Ouagadougou reservoir energy storage

Are underground reservoirs suitable for large-scale energy storage?

The underground reservoirs for large scale energy storage are described. An extensive review of the criteria for site screening underground reservoirs is done. Large-scale underground energy storage technologies and reservoir types are matched. General criteria to all reservoir types are assessed.

How a reservoir can be used to store energy?

A reservoir made in a porous and permeable underground formation can be used to store Natural Gas, CO 2, Air, Hydrogen or even Thermal Energy. Storage of an energy carrying fluid requires a phase of compression and injection in gaseous state into the reservoir: the free-phase gas pushes the formation water away from the injection wells.

Can geological reservoirs be used for energy storage?

Electric energy storage technologies, involving the use of geological reservoirs offer large storage capacities and discharge rates [ 6 ], bringing all the advantages of a large-scale energy storage system while minimising environmental and social impacts, and the need for surface space.

What are potential storage reservoir sites in the geological underground?

Potential storage reservoir sites in the geological underground mainly comprise salt caverns, saline aquifers, depleted hydrocarbon reservoirs and rock caverns. Adapted from [ 22 ]. Essentially, a geological reservoir is prepared prior to injection, to effectively create an underground, pressurised storage container.

How do I choose the best underground reservoir technology?

Choosing what technology best fits each type of underground reservoir depends on many factors, such as the purpose of the energy storage facility, the geology of the reservoir in question, the efficiency of the technology, and also the economics of the pair reservoir/technology.

Can underground energy storage systems be mined?

On one hand, during construction or operation of underground energy storage systems, water inflow could be so great that mining or operation would be impossible. On the other hand, in arid regions or within the unsaturated zone, absence of both capillary water and water at hydrostatic head may prevent storage within a mined cavern.