Gas Migration in EBS and Geosphere (GMT) - Experimental Concept
The experimental procedure consists of excavating a cavern, emplacing the engineered barrier systems (concrete silo, sand/bentonite buffer) and injecting gas in the centre of the concrete silo.
Laboratory studies, detailed site characterisation activities (hydrogeological, rock mechanical) and modelling studies complement the main experiment.
Experimental Concept Plan
How would gas injected inside the concrete silo move through the sand / bentonite?
Four different gas flow regimes can occur according to
- gas generation rates
- the confining stress
NB for low flow rates, diffusion in solution is also a possibility.
|Classic Displacement flow:
Gas Pressure < Confining Stress
|Flow around silo:
Gas Pressure > Vertical and Horizontal Confining Stress
|Flow along top of silo: Gas Pressure > Vertical Confining Stress||Fracture of EBS: Gas Pressure >>Confining Stress|