ABSTRACT
Energy reserve is an important national strategic
demand. Rock salt is selected as an ideal energy re-
serve medium for its low-permeability and fine
creep behavior. Also, rock salt chambers in the deep
underground are widely recognized as a means of
energy reserves internationally. At present, large-
scale constructions of underground energy reservoirs
in rock salt have been carried out in China. Although
rock salt reserves have better performance in safety,
suitability and durability than other underground
medium for energy reserves, catastrophic accidents
such as surface subsidence, leak of oil and gas, cavi-
ty collapse, volume losing and so on, which lead to
harmful effects on the environment, human and the
safe operation of reservoirs which occurred in the
past thirty years via the usage of underground ener-
gy storages in rock salt (Yang et al. 2009). So, it is
significant to analyze the risk of underground gas re-
serves and study the variation of its reliability in a
total life cycle.
