新疆石油地质

新疆石油地质 ›› 2004, Vol. 25 ›› Issue (3): 259-261.

• 油气勘探 • 上一篇    下一篇

酒西坳陷天然气的地球化学特征及成因

高波1, 程克明2, 熊英2, 杨智明3   

  1. 1.中国石化石油勘探开发科学研究院,北京100083;
    2.中国石油石油勘探开发科学研究院,北京100083;
    3.中国石油玉门油田分公司勘探开发研究院，甘肃玉门735200
  • 收稿日期:2004-01-12 发布日期:2020-09-18
  • 作者简介:高波(1969-), 男,甘肃张掖人,博士,油气地质与地球化学。联系电话:010-82312974。

Geochemical Characteristics and Genetic Type of Natural Gas in Jiuxi Depression

GAO Bo1, CHENG Ke-ming2, XIONG Ying2, YANG Zhi-ming3   

  1. 1. Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China;
    2. Research Institute of PetroleumExploration and Development, PetroChina, 100083, China;
    3. Research Institute of Exploration and Development, Yumen Oilfield Company, PetroChina, Yumen, Gansu 735200, China
  • Received:2004-01-12 Published:2020-09-18

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摘要： 对酒西坳陷天然气的地球化学特征进行了较为详细的研究。研究表明,酒西坳陷的天然气组分以烃类气体为主，质量分数91.82%~99.22%,平均为96.15%.其中,甲烷质量分数68.85%~85.13%,平均为75.81%.重烃含量较高,平均质量分数20.34%,C1/C1-5为0.75~0.87,属典型的湿气;非烃气体主要为CO2 ,质量分数0.78%~8.18%,平均为3.85%.天然气的8BC;值为-45.3%o~-40.2%,平均值为-41.94%;8BC2为-31.1%o~-28.4%,平均值为-30.27%o;δ13C2为-28.6%。~-26.9%,平均值为-27.6%o,δ13C3,因此为典型的油型气。

关键词: 玉门油田, 酒西坳陷, 天然气, 成分, 碳同位素, 油型气

Abstract: The systematic research is made on the geochemical characteristics of natural gas in Jiuxi depression. The result shows thatcomposition of the gas is dominated by hydrocarbon gas which accounts for 91 .82%~99.22%, averaging 75.81%, composed of methane(68.85%~85. l3%, 75.81% in average) and heavy hydrocarbons (20.34% in average) and C1/C1-5 ratio ranges from 0.75 to 0.87, belongingto typical wet gas. The non-hydrocarbon gas is dominated by CO, accounting for 0.78%~8.18%, averaging 3.85%. The δ13C1value rangesfrom-45.3%o to-40.2%o, δ13C2 value from-31. 1%o to-28.4%.(-30.27%0 in average) andδ13C2value from-28.6%o to-26.9%o (-27.6%o inaverage), i.e.δ13C3, which belongs to the ty pical petroliferous gas.

Key words: Yumen field, Jiuxi depression, natural gas, composition, carbon isotope, petroliferous gas

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