吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (6): 1637-1648.doi: 10.13278/j.cnki.jjuese.201606104
赵彦德1,2, 齐亚林1,2, 罗安湘1,2, 程党性1,2, 李继宏1,2, 黄锦绣1,2
Zhao Yande1,2, Qi Yalin1,2, Luo Anxiang1,2, Cheng Dangxing1,2, Li Jihong1,2, Huang Jinxiu1,2
摘要: 中生界侏罗系是鄂尔多斯盆地重要的石油勘探与开发目的层之一,侏罗系油藏受前侏罗纪古地貌影响较为显著。本文通过流体包裹体特征分析、均一化温度测定和包裹体丰度(GOI)分析、定量颗粒荧光(QGF、QGF-E)研究以及储集层自生伊利石K-Ar定年等实验方法和手段的应用,对鄂尔多斯盆地侏罗系油气包裹体特征进行了精细描述及定量化分析研究,揭示了侏罗系油藏形成时间、充注过程及油气包裹体与油气运移、成藏的关系。研究结果表明:侏罗系油藏存在晚期充注,早期充注少或油藏遭受调整,早期生成的烃类现今仅以沥青的形式赋存,现今烃类流体主要为晚期成藏的产物。侏罗系石油大规模充注期为(108.3±2.0)~(116.5±2.0)Ma(早白垩世中期),具有垂向运移聚集的特点。鄂尔多斯盆地侏罗系油藏早期受岩性和构造双重控制,晚期构造活动调整了油气藏的形态及局部富集。侏罗系在晚期成藏过程中没有形成过叠合连片的大规模的油藏,只在局部构造上形成规模较小的“小而肥”的独立油藏。
中图分类号:
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