天然气盐岩洞室群长期存储能力

对某天然气存储场盐岩洞室群的长期变形进行了三维有限元法流变分析。盐岩洞室周边附近区域内围岩的应力较低,其分布呈现出抽水井附近的水压力特征。当达到设计使用年限(80a)时,该天然气存储场内单一洞室的剩余存储能力保有初始存储能力的29.1%。进一步研究表明,当洞室间距较大时,单一洞室的剩余存储能力较大。间距400m的洞室群中单一洞室的剩余存储能力比间距280m的大5%～10%。

Long-term storage capability of gas caverns in salt rock

Analyses on the long-term deformation of gas storage caverns in a salt dome were carried out using the 3D-FEM. The stresses in salt rock surrounding a cavern are lower than those in the virgin ground and with distribution as hydrostatical pressure surrounding a pumping well.The surplus storage capability of one of the caverns will remain 29.1% of the original value after 80 designed operation years. Further researches show that the above mentioned value will be greater when the cavern space is larger. The surplus storage capability of one of the caverns with a space of 400 m is 5 to 10 percentages greater than that with a space of 280 m.