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鄂尔多斯盆地陇东地区长7段有效烃源岩及生排烃研究

郭凯

郭凯. 鄂尔多斯盆地陇东地区长7段有效烃源岩及生排烃研究[J]. 石油实验地质, 2017, 39(1): 15-23. doi: 10.11781/sysydz201701015
引用本文: 郭凯. 鄂尔多斯盆地陇东地区长7段有效烃源岩及生排烃研究[J]. 石油实验地质, 2017, 39(1): 15-23. doi: 10.11781/sysydz201701015
Guo Kai. Active source rocks of Chang 7 member and hydrocarbon generation and expulsion characteristics in Longdong area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 15-23. doi: 10.11781/sysydz201701015
Citation: Guo Kai. Active source rocks of Chang 7 member and hydrocarbon generation and expulsion characteristics in Longdong area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 15-23. doi: 10.11781/sysydz201701015

鄂尔多斯盆地陇东地区长7段有效烃源岩及生排烃研究

doi: 10.11781/sysydz201701015
基金项目: 国家自然科学基金重点项目“致密砂岩微米—纳米级孔喉网络系统石油充注、运移和聚集机理”(41330319)资助。
详细信息
    作者简介:

    郭凯(1986-),男,博士,工程师,从事石油地质综合研究。E-mail:gk1228@126.com。

  • 中图分类号: TE122.1

Active source rocks of Chang 7 member and hydrocarbon generation and expulsion characteristics in Longdong area, Ordos Basin

  • 摘要: 通过烃源岩地球化学数据分析、测井有机碳计算、生烃潜力法及生排烃史模拟,研究了鄂尔多斯盆地陇东地区长7段有效烃源岩的分布、生排烃史及排烃强度。长7段有机碳含量大于1.0%的暗色泥岩(含油页岩)厚度主要为20~90 m,平均有机碳含量主要介于2%~9%,其有效烃源岩分布以w(TOC)=1.0%和Ro=0.7%为界限,具有大面积广覆式分布的特征;长7段有效烃源岩在侏罗纪末期开始成熟生烃,主要在早白垩世早期(140~130 Ma,Ro≈0.7%)开始排烃,至早白垩世末期(100 Ma)达到生排烃高峰(Ro≈1.0%),最大产油率接近400 mg/g,排油率达308 mg/g,晚白垩世以来的区域性构造抬升使得生烃停止;长7段有效烃源岩排烃强度主要分布于(10~250)×104 t/km2,具有强排烃特征,以长6—长8段致密油为主的延长组油藏主要分布于排烃强度大于20×104 t/km2的地区,油气具有近源短距离富集的特点。

     

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出版历程
  • 收稿日期:  2016-03-29
  • 修回日期:  2016-11-23
  • 刊出日期:  2017-01-28

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