复杂岩性盐穴储气库水溶特性及造腔对策

我国盐穴储气库建库地质条件复杂，优选建库区域及层段是盐穴储气库高效建库的基础。以平顶山、淮安、安宁、楚州4座盐穴储气库为研究对象，针对不同建库区、不同建库层段、不同特征岩性开展岩心水溶组分分析化验，归纳了4座储气库建库地层水溶特性，分析了不同地区造腔影响因素，并提出相应建库对策:（1）平顶山加强夹层垮塌的控制和预测；（2）淮安采取水平井工艺避开厚夹层；（3）安宁采取防垢、除垢措施减小管道结垢对工程的不利影响；（4）楚州采取提高残渣有效空间动用率的方式增大库容。

Water soluble performance and solution mining countermeasures of salt-cavern gas storages with complex lithologies

The construction of salt-cavern underground gas storages in China is faced with the problem of complex geological conditions, so the selection of UGS construction areas and intervals is the base of efficient construction of salt-cavern UGS. Taking four salt-cavern UGS (Pingdingshan, Huaian, Anning and Chuzhou) as the research objects, this paper tested and analyzed the water-soluble compositions of the cores of different UGS construction areas, UGS construction intervals and lithological characteristics and summarized the water soluble performance of their UGS construction formations. Then, the influence factors of solution mining in different areas were analyzed, and the corresponding UGS construction countermeasures were proposed as follows. First, as for Pingdingshan UGS, it is necessary to strengthen the control and prediction of interlayer collapse. Second, as for Huaian UGS, the technology of horizontal well shall be adopted to evade thick interlayers. Third, as for Anning UGS, scale control and removal measures shall be taken to alleviate the adverse impact of pipe scaling on the engineering. Fourth, as for Chuzhou UGS, it is recommended to expand the storage capacity by increasing residue’s effective space utilization rate.