Collapse control technology for interbeds in solution mining for oil/gas storage in multi-interbedded salt formation

In order to solve the technical problem of how to deal with the insoluble interbeds during solution mining for oil/gas storage in multi-interbedded salt formation, a method for calculating the limit span of interbed roof is presented. The influence laws of salt cavern leaching tactics on interbed collapse are revealed, and several technical measures to regulate and control collapse time of interbeds are given. According to the relevant research results and considering the technical characteristics of solution mining by means of the single well convection method, the collapse control technology for interbeds in solution mining for oil/gas storage in multi-interbedded salt formation is proposed. Finally, the application of collapse control technology for interbeds in increasing the available volume of caverns is illustrated by taking a salt cavern of Jintan as an example.