - Jun 10 2022

ASJC Scopus subject areas

  • Computer Science(all)

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