Estimate of Geothermal Resources Potential for Hot Dry Rock in the Continental Area of China
WANG Jiyang1, HU Shengbiao1, PANG Zhonghe1, HE Lijuan1, ZHAO Ping1, ZHU Chuanqing1, RAO Song1,2, TANG Xiaoyin1,2, KONG Yanlong1,2, LUO Lu1,2, LI Weiwei1,2
1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:As one of the clean renewable energy, geothermal energy is very competitive. According to its genesis and exploration conditions, geothermal resources could be divided into two kinds, that is, one is hydrothermal resources and the other one is Hot Dry Rock (HDR) geothermal resources. Because of its universality and high temperature, HDR geothermal resources have great potential for projecting future development. The assessment of HDR geothermal resources potential is the base of HDR resources exploration. Here the heat flow map in the continental area of China is updated on the basis of more new heat flow data. Then the HDR geothermal resources are estimated using volume methods with a thermal physical access in the continental area of China (3 km —10 km). Results show that the total HDR geothermal energy is 20.9×106EJ, which is equivalent to standard coal of 714.9×1012t. If the recoverable energy is 2% by computing, then it is 168 times of conventional hydrothermal energy, and it is equivalent to 4,400 times of total annual energy consumption during the year of 2010 in China. Nevertheless, due to the limitation of economics and technology, the HDR geothermal resources exploration within the depth of 4km—7km accompanied with an expected temperature of 150—250 ℃ should be conducted in the near future. Several target regions for HDR geothermal resources exploration are proposed, including South Tibet, West Yunnan (Tengchong), the southeast coast of China (Zhejiang, Fujian and Guangdong), North China (BBB basin), the southeast regions of Ordos Basin (Fenwei Graben), and Northeast China (Songliao Basin). Finally, the future tasks involving geothermal resources research are listed.
汪集旸;胡圣标;庞忠和;何丽娟;赵平;朱传庆;饶松;唐晓音;孔彦龙;罗璐;李卫卫;. 中国大陆干热岩地热资源潜力评估[J]. , 2012, 30(32): 25-31.
WANG Jiyang;HU Shengbiao;PANG Zhonghe;HE Lijuan;ZHAO Ping;ZHU Chuanqing;RAO Song;TANG Xiaoyin;KONG Yanlong;LUO Lu;LI Weiwei;. Estimate of Geothermal Resources Potential for Hot Dry Rock in the Continental Area of China. , 2012, 30(32): 25-31.