盐岩储气库最佳采气速率数值模拟研究

由于已采盐矿存在着大量的采卤溶腔群，对采卤溶腔群进行改造作为天然气储存库使用，能有效缩短储气库的建设周期，并消除采卤溶腔对环境带来的不利影响。基于盐矿地质资料、盐岩的力学试验及本构关系分析，对作为西气东输储气库使用4口采卤溶腔群进行了研究，通过三维数值模拟方法研究了该溶腔群在不同采气速率下盐腔周的应力状态和体积变形规律，并通过分析，对该溶腔群的最佳采气速率得出了有益的结论。

Investigation on optimized gas recovery velocity of natural gas storage in salt rock layer by numerical simulation

There are large numbers of brine-extracted caverns which can be reconstructed as the nature gas storage in the exploited salt mine. It can availably shorten the construction time of natural gas storage and eliminate the disadvantaged effect of brine-extracted caverns to the environment. Based on the geological data of the salt mine and the mechanical behavior of salt rock, the four brine-extracted caverns which will be reconstructed to the nature gas storages are studied by the three-dimensional numerical simulation. The stress state around the caverns and the volume convergence law of the caverns are studied under the various gas recovery velocities. The better conclusion about the optimized gas recovery velocity of natural gas storage is obtained by the research.