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Numerical Investigation on the Effect of Cementing Properties on the Thermal and Mechanical Stability of Geothermal Wells

Author

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  • Jongmuk Won

    (School of Civil & Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA)

  • Hyun-Jun Choi

    (School of Civil, Environmental, & Architectural Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 02841, Korea)

  • Hyobum Lee

    (School of Civil, Environmental, & Architectural Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 02841, Korea)

  • Hangseok Choi

    (School of Civil, Environmental, & Architectural Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 02841, Korea)

Abstract

In this paper, a two-dimensional (2-D) Finite Element (FE) analysis of a geothermal well was performed with respect to five different cross-sections corresponding to the design specifications for the geothermal well that is currently constructed in Pohang, South Korea. Among the essential components (such as ground formation, casing, and cementing) of a geothermal well, the thermal and mechanical stability of the cementing component was discussed based on a series of parametric studies with consideration of the thermal conductivity and Young’s modulus of the cementing component. With increasing number of casing layers, the cementing component experiences less stress concentration. In addition, the lower thermal conductivity of the cementing material is advantageous for effectively controlling radial displacement. Consequently, it should be noted in geothermal well cementing construction that long-term strength degradation of the cementing might cause the severe structural instability of an entire geothermal well.

Suggested Citation

  • Jongmuk Won & Hyun-Jun Choi & Hyobum Lee & Hangseok Choi, 2016. "Numerical Investigation on the Effect of Cementing Properties on the Thermal and Mechanical Stability of Geothermal Wells," Energies, MDPI, vol. 9(12), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:12:p:1016-:d:84357
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    References listed on IDEAS

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    1. Chen, Huijuan & Goswami, D. Yogi & Stefanakos, Elias K., 2010. "A review of thermodynamic cycles and working fluids for the conversion of low-grade heat," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(9), pages 3059-3067, December.
    2. Lee, Youngmin & Park, Sungho & Kim, Jongchan & Kim, Hyoung Chan & Koo, Min-Ho, 2010. "Geothermal resource assessment in Korea," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(8), pages 2392-2400, October.
    3. Won, Jongmuk & Lee, Dongseop & Na, Kyunguk & Lee, In-Mo & Choi, Hangseok, 2015. "Physical properties of G-class cement for geothermal well cementing in South Korea," Renewable Energy, Elsevier, vol. 80(C), pages 123-131.
    4. Kestin, J. & Wakeham, W.A., 1978. "A contribution to the theory of the transient hot-wire technique for thermal conductivity measurements," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 92(1), pages 102-116.
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    Cited by:

    1. Bergen, Sophia L. & Zemberekci, Lyn & Nair, Sriramya Duddukuri, 2022. "A review of conventional and alternative cementitious materials for geothermal wells," Renewable and Sustainable Energy Reviews, Elsevier, vol. 161(C).
    2. Ionica Oncioiu & Anca Gabriela Petrescu & Eugenia Grecu & Marius Petrescu, 2017. "Optimizing the Renewable Energy Potential: Myth or Future Trend in Romania," Energies, MDPI, vol. 10(6), pages 1-14, May.
    3. Salaheldin Elkatatny, 2019. "Development of a Homogenous Cement Slurry Using Synthetic Modified Phyllosilicate while Cementing HPHT Wells," Sustainability, MDPI, vol. 11(7), pages 1-14, March.

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