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Development program of hot dry rock geothermal resource in the Yangbajing Basin of China

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  • Feng, Zijun
  • Zhao, Yangsheng
  • Zhou, Anchao
  • Zhang, Ning

Abstract

Geothermal energy from hot dry rock (HDR), considered an almost inexhaustible source of “green” energy, was first developed and tested in the 1970s, leading to installations in America, Japan, Britain, France and other countries. In the present work, a liquating rock mass at a depth of 5–15km in the Tibet Yangbajing region in China was subjected to detailed analysis. The temperature distribution of the geothermal field in the region was determined by the finite element method. The results estimate that the HDR geothermal resource of the Yangbajing region is 5.4×109MWa, representing a huge potential source of HDR geothermal energy for China. Based on detailed research into the continental dynamics of the environment forming the HDR geothermal field of Tibet, along with the tectonic characteristics of the southern slope of Tanggula Mountain and the Dangxiong–Yangbajing Basin, and the magnitude and orientation of the in situ stresses in the region, the design of an arrangement for extracting these HDR geothermal resources is proposed: taking the fault zone nearest the high-temperature liquating rock region as the location of an artificial reservoir, a vertical injection well could be drilled at a low point on the downdip side of the fault, and two dipping production wells drilled higher up. In this way, an artificial reservoir 3×1011m3 in volume would be created: 360 times the volume of the HDR geothermal reservoir in Cornwall, UK, which uses hydrofracturing. An investigation of the reservoir features, including seepage analysis of the heat exchange area, project implementation and investment analysis, indicates that a 104MW capacity power station with a projected operating life of approximately 100 years could be constructed. An analysis of a geothermal extraction system comprising one injection well and two production wells suggest that a power station of 1000MW installed capacity could be constructed initially to provide electricity production of 8.64×109kWh per year.

Suggested Citation

  • Feng, Zijun & Zhao, Yangsheng & Zhou, Anchao & Zhang, Ning, 2012. "Development program of hot dry rock geothermal resource in the Yangbajing Basin of China," Renewable Energy, Elsevier, vol. 39(1), pages 490-495.
    • Handle: RePEc:eee:renene:v:39:y:2012:i:1:p:490-495
    DOI: 10.1016/j.renene.2011.09.005
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    References listed on IDEAS

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    1. Wan, Zhijun & Zhao, Yangsheng & Kang, Jianrong, 2005. "Forecast and evaluation of hot dry rock geothermal resource in China," Renewable Energy, Elsevier, vol. 30(12), pages 1831-1846.
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