Volume 48 Issue 3
Jun.  2020
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LI Zhongcheng, WU Jianguang, WANG Jianzhong, WU Xiang, LU Guojun. Hydrogeochemical evolution of No.15 coal seam and limestone K2 in southern Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(3): 75-80. DOI: 10.3969/j.issn.1001-1986.2020.03.011
Citation: LI Zhongcheng, WU Jianguang, WANG Jianzhong, WU Xiang, LU Guojun. Hydrogeochemical evolution of No.15 coal seam and limestone K2 in southern Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(3): 75-80. DOI: 10.3969/j.issn.1001-1986.2020.03.011
shu

Hydrogeochemical evolution of No.15 coal seam and limestone K2 in southern Qinshui basin

  • China United Coalbed Methane Corporation Ltd., Beijing 100015, China

Funds: 

National Science and Technology Major Project(2017ZX05064)

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  • Received Date: January 09, 2019
  • Revised Date: July 15, 2019
  • Published Date: June 24, 2020
    Graphical Abstract
    • Abstract
  • Based on the water test data of No.15 coal roof K2 limestone and No.15 coalbed methane well in the southern Qinshui basin, the characteristics, types and the genetic mechanism of water chemical composition were systematically studied by statistical and comparative methods. The evolution model was built to systematically describe the various reactions and effects of limestone and coalbed water in the recharge zone, runoff zone and detention zone. The results show that the K2 limestone water and the No.15 coal seam water will undergo ion exchange, mixing and CO2 action. The K2 limestone water is mainly Ca-Mg-HCO3-SO4 type in the recharge zone and the strong runoff zone, and the water type of the coal seam is Na-HCO3-SO4 type; K2 limestone water in slow-flow area is generally Na-Ca-Cl-HCO3 type, while coalbed water is mainly Na-Cl-HCO3 or Na-HCO3 type; K2 limestone water is the same as the coal seam water in detention area, and it is Na-HCO3 or Na-Cl-HCO3 water type. The study aims to provide a reliable hydrogeological basis for the development of No.15 coalbed methane.
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    • References (20)
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