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Natural Gas Geoscience ›› 2020, Vol. 31 ›› Issue (11): 1585-1592.doi: 10.11764/j.issn.1672-1926.2020.03.014

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Finding of the Dongping economic Helium gas field in the Qaidam Basin， and Helium source and exploration prospect

Xiao-bao ZHANG1,2,3(),Fei ZHOU3,Zhan-yuan CAO1,2,3,Ming-liang LIANG4   

  1. 1.Petroleum Resources Research Center，Northwest Institute of Eco?Environments and Resources，CAS，Lanzhou 730000，China
    2.Key Laboratory of Petroleum Resources Research，Gansu Province，Lanzhou 730000，China
    3.Qinghai Oil Field Company，CNPC，Dunhuang 736202，China
    4.China Academy of Geological Sciences，Institute of Geomechanics，Beijing 100081，China
  • Received:2020-02-17 Revised:2020-03-23 Online:2020-11-10 Published:2020-11-24

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Abstract:

In order to further clarify the distribution of Helium resources in Qaidam Basin， the geochemical characteristics of natural gas in Dongping and other gas fields were analyzed. The results show that the Helium content of 21 natural gas samples from Dongping 1， Dongping 3 well areas in Dongping Gas Field and Jiantan 1 well area in Jiandingshan Gas Field is more than 0.05%， reaching an economic level， which has a minimum value of 0.07%， a maximum of 1.069%， and an average of 0.386%， therefore the economic Helium fields were found in the basin. The minimum 3He/4He of the Dongping Gas Field and its neighboring Niudong Gas Field is 1.01×10-8， the maximum is 3.62×10-8 and the average is 1.86×10-8， in an order of 1.86×10-8， showing a crust-sourced origin. A comprehensive analysis exhibits that the economic helium fields are sourced from the granite and granitic gneiss base. The granite and granitic gneiss base in the basin is widely distributed， which means the exploration prospect is very broad.

Key words: Economic helium gas field, Crust source, Granitic base, Dongping Gas Field, Qaidam BasinFoundation Items： The General Program of Natural Science Foundation of China （Grand No. 41972135）, The Youth Program of Natural Science Foundation of China （Grand No. 41702150）

CLC Number: 

  • TE122.1
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