SCIENTIA GEOGRAPHICA SINICA ›› 2022, Vol. 42 ›› Issue (11): 2039-2046.doi: 10.13249/j.cnki.sgs.2022.11.018

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Permeability and Brine Enrichment Mechanism of Brine Reservoir in the Mahai Salt Lake, Qaidam Basin

Hu Shuya1(), Ren Jie1, Li Jiqing2, Zhao Quansheng1()   

  1. 1. School of Environmental Science and Engineering, Qingdao University, Qingdao 266100, Shandong, China
    2. Ecological Environment Monitoring Center of Chengyang Sub-branch of Qingdao Ecological Environment Bureau, Qingdao 266109, Shandong, China
  • Received:2022-03-18 Revised:2022-06-11 Online:2022-11-30 Published:2022-11-20
  • Contact: Zhao Quansheng;


The permeability coefficient of brine reservoir in the Mahai Salt Lake of Qaidam Basin was determined by field pumping test, and its permeability was analyzed by the occurrence characteristics and sedimentary environment of underground brine. The results showed that most of the rock salt layers in this area are impure, the rock salt crystals are wrapped with mud and sand, and the crystals are also filled with mud and sand. During the period of rock salt deposition, the permeability of the brine reservoirs formed during the evolution of the geological environment varied considerably due to the influence of floods and intermittent rivers, and the connectivity of the regional subsurface brine was weak. According to the drilling data of 27 mining wells and the monitoring data of underground brine in the experimental mining area, the brine reservoir was classified differentially. The brine reservoirs exposed by the drilling were divided into three types. The brine enrichment performance of different types of brine reservoirs is quite different. Through the analysis of the lithology, pore characteristics and supply conditions of borehole cores, the basic conditions for strong brine enrichment performance were obtained: The brine reservoir has a natural good particle skeleton and a stable brine supply source and channel. According to the permeability of brine reservoir and the law of brine enrichment, the experimental mining area of the Mahai Salt Lake was divided into different underground brine enrichment sections.

Key words: permeability coefficient, pumping test, brine enrichment, brine reservoir, the Mahai Salt Lake

CLC Number: 

  • P641.3