Global sensitivity-based determination of dominant properties for thermo-hydro-mechanical behavior of hydrate-bearing sediments during gas production operation
Abstract
Numerical simulations of thermo-hydro-mechanical behavior of hydrate-bearing sediments have significant importance for prediction of gas production, water production and sediment deformation for a future gas production operation. Since the sediment undergoes the highly coupled processes, however, it is still not clear how selected properties (i.e. input parameters) affect the overall complex behavior at various stages of the operation. Therefore, determination and quantification of the significance of each parameter are in high demand and will provide insights into the interactive processes. This work presents a first attempt to quantify the importance of each input parameter on gas production, water production and sediment deformation through variance-based global sensitivity analyses. The analyses are based on a simple wellbore-scale numerical simulation of homogeneous hydrate-bearing sediments subjected to depressurization. Furthermore, methods of experimental determination for the dominant geomechanical parameters are also presented.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFM.B21G0502U
- Keywords:
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- 0468 Natural hazards;
- BIOGEOSCIENCESDE: 0486 Soils/pedology;
- BIOGEOSCIENCESDE: 3004 Gas and hydrate systems;
- MARINE GEOLOGY AND GEOPHYSICSDE: 4316 Physical modeling;
- NATURAL HAZARDS