ABSTRACT
In order to cover the fluctuation of gas consumption,
more and more Asian countries start to store hydro-
carbon in underground storage facilities. In the
world there are two main underground storages for
natural gas, namely porous rock formations covered
by tight rock formation and large single caverns in
tight rock formation. Typical porous rock formations
are depleted gas or oil reservoirs and aquifers, which
can hold a large amount of natural gas. But these
storage facilities need many cushion gas and high
investment. Another disadvantage is the slow injec-
tion and withdraw rate. So they are often used to
cover the seasonal fluctuation of gas consumption.
Typical large single caverns are salt caverns. Due to
high deliverability, short filling period, salt caverns
are often used for peak shaving purposes. Other ad-
vantages include low percentage of cushion gas, re-
duced land requirement, less running cost etc.
