Journal of Jilin University(Earth Science Edition) ›› 2017, Vol. 47 ›› Issue (1): 179-188.doi: 10.13278/j.cnki.jjuese.201701204

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Temperature Distribution Characteristic of Jixian Reservoir in Beijing Depression

Yuan Lijuan1, Yang Fengtian2   

  1. 1. Beijng Geothermal Research Institute, Beijing 100143, China;
    2. College of Environment and Resources, Jilin University, Changchun 130021, China
  • Received:2016-05-17 Online:2017-01-26 Published:2017-01-26
  • Supported by:
    Supported by Beijing Municipal Finance Projects (PXM2016_158307_000013) and Youth Fund of National Natural Science Foundation of China (41202167)

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Abstract: In order to find out reservoir temperature distribution of geothermal reservoir in Beijing, aiming to complement the geothermal research of Beijing, data of 37 geothermal water samples from Beijing downtown, where has a relatively long development history of geothermal resources, including position, depth, temperature and chemistry, have been collected. Water-rock equilibrium state of the geothermal water is evaluated by the Na-K-Mg geothermometry, and Jixian Formation reservoir temperatures in the Beijing depression are calculated by using ion and SiO2 geothermometry. Vertical characteristics of reservoir temperature in the Jixian Formation are also analyzed. The results show that 35 out of 37 samples have not reached equilibrium, and the content of dissolved SiO2 is controlled by quartz in the geothermal water. Reservoir temperature of the Jianxian Formation within depth of 1 000-4 000 m ranges from 65.6-110.0℃, and its vertical variation is governed by difference of sedimentation. From 0 to 2 000 m, no obvious trend can be observed due to the drastic change in sedimentation; below 2 000 m, reservoir temperature increases with depth, and the geothermal gradient is 3.1℃/hm.

Key words: Beijing depression, Jixian reservior, geothermometry, reservoir temperature, distribution character

CLC Number: 

  • P632
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