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Abstract Based on the monitoring data of the pressure change in the observation well obtained during the operation process of the Jintan gas storage group，the first salt rock gas storage group in China，the volume shrinkage deformation of the cavity is studied through the observation of the brine pressure change in the cavity of the rock-salt cavity，and thereby the major creep parameters of the creep constitutive model of the salt bed in the gas storage region is back analyzed to make the calculation results conform to the actual status，and the problem that the numerical calculation is hard to be verified in the underground gas storage is solved. By combining the theoretical analysis and test，the monitoring method of observation well，by which the volume shrinkage deformation of the cavity can be derived，is provided and verified. The research results can be applied to research such as the prediction of the long-term volume shrinkage in the operation process of salt rock gas storage and the prediction of the ground surface settlement，and also offer the technical support for the long-term stability and safe operation of the salt rock gas storage group.
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Received: 20 August 2008
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