天然气地球科学 ›› 2020, Vol. 31 ›› Issue (11): 1585–1592.doi: 10.11764/j.issn.1672-1926.2020.03.014

• 非常规天然气 • 上一篇    下一篇

柴达木盆地东坪氦工业气田发现及氦气来源和勘探前景

张晓宝1,2,3(),周飞3,曹占元1,2,3,梁明亮4   

  1. 1.中国科学院西北生态环境资源研究院油气资源研究中心,甘肃 兰州 730000
    2.甘肃省油气资源研究重点实验室,甘肃 兰州 730000
    3.中国石油青海油田分公司,甘肃 敦煌 736202
    4.中国地质科学院地质力学研究所,北京 100081
  • 收稿日期:2020-02-17 修回日期:2020-03-23 出版日期:2020-11-10 发布日期:2020-11-24
  • 作者简介:张晓宝(1958-),男,甘肃兰州人,研究员,博士,主要从事天然气地球化学研究.E-mail: 1958zxb1960bfx@lzb.ac.cn.
  • 基金资助:
    国家自然科学基金面上项目“氦气藏与气源岩气体、元素地球化学与矿物学相关性与气源追索——以柴达木盆地东坪气田为例”(41972135);国家自然科学基金青年项目“天然气N2组成地球化学示踪指标研究——以柴达木盆地为例”(41702150)

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

摘要:

为进一步明确柴达木盆地氦气资源分布情况,对东坪等气田天然气地球化学特征进行分析。结果表明:东坪气田东坪1井区、东坪3井区和尖顶山气田尖探1井区等21个天然气样中氦气含量大于0.05%,达到了工业标准,其中最小值为0.075%,最大值为1.069%,平均值为0.386%,据此在柴达木盆地首次发现了东坪氦工业气田。东坪气田及其附近的牛东气田3He/4He最小值为1.01×10-8,最大值为3.62×10-8,平均值为1.86×10-8,均位于10-8量级,应属壳源氦。综合分析认为东坪、尖顶山等气田已发现氦工业气藏的氦主要来源于花岗岩或花岗片麻岩基底。柴达木盆地花岗岩与花岗片麻岩基底分布广泛,具备形成高含氦天然气的条件,氦资源勘探前景十分广阔。

关键词: 氦工业气藏, 壳源, 花岗岩基岩, 东坪气田, 柴达木盆地

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)

中图分类号: 

  • TE122.1
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