Multi-well combined solution mining for salt cavern energy storages and its displacement optimization

Youqiang Liao, Tongtao Wang, Zhongxin Ren, Duocai Wang, Wei Sun, Peng Sun, Jingcui Li and Xianjian Zou

Energy, 2024, vol. 288, issue C

Abstract: Improving the water solution mining rate of the salt rock layer while reducing energy consumption is the core idea for promoting the construction of salt cavern energy storage. In this work, a novel multi-well combined solution mining method for salt cavern energy storages was presented, and a displacement optimization model incorporating sub-models for outlet brine concentration, solution mining rate, and energy consumption of water injection was proposed to maximize the solution mining efficiency. The accuracy of the proposed model is verified by comparing the simulated results with the field data. The results show that under basically the same solution mining rate, the energy consumption of brine injection can decrease by 18.82 %. If 0.49 % of the solution mining rate of the salt cavern can be sacrificed, energy consumption can be reduced by 7.40 %. A special focus was given to the well selection schemes, which indicated that optimization of well selection schemes could reduce energy consumption by 3.61 %. This work could add further insights into the inter-coupling relationship between outlet brine concentration, solution mining rate, and energy consumption of water injection, and help to reduce the energy consumption of water injection and improve solution mining rate.

Keywords: Salt cavern energy storage; Multi-well combined solution mining; Displacement optimization; Energy consumption; Solution mining rate; Outlet brine concentration (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:288:y:2024:i:c:s0360544223031869

DOI: 10.1016/j.energy.2023.129792

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