Numerical Simulation on Minimum Allowable Operation Pressure of Multi-interbedded Salt Cavern Gas Storage

By uniaxial brazilian tension,uniaxial compression and triaxial compression test etc.the performance parameters of multi-interbedded salt rock mechanics of some oilfield H-1 well are obtained,and the corresponded Mohr-Coulomb Criterion expression is also achieved by regression.Numerical simulation is carried out for the multi-interbedded salt cavern gas storage by using ABAQUS software,and the influence law of the minimum allowable operation pressure of multi-interbedded salt cavern gas storage affected by the buried depth,top span,top salt rock thickness,thickness of the top adjacent sandwich,elastic modulus and other parameters have been analyzed.The results show that the minimum allowable operation pressure of gas storage is increasing with the increase of the height of top span,while it is decreasing with the increase of elastic modulus of the top adjacent sandwich.However,the influence of the top salt rock thickness and the thickness of top adjacent sandwich on the minimum allowable operation pressure of gas storage is not remarkable.It is considered that the research results can be used as references for the safe operation of multi-interbedded salt cavern gas storage.