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致密砂岩气藏油气轻烃特征及其地质意义——以四川盆地西北部须家河组气藏为例

王玮 沈忠民 裴森奇 戴鸿鸣 黄东

王玮, 沈忠民, 裴森奇, 戴鸿鸣, 黄东. 致密砂岩气藏油气轻烃特征及其地质意义——以四川盆地西北部须家河组气藏为例[J]. 石油实验地质, 2018, 40(6): 818-827. doi: 10.11781/sysydz201806818
引用本文: 王玮, 沈忠民, 裴森奇, 戴鸿鸣, 黄东. 致密砂岩气藏油气轻烃特征及其地质意义——以四川盆地西北部须家河组气藏为例[J]. 石油实验地质, 2018, 40(6): 818-827. doi: 10.11781/sysydz201806818
WANG Wei, SHEN Zhongmin, PEI Senqi, DAI Hongming, HUANG Dong. Light hydrocarbon characteristics of petroleum in a tight sandstone gas reservoir and its geological significance: a case study of the Upper Triassic Xujiahe Formation gas reservoir in the northwestern Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(6): 818-827. doi: 10.11781/sysydz201806818
Citation: WANG Wei, SHEN Zhongmin, PEI Senqi, DAI Hongming, HUANG Dong. Light hydrocarbon characteristics of petroleum in a tight sandstone gas reservoir and its geological significance: a case study of the Upper Triassic Xujiahe Formation gas reservoir in the northwestern Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(6): 818-827. doi: 10.11781/sysydz201806818

致密砂岩气藏油气轻烃特征及其地质意义——以四川盆地西北部须家河组气藏为例

doi: 10.11781/sysydz201806818
基金项目: 

国家科技重大专项(2016ZX05047-002-05)和中国石油西南油气田公司科技重大专项(2013ZD01)资助。

详细信息
    作者简介:

    王玮(1985-),男,博士研究生,从事油气地球化学研究。E-mail:13881819221@163.com。

  • 中图分类号: TE122.11

Light hydrocarbon characteristics of petroleum in a tight sandstone gas reservoir and its geological significance: a case study of the Upper Triassic Xujiahe Formation gas reservoir in the northwestern Sichuan Basin

  • 摘要: 四川盆地西北部上三叠统须家河组天然气、凝析油样品的C7及C5-C7轻烃分布显示出油气主要来源于富含腐殖型干酪根的煤系泥岩与煤岩,该区油气样品的K1值平均为1.04,整体相关性较好;K2值差异较大,相关系数也较低,母体-子体比值梓潼凹陷须家河组呈现出较强的离散型。利用庚烷值、异庚烷值及MANGO稳态催化动力学等方法计算表明,天然气处于成熟-高成熟演化阶段,明显低于该区烃源岩实测成熟度及天然气δ13C1值计算的成熟度。梓潼凹陷须家河组凝析油及天然气轻烃星状指纹图分析显示,同一构造不同层位、同一层位不同构造油气可对比性较差,表明该区油气藏内部砂体之间的连通性较差,油气成藏以近源短距离运聚为主。由于该区储层早期已达致密演化阶段,从而导致在封闭-半封闭的地质环境中,天然气受不同热演化阶段天然气的累积效应影响,而凝析油受到同源不同期的天然气多次气侵而产生“蒸发分馏”效应影响,导致部分轻烃参数在应用过程中出现偏差。

     

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  • 收稿日期:  2018-04-08
  • 修回日期:  2018-10-17
  • 刊出日期:  2018-11-28

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