Based on the statistics of salt cavern oil/gas storage accidents abroad

a study of salt cavern oil/gas storage risk assessment is conducted using risk matrix analysis in order to provide statistical proof for the risk management during construction and operation. This thesis analyzes the salt cavern oil/gas storage’s probability of tremendous accident

risk grade

accident types and the main accident causes. Research shows that the accident probability of a single salt cavern during construction and operation is 1.51%

and the general risk grade is between acceptable and unacceptable

so the related departments should pay more attention on its risk prevention mechanism; three main types of the tremendous accidents are oil and gas leakage

cavern failure and earth surface subsidence respectively; different from other two types whose risk grades are permissible

the risk grade of oil and gas leakage is acceptable

which calls for special attention; the most important causes of these accidents are casing failure

excessive creep and human error

and also overground setting failure and caprock breakage.