对接井盐穴储气库沉渣空间利用实验研究

Experimental Study on Using Residue Void Space in Butt Well Salt Cavern Gas Storage

对接井盐穴储气库建库盐层由于盐岩品位差、盐层薄、夹层多等特点,造腔结束后大量盐岩不溶物堆积在腔体底部形成沉渣,沉渣及空隙中的卤水占据了部分储气空间。文中分析了沉渣空间的形成及影响,在采用现场岩心构造不溶物沉渣的基础上,利用物理模拟装置开展了沉渣空间空隙体积及有效储气空间实验研究与分析。实验结果表明,沉渣空间约有52.4%的空间被卤水填充。通过注气排卤,可驱替出沉渣空间内约8.21%的卤水,腾出该部分空间用于储气。

Due to the characteristics of low-grade rock salt,thin salt layers,and multiple interbeded layers in the butt well salt cavern gas storage,a large amount of insolubles accumulated at the bottom of the cavity to form sediment.The brine and brine in the void occupied a part of the storage.In this paper,the formation and influence of sediment space were analyzed.Based on the preparation of salt rock insoluble matter,a physical simulation device was used to carry out experimental research and analysis of the void space and effective gas storage space of the sediment.The test result shows about 52.4%of the sediment space is filled with brine.By injecting gas and discharging brine,about 8.21%of the brine in the sediment space can be driven out,and this space can be freed up for gas storage.