国内盐穴储气库空间利用技术及展望

Review and outlook of space utilization technology for salt-cavern gas storage in China

何奇 冯永存 邓金根 李海涛 完颜祺琪 李康 柳洪鹏

HE Qi FENG Yongcun DENG Jin’gen LI Haitao WANYAN Qiqi LI Kang LIU Hongpeng

中国石油大学(北京)油气资源与探测国家重点实验室 中国石油大学(北京)石油工程学院 中国石油勘探开发研究院地下储库研究中心 大庆钻探工程公司钻井二公司

State Key Laboratory of Petroleum Resources and Prospect, China University of Petroleum (Beijing), Beijing 102249, China College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China Research Center of Underground Gas Storage, PetroChina Research Institute of Exploration and Development, Beijing 100083, China No. 2 Drilling Company, CNPC Daqing Drilling Engineering Co., Ltd., Daqing 163413, Heilongjiang, China

盐穴储气库具有储层渗透性低、损伤恢复能力强、注采率高、短期吞吐量大、垫层气量低并可完全回收等优点，在国外应用广泛，然而国内盐穴储气库由于盐岩品位差，造腔结束后大量盐岩不溶物堆积在腔体底部形成沉渣，沉渣空隙中存在着大量无法被排出的卤水，造成了储气空间资源的巨大浪费，如何使其腔体空间得到最大化利用是当下需要亟待解决的问题。对国内盐穴储气库盐层地质及其底部沉渣空间利用技术进行了调研，指出虽然在沉渣上方进行注气排卤工艺已日臻成熟，但还需对排卤管柱下入沉渣底部技术进一步深入研究。从管柱下入和起出、管柱下入后的堵塞问题及解决方案、管径参数优化以及未来储氢等方面提出了相关建议，以期对国内盐穴储气库空间利用率技术研究提供借鉴。

Salt-cavern gas storage, characterized by the low reservoir permeability, high damage restoration capacity, high injection-production ratio, and the small amount of required cushion gas that is also fully recoverable, is found with extensive applications. However, due to the inferior quality of salt rocks, massive insoluble salt rock materials accumulate in the formed salt cavity, and a large amount of brine exists in the pores of such sediments and cannot be drained. This leads to a tremendous spatial waste of gas storage, and how to maximize the utilization of the salt cavity space is a problem demanding prompt solutions. The geology of salt layers of China’s salt-cavern gas storage and the space utilization technology for basal sediments were reviewed, which pointed out that further investigation is required for placing the brine drainage string into the base of insoluble sediments, although the gas-driven brine drainage above such sediments has increasing technical maturity. In terms of the running in and out the pipe string, the plugging problem after the string is placed and corresponding solutions, pipe diameter optimization, and future hydrogen storage, Suggestions were made to provide references for technical research on the salt-cavern gas storage space utilization in China.

10.13639/j.odpt.2022.06.008