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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2018  >  40(2): 193-199
NI Chunhua, LIU Guangxiang, ZHU Jianhui, WU Xiaoqi, BAO Jianping. Origin and source of natural gas in the Upper Paleozoic in Hangjinqi area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(2): 193-199. doi: 10.11781/sysydz201802193
Citation: NI Chunhua, LIU Guangxiang, ZHU Jianhui, WU Xiaoqi, BAO Jianping. Origin and source of natural gas in the Upper Paleozoic in Hangjinqi area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(2): 193-199. doi: 10.11781/sysydz201802193
shu

Origin and source of natural gas in the Upper Paleozoic in Hangjinqi area, Ordos Basin

doi: 10.11781/sysydz201802193
  • 1.

    School of Earth Environment and Water Resources, Yangtze University, Wuhan, Hubei 430100, China

  • 2. Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

  • Received Date: 2017-08-10
  • Rev Recd Date: 2018-02-12
  • Publish Date: 2018-03-28
    Abstract
  • The analyses of the chemical composition, stable carbon and hydrogen isotopes as well as noble gas isotopes of natural gas from the Upper Paleozoic in the Hangjinqi area of Ordos Basin showed that the natural gas was mainly composed of hydrocarbon gas, which appeared to be wet gas with a dryness coefficient from 0.80 to 0.94, lower than 0.95. The δ13 C1 and δ13 C2 values range -36. 2‰--31. 7‰ and -27. 8‰--23. 3‰, respectively, and the δDCH4 values range -199‰--172‰. The carbon and hydrogen isotopes of alkane gas are generally characterized by positive sequence, indicating for an organic origin. Gas origin identification and gas-source correlation indicated that the natural gas from the Upper Paleozoic is coal-derived gas with a normal to high maturity and was sourced from coa-measure source rocks in the Taiyuan-Shanxi formations. There are some obvious differences of gas-source to the south and the north of the Boerjianghaizi Fault. The natural gas in the Shilijiahan play in the south was derived from the P1t-P1s source rocks in situ with a high maturity, whereas the natural gas in the Shiguhao play in the north was mainly sourced from the Shilijiahan area, and then suffered a certain degree of damage and escaped.

     

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