Ashgabat underground energy storage

What is deep underground energy storage?

Deep underground energy storage is the use of deep underground spaces for large-scale energy storage, which is an important way to provide a stable supply of clean energy, enable a strategic petroleum reserve, and promote the peak shaving of natural gas.

Why is underground gas storage important for China's Energy Security?

Therefore, accelerating the construction of underground gas storage is an important strategic demand to ensure China’s energy security. Based on the above analysis, the use of deep underground spaces for large-scale energy storage is one of the main methods for energy storage.

Does large-scale energy storage require a lot of storage space?

Large-scale energy storage requires a considerable amount of storage space. In 2017, Ewe Gasspeicher GmbH, a German energy company, announced progress in building the world’s largest liquid flow battery using underground salt caverns in northwest Germany as liquid storage tanks in order to achieve large-scale storage (Fig. 6) .

Why do we need deep underground energy storage caverns?

Ensuring the long-term function of deep underground energy storage Due to the long service life and the flammable and explosive energy storage medium, ensuring the long-term functions (i.e., availability, sealing, stability, and safety) of energy storage caverns are a prerequisite for the implementation of deep underground energy storage.

What are the disadvantages of deep underground energy storage?

3. Key theoretical and technical research challenges of deep underground energy storage Compared with the salt domes abroad, salt rocks in China are typical lacustrine sedimentary bedded rock salt , , , , and Chinese rock salt caverns thus have three disadvantages for energy storage. ① The rock salt formation is thin.

Does a salt basin have a natural gas storage capacity?

In general, the middle area of the salt basin sinks, and the edge area uplifts. As a special geological structure, a fault has the characteristics of high permeability, large porosity, and low strength, and thus has no natural gas storage capacity. Rather, it is a potential leakage channel in deep salt caverns used for energy storage.