Challenges of constructing salt cavern gas storage in China

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Xia, Yan^1 ; Yuan, Guangjie^1 ; Ban, Fansheng^1 ; Zhuang, Xiaoqian^1 ; Li, Jingcui^1

CNPC Drilling Research Institute, Blk A34 CNPC Innovation Centre, West of Xishatun Bridge, Shahe Town, Changping District, Beijing, China^1

关键词: Circulating pressure;    Circulating pressure loss;    Complex geological condition;    Conventional constructions;    Domestic consumption;    Engineering practices;    Salt cavern gas storages;    Technical difficulties;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012153/pdf
DOI  :  10.1088/1755-1315/94/1/012153

来源: IOP

【 摘 要 】

After more than ten years of research and engineering practice in salt cavern gas storage, the engineering technology of geology, drilling, leaching, completion, operation and monitoring system has been established. With the rapid growth of domestic consumption of natural gas, the requirement of underground gas storage is increasing. Because high-quality rock salt resources about 1000m depth are relatively scarce, the salt cavern gas storages will be built in deep rock salt. According to the current domestic conventional construction technical scheme, construction in deep salt formations will face many problems such as circulating pressure increasing, tubing blockage, deformation failure, higher completion risk and so on, caused by depth and the complex geological conditions. Considering these difficulties, the differences between current technical scheme and the construction scheme of twin well and big hole are analyzed, and the results show that the technical scheme of twin well and big hole have obvious advantages in reducing the circulating pressure loss, tubing blockage and failure risk, and they can be the alternative schemes to solve the technical difficulties of constructing salt cavern gas storages in the deep rock salt.