盐穴储气库水溶造腔工艺优化研究与现场应用

Study on Improving the Solution-mining Processes of Salt-cavern Gas Storage and Field Applications of the Improved Process Technology

王元刚 周冬林 邓琳 付亚平 管笛

WANG Yuangang ZHOU Donglin DENG Lin FU Yaping GUAN Di

中国石油天然气股份有限公司西气东输管道分公司储气库项目部, 江苏 镇江 212000

Gas Storage Project Department of West-to-east Gas Pipeline Company, PetroChina, Zhenjiang, Jiangsu 212000, China

盐穴储气库在天然气行业所占比重越来越大，金坛储气库作为国内第一座投产的盐穴储气库，经过工程建设实践发现，很多溶腔工艺存在较大的优化空间。通过分析储气库水溶造腔流程，对造腔过程中涉及到的提高造腔效率，减小造腔耗能以及盐层最大化利用进行分析，提出了水溶造腔的优化工艺：采用反循环造腔大幅度增加排卤盐度，减小井下作业次数缩短不必要的停井时间以加快水溶造强进程，安装光纤界面仪实现阻溶剂界面的实时监控，优化注水量大幅度减小能耗，处理厚夹层以及整体扩容腔体对盐层进行最大化利用。

While the salt-cavern gas storage solution is becoming increasingly popular in the natural gas industry, engineering practice shows significant improvement opportunities for many solution-mining processes of the Jintan gas storage, the first commissioned salt-cavern gas storage in China. The solution-mining processes of the gas storage were analyzed to identify opportunities to improve solution-mining efficiency, minimize solution-mining energy consumption, and maximize the utilization of salt layers. The improvement opportunities identified are:employing reverse-circulation solution mining to increase greatly the salinity of the discharged brine; minimizing the number of underground operations and eliminating unnecessary interruptions to mining operations, thereby reducing solution-mining cycle time; installing a fiber-optic interface meter to enable real-time monitoring of the solution-inhibitor interface; optimizing the quantity of water injected to reduce energy consumption; and treating thick intercalated beds and expanding the overall cavern capacity to maximize the utilization of salt layers.

10.11885/j.issn.1674-5086.2017.09.06.04