摘要
青海省是我国地热资源相对丰富的地区,但其主要地热能开发利用方式长期以来为效率较低的直接利用.以青海东北部地热异常明显的共和盆地为典型研究区,依据前期地热地质调查和地球物理工作成果,在盆地北部施工了终孔深度为1 852m的DR2井,获取了温度达84.2℃的地热流体.在此基础上,建立了青海省首个试验地热发电站,设计年平均净发电量为114kW.与利用高温地热流体发电的西藏羊八井地热电站不同,青海共和试验地热电站是青藏高原利用中低温地热流体发电的典范,有望为青海省能源结构优化做出开拓性贡献.总体来看,共和盆地地热流体温度较高、水量丰富、具有较大的发电潜力,但在开发利用过程中也应注意结垢问题.
Qinghai Province is characterized by relatively abundant geothermal resources in China, but geothermal energy utilization has been suffering from low efficiency due to the dominant direct use over a long period. Taking Gonghe Basin located in northeastern Qinghai as the study area, we explore the issue in this paper on the basis of the previous geothermal geological and geophysical investigations. A borehole （DR2） with a depth of 1 852 m in the north part of the basin is drilled and geothermal fluid with a temperature up to 84. 2 ℃ can be extracted from DR2, based on which the first geothermal power plant in Qinghai with an annual net electricity generation capacity of 114 kW is established. Different from the Yangbajing geothermal power plant in Tibet where high-temperature geothermal fluids are exploited for electricity generation, the Gonghe pilot power plant in Qinghai is a typical example of middle-low-enthalpy geothermal power generation, which leads the optimization of energy struc- ture in Qinghai Province. In general, the geothermal fluids from Gonghe are featured with comparatively high temperatures and discharge rates, and therefore have a great potential for power generation. However, scaling may occur during the exploitation of Gonghe geothermal fluid in view of its chemical composition, which should be addressed in the process.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2014年第9期1317-1322,共6页
Earth Science-Journal of China University of Geosciences
基金
青海省科技计划项目(No.2013-G-Q08A)
关键词
地热发电
中低温地热流体
共和盆地
青海
geothermal electricity generation
middle-low-enthalpy geothermal fluid
Gonghe Basin
Qinghai province.
