Geologic hydrogen, including both naturally occurring and stimulated, is a promising primary energy resource. The Earth is a natural laboratory where hydrogen can be observed from surface features (e.g., springs, fairy circles) and subsurface structures (e.g. geothermal wells, chromite mines). The Earth is also a natural factory where both natural ...
The Earth’s subsurface is fractured and highly heterogeneous, and fractures often act as preferential pathways that dominate fluid flow and solute transport. This fracture-controlled behavior strongly influences a variety of subsurface technologies including carbon and hydrogen storage, natural or stimulated hydrogen production, geothermal energy, enhanced hydrocarbon recovery, and long-term geologic ...
