Creep Model Analysis of Rock Salt Cavern Under Normal Operations

Abstract

The quality of numerical simulation results depends on the availability of creep parameters, based on the characteristic of the creep parameters in engineering applications, put a great deal of emphasis on the choice of the creep model under injection and production, and propose that it is more meaningful to make the coefficient of determination (R 2 ) of creep parameters be to 1 under normal operations (in the range of inside pressure from 5 to 30 MPa) than complete stress (so called “[0, +1)”). So, One side, to formulate the linear creep constitutive mode is one of the bases of the testing results and inside pressure standard under normal operations; For another, to evaluate the variability of the creep velocity in different creep parameters, which are linear and power function creep constitutive. The results show that linear creep constitutive mode has less parameters and is simple, but also variation of the creep rate is little in a relatively wide range. Linear creep model can be applied to research such as the prediction of the long-term volume shrinkage in the operation process of salt rock storage.