Comprehensive feasibility study of two-well-horizontal caverns for natural gas storage in thinly-bedded salt rocks in China
Comprehensive feasibility study of two-well-horizontal caverns for natural gas storage in thinly-bedded salt rocks in China
复制标题
我国薄层盐岩两井水平洞室储气综合可行性研究
DOI：
10.1016/j.energy.2017.10.126
复制
发表时间：
2018-01-15
期刊：
影响因子：
9
通讯作者：
Wu, Fei
中科院分区：
文献类型：
--
作者：
Liu, Wei;Jiang, Deyi;Wu, Fei
地下盐穴为大型天然气储存提供了理想的空间。但是，目前在我国盐岩薄层地区修建单井垂直式（SWV）洞室的实践遇到了严重的问题。相反，两井水平（TWH）洞穴被提议作为一种可能的替代气体储存设施。因此，全面评价了TWH型洞库作为储气库的综合可行性。首先，确定了盐穴储气库可行性评价的框架和评价标准。通过物理模拟试验确定了TWH型洞室的施工工艺和洞室形状，并通过数值模拟得到了最佳洞室形状。第三，研究了泥岩夹层、循环运行方式等因素对三峡工程地下洞室群安全稳定性的影响。并对洞室的密封性进行了讨论。最后，通过对TWH型和SWV型洞室的可行性比较，表明TWH型洞室比SWV型洞室具有更好的安全性、更高的灵活性和更低的造价。综合分析结果表明，在盐岩储气库中，TWH型溶洞具有很高的可行性。(C)2017爱思唯尔有限公司出版
Underground salt caverns provide ideal space for large-scale natural gas storage. But the current practice of constructing single-well-vertical (SWV) caverns encounter serious problems in the thinly-bedded salt rocks in China. Instead, two-well-horizontal (TWH) caverns are proposed to serve as a possible alternative for gas storage facilities. Therefore the comprehensive feasibility of the TWH-caverns as gas storage were thoroughly evaluated. First, the frame-work and criteria of feasibility evaluation of gas storage salt caverns were determined. Then the construction process and shapes of TWH-cavern were determined by physical simulation tests, and an optimum cavern shape was obtained by numerical simulation. Thirdly, the effects of mudstone interbeds, cyclic operating modes on the serviceability and safety of TWH-cavern were investigated. The cavern tightness was discussed as well. In the end, a feasibility comparison between a TWH-cavern and a SWV-cavern was made, which shows that TWH-cavern possesses better safety, higher flexibility and lower cost than SWV-cavern. Comprehensive results show that the TWH-caverns have high feasibility as gas storage in thinly-bedded salt rocks. (C) 2017 Published by Elsevier Ltd.