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Oil injection and production in high-impurity salt mines oil storage: Laboratory experiments
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Xinxing WEI1, 2, Xilin SHI1, 2, *, Yinping LI1, 2, 3, Hongling MA1, 2, Peng LI1, 2, Chunhe YANG1, 2
Chinese Journal of Rock Mechanics and Engineering | 2026, 45(2) : 466 - 482
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Chinese Journal of Rock Mechanics and Engineering | 2026, 45(2): 466-482
Oil injection and production in high-impurity salt mines oil storage: Laboratory experiments
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Xinxing WEI1, 2, Xilin SHI1, 2, *, Yinping LI1, 2, 3, Hongling MA1, 2, Peng LI1, 2, Chunhe YANG1, 2
Affiliations
  • 1.State Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
  • 2.University of Chinese Academy of Sciences, Beijing 100049, China
  • 3.Hubei Key Laboratory of Geo-environmental Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
Published: 2026-02-01 doi: 10.3724/1000-6915.jrme.2025.0664
Outline
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In response to the engineering challenges associated with limited construction scale and slow development speed in high-impurity salt mines oil storage, this study proposes a novel technical approach that utilizes sediment voids to expand oil storage capacity. Laboratory experiments and theoretical analyses were conducted on sediment particles from the Yunying salt mine in Hubei Province. A evaluation system encompassing sediment characterization and sediment void storage capacity was established. The mechanism of oil injection and production under the fluid-solid coupling of oil/brine and sediment was systematically studied. The sediment void clogging risk during oil injection and production was explored. The migration rule of oil and brine in sediment voids were elucidated. The results indicate that Yunying sediments possess a void ratio exceeding 40% with favourable connectivity in total, meeting the requirements for oil storage. Multiple oil injection and production cycles demonstrate low flow resistance and a linear mass-time correlation. Dominant flow channels are established only during the initial injection, stabilizing thereafter. The oil-brine interface exhibits fingering phenomena without abnormal pressure or rate fluctuations. Transient clogging events occur randomly, presenting an overall low risk. The oil injection pressure increases stepwise as the oil-brine interface descends. The hydrophilic properties of the sediments improve brine injection and oil production efficiency through capillary forces. These findings provide scientific support for the construction of high-impurity salt mines oil storage facilities.

underground engineering  /  deep underground energy storage  /  salt cavern oil storage  /  insoluble sediment particles  /  high-impurity salt mine  /  oil injection and production
Xinxing WEI, Xilin SHI, Yinping LI, Hongling MA, Peng LI, Chunhe YANG. Oil injection and production in high-impurity salt mines oil storage: Laboratory experiments[J]. Chinese Journal of Rock Mechanics and Engineering, 2026 , 45 (2) : 466 -482 . DOI: 10.3724/1000-6915.jrme.2025.0664
Funding
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  • National Key R&D Program of China(2024YFB4007100)
  • National Natural Science Foundation of China(52374069)
  • Youth Innovation Promotion Association CAS(Y2023089)
Appendix
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Year 2026 volume 45 Issue 2
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3
1
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Article Info
doi: 10.3724/1000-6915.jrme.2025.0664
  • Receive Date：2025-09-11
  • Online Date：2026-06-18
  • Published：2026-02-01
Article Data
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History
  • Received：2025-09-11
  • Revised：2025-10-10
Funding
National Key R&D Program of China(2024YFB4007100)
National Natural Science Foundation of China(52374069)
Youth Innovation Promotion Association CAS(Y2023089)
Affiliations
    1.State Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
    3.Hubei Key Laboratory of Geo-environmental Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China

Corresponding:

* SHI Xilin (1983–), research fellow, is engaged in research on the underground energy storage. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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