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

机译：羊八井盆地热干岩地热资源开发方案

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摘要

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 5-15 km 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 × 10~9 MWa, 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 × 10~(11) m~3 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 104 MW 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 1000 MW installed capacity could be constructed initially to provide electricity production of 8.64 × 10~9 kWh per year.
机译：来自热干岩（HDR）的地热能被认为是一种几乎取之不尽的“绿色”能源，于1970年代首次开发和测试，导致在美国，日本，英国，法国和其他国家进行安装。在目前的工作中，对中国西藏羊八井地区5-15 km深度的液化岩体进行了详细分析。用有限元法确定了该地区地热场的温度分布。结果估计，羊八井地区的HDR地热资源为5.4×10〜9 MWa，代表了中国巨大的HDR地热能源潜在来源。在详细研究形成西藏HDR地热田的环境的大陆动力学，唐古拉山南坡和当雄-羊八井盆地的构造特征以及该地区原地应力的大小和方向的基础上提出了提取这些HDR地热资源的装置的设计：以最接近高温液化岩石区域的断层带作为人工油藏的位置，可以在下倾角的低点钻一个垂直注入井断层的一侧，在上方钻了两个浸入式生产井。这样，将创建一个体积为3×10〜（11）m〜3的人工储层：是英国康沃尔郡HDR地热储层体积的360倍，该储层采用水力压裂技术。对储层特征的调查（包括热交换区域的渗流分析，项目实施和投资分析）表明，可以建造104兆瓦容量的电站，预计使用寿命约为100年。对由一口注入井和两口生产井组成的地热提取系统的分析表明，最初可以建设一个装机容量为1000兆瓦的电站，以提供每年8.64×10〜9 kWh的发电量。

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  • 来源
    《Renewable energy》 |2012年第1期|p.490-495|共6页
  • 作者

    Zijun Feng; Yangsheng Zhao; Anchao Zhou; Ning Zhang;

  • 作者单位

    Mining Technology Institute, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China;

    Mining Technology Institute, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China,College of Mining Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China;

    College of Mining Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China;

    Mining Technology Institute, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tibet yangbajing; hot dry rock; artificial reservoir; in situ stress field; development program;

    机译：西藏羊八井干热岩人工水库原位应力场开发程序;

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