Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (2): 134-142.doi: 10.6040/j.issn.1672-3961.0.2024.033

• Civil Engineering • Previous Articles     Next Articles

The prevention and control of seawater intrusion into underground water-sealed oil storage cavern on an island

WANG Jingkui1, QIAO Liping2, WANG Fei2, WANG Zhechao3, LI Wei3   

  1. WANG Jingkui1, QIAO Liping2, WANG Fei2, WANG Zhechao3, LI Wei3(1. CNOOC Petrochemical Engineering Company Limited, Qingdao 266101, Shandong, China;
    2. College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China;
    3. Key Laboratory of Ministry of Education for Safe Mining in Deep Metal Mines, Northeastern University, Shenyang 110004, Liaoning, China
  • Published:2025-04-15

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Abstract: In order to prevent seawater intrusion caused by large-scale underground excavation on the island, which affected the construction and operation safety of the underground water-sealed oil storage cavern, a research on the prevention and control of seawater intrusion had been carried out on the basis of the underground water-sealed oil storage cavern project on a certain island. Through the finite element numerical simulation method, the seepage field and seawater intrusion control effect of underground water-sealed oil storage cavern under the working conditions of different horizontal water curtain design parameters during the construction period of cavern excavation without water curtain and after 50 years of operation period were obtained. The study showed that: cavern excavation without water curtain does not meet the water-sealed property, additional water curtain system was required; the groundwater level was elevated after oil storage in the cavern compared to the cavern vacancy, and the water inflow and seawater intrusion were reduced; the installation of horizontal water curtains only during the operation period could not completely prevent the entry of seawater, but could only control it to a certain extent; the effectiveness of water-sealed property, water inflow and seawater intrusion control was positively correlated with the length of water curtain holes and water injection pressure, and the water injection pressure had a higher degree of influence.

Key words: island environment, seawater intrusion, underground water-sealed oil storage cavern, water curtain system, water-sealed property

CLC Number: 

  • TU432
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