Speaker
Description
The success of subsurface hydrogen storage depends not only on where injected gas migrates, but how fast it equilibrates with formation water — a process critical for pressure stabilization, containment assessment, and long-term safety. Here, we demonstrate that local injection rate, a controllable operational parameter, exerts non-local control over system-scale chemical equilibration: higher rates accelerate hydrogen dissolution and shorten shut-in stabilization time, whereas lower rates prolong non-equilibrium. Pore-scale simulations reveal this counterintuitive behavior stems from injection-rate-dependent gas–water interfacial area generation — a mechanism invisible to continuum models that assume static capillary relationships. Our findings identify injection-driven interfacial dynamics as a key lever for predicting and managing equilibration times in underground hydrogen storage.
| Country | China |
|---|---|
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