CUED Publications database

Effects of methane hydrate gas production on mechanical responses of hydrate bearing sediments in local production region at Eastern Nankai trough

Zhou, M and Soga, K and Xu, E and Yamamoto, K (2015) Effects of methane hydrate gas production on mechanical responses of hydrate bearing sediments in local production region at Eastern Nankai trough. In: UNSPECIFIED pp. 1707-1712..

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Abstract

The deformation processes of hydrate sediments during hydrate gas production are complex due to the coupled Thermo-Hydro-Mechanical (THM) phenomena of deformation, fluid flow, heat flow, and phase changes. Among all these aspects, the mechanical response (i.e. The stress and strain profiles) near production region that recovers methane gas from the hydrate bearing sediments is most crucial for triggering potential geohazards. In this study, a fully coupled numerical simulator CMHGS (Cambridge Methane Hydrate Geomechanics Simulator) was used to simulate the large scale field behavior during gas production trial at Eastern Nankai Trough, Japan. The investigation results suggest that the stress and strain profiles of the hydrate bearing sediments near the production region during hydrate gas production are related to the hydrate dissociation status. Typical element-based mechanical responses of both far field elements and near wellbore elements are examined. This study provides important guidelines for future site production test as well as further experimental and numerical research. © 2015 Taylor & Francis Group, London.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:05
Last Modified: 09 Nov 2017 01:29
DOI: