Genetic type and source of natural gas in the southern margin of Junggar Basin, NW China

被引：0
作者：
Chen J. [1 ,2 ,3 ]
Wang X. [4 ]
Ni Y. [1 ,2 ,3 ]
Xiang B. [4 ]
Liao F. [1 ,2 ,3 ]
Liao J. [4 ]
Zhao C. [1 ]
机构：
[1] Research Institute of Petroleum Exploration and Development, PetroChina, Beijing
[2] State Key Laboratory of Enhanced Oil Recovery, Beijing
[3] Key Laboratory of Petroleum Geochemistry of CNPC, Beijing
[4] PetroChina Xinjiang Oilfield Company, Karamay
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2019年 / 46卷 / 03期
关键词：
Carbon isotope; Coal measures; Gas source identification; Hydrogen isotope; Jurassic; Natural gas; Natural gas genetic type; Southern Junggar Basin;
D O I：
10.11698/PED.2019.03.05
中图分类号：
学科分类号：
摘要：
Natural gas has been discovered in many anticlines in the southern margin of the Junggar Basin. However, the geochemical characteristics of natural gas in different anticlines haven't been compared systematically, particularly, the type and source of natural gas discovered recently in Well Gaotan-1 at the Gaoquan anticline remain unclear. The gas composition characteristics and carbon and hydrogen isotope compositions in different anticlines were compared and sorted systematically to identify genetic types and source of the natural gas. The results show that most of the gas samples are wet gas, and a few are dry gas; the gas samples from the western and middle parts have relatively heavier carbon isotope composition and lighter hydrogen isotope composition, while the gas samples from the eastern part have lighter carbon and hydrogen isotope compositions. The natural gas in the southern margin is thermogenic gas generated by freshwater-brackish water sedimentary organic matter, which can be divided into three types, coal-type gas, mixed-type gas and oil-type gas, in which coal-type gas and mixed-type gas take dominance. The Jurassic coal measure is the main natural gas source rock in the southern margin, and the Permian lacustrine and the Upper Triassic lacustrine-limnetic facies source rocks are also important natural gas source rocks. The natural gas in the western part of the southern margin is derived from the Jurassic coal measure and the Permian lacustrine source rock, while the natural gas in the middle part of the southern margin mainly come from the Jurassic coal measure, partly from the Permian and/or the Upper Triassic source rocks, and the natural gas in the eastern part of the southern margin is originated from the Permian lacustrine source rock. The natural gas in the Qingshuihe oil and gas reservoir of Well Gaotan-1 is a mixture of coal-type gas and oil-type gas, of which the Jurassic and Permian source rocks contribute about half each. © 2019, The Editorial Board of Petroleum Exploration and Development. All right reserved.
引用
收藏
页码：461 / 473
页数：12
相关论文
共 54 条
  • [1] Wang X., Zhi D., Wang Y., Et al., Geochemistry of Source Rock and Petroleum in the Junggar Basin, (2013)
  • [2] Chen J., Wang X., Deng C., Et al., Geochemical features of source rocks in the southern margin, Junggar Basin, Northwestern China, Acta Petrolei Sinica, 36, 7, pp. 767-780, (2015)
  • [3] Chen J., Wang X., Deng C., Et al., Geochemical features and classification of crude oil in the southern margin of Junggar Basin, Northwestern China, Acta Petrolei Sinica, 36, 11, pp. 1315-1331, (2015)
  • [4] Chen J., Wang X., Deng C., Et al., Investigation of typical reservoirs and occurrence regularity of crude oil in the southern margin of Junggar Basin, Northwestern China, Acta Petrolei Sinica, 37, 4, pp. 415-429, (2016)
  • [5] Chen J., Wang X., Deng C., Et al., Source of condensate oil in the middle of southern margin, Junggar Basin, NW China, Petroleum Exploration and Development, 43, 5, pp. 830-840, (2016)
  • [6] Chen J., Wang X., Deng C., Et al., Geochemical features of source rock and crude oil in the Junggar Basin, Northwest China, Acta Geologica Sinica, 90, 1, pp. 37-67, (2016)
  • [7] Chen J., Wang X., Deng C., Et al., Oil and gas source, occurrence and petroleum system in the Junggar Basin, Northwest China, Acta Geologica Sinica, 90, 3, pp. 421-450, (2016)
  • [8] Du J., Zhi D., Li J., Et al., Major breakthrough of Well Gaotan 1 and exploration prospects of lower assemblage in southern margin of Junggar Basin, NW China, Petroleum Exploration and Development, 46, 2, pp. 205-215, (2019)
  • [9] He D., Zhang Y., Wang X., Et al., Plays for giant oil field in Junggar Basin, Xinjiang Petroleum Geology, 25, 2, pp. 117-121, (2004)
  • [10] Kuang J., Qi X., The structural characteristics and oil-gas explorative direction in Junggar foreland basin, Xinjiang Petroleum Geology, 27, 1, pp. 5-9, (2006)
123456