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盐穴地下储气库通过地下盐矿开采、溶蚀形成的地下空间,进行天然气的储存。在储气库的运营过程中,由于盐岩蠕变,腔体体积收缩会产生地面沉降或地面塌陷。在储气库运营过程中建立地面沉降监测网,捕捉因地层蠕变产生的地面沉降具有重要的意义。详细地介绍了我国第一个盐矿储气库的地面沉降监测,并分析运行过程中的地面沉降变化规律。分析揭示,监测数据与腔体体积的收缩具有较好的吻合性。
Saline hole underground gas storage through underground salt mining, dissolution of the formation of underground space for natural gas storage. During the operation of the gas reservoir, due to the creep of salt rock, the volume contraction of the cavity will cause land subsidence or ground collapse. It is of great significance to establish the land subsidence monitoring network during the operation of gas storage to capture the land subsidence caused by the formation creep. The ground subsidence monitoring of the first salt mine gas storage in China is introduced in detail, and the variation rule of land subsidence during operation is analyzed. Analysis revealed that the monitoring data has good agreement with the volume shrinkage of the cavity.