摘要
为研究康定中谷地区热储温度及热储特征,本文通过地质调查,利用水化学、地热钻孔资料,采用地热温标、多矿物平衡温标以及混合模型方法,分析了康定中谷地区热储特征,计算了热储温度及冷水混合比例。研究结果表明:(1)康定中谷地区热水以HCO3-Na型水为主,浅井水、自然出露温泉与深井水存在明显差异,所有地下热水均处于未成熟水区域;(2)不同地热温标计算结果对比发现,Na-K温标计算结果偏高,SiO2有较好的适用性,热储温度为84.43℃～127.57℃,多矿物平衡温标计算温度为121.6℃～183.6℃;(3)硅-焓方程法与硅-焓图解法计算的冷水混入比例为39.47%～86.93%,初始温度为172.58℃～258.23℃;(4)三叠系砂、板岩地层中的构造裂隙及第四系地层中的松散孔隙为研究区主要热储,在开发利用中要合理判断次生热储的位置,避免钻孔打穿次生热储。
In order to study the heat storage temperature and heat storage characteristics of the Zhonggu area in Kangding,this paper analyzes the characteristics of heat storage in the Zhonggu area of Kangding by geological survey,using water chemistry and geothermal drilling data,geothermal temperature scale,multi-mineral balance temperature scale and mixed model method.The heat storage temperature and the cold water mixing ratio are calculated. The results show that:(1)The hot water in the Zhonggu area of Kangding is dominated by HCO3-Na water.There is a significant difference between shallow well water,natural exposed hot spring and deep well water.All underground hot water is in the immature water area;(2)The different calculation results of geothermal temperature scale show that Na-K temperature scale is high,SiO2 has good applicability,the heat storage temperature is 84.43℃~127.57℃,and the temperature of multi-mineral balance temperature scale is 121.6℃~183.6℃;(3)The ratio of cold water mixed is calculated by the silicon-enthalpy equation method and the silicon-enthalpy diagram method is 39.47%~86.93%,and the initial temperature is 172.58℃~258.23℃;(4)The tectonic fractures in the Triassic sand and slate strata,the quaternary strata and the loose pores are the main heat storage in the study area. In the development and utilization,the location of the secondary heat storage should be reasonably judged to avoid drilling the secondary heat storage.
作者
黄珣
李晓
余中友
陶广斌
HUANG Xun;LI Xiao;YU Zhong-you;TAO Guang-bin(College of Environment & Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)
出处
《地质灾害与环境保护》
2018年第4期96-104,共9页
Journal of Geological Hazards and Environment Preservation
关键词
热储
地热温标
混合模型
康定中谷
geothermal reservoir
geothermometry
Mixing models
Kangding Zhonggu
