鄂尔多斯盆地宜川—黄陵地区马家沟组流体包裹体特征及其意义

通过单偏光、荧光显微镜和显微冷热台测温观察等方法,对宜川—黄陵地区下古生界马家沟组流体包裹体进行系统研究,归纳流体包裹体岩相学、均一温度和冰点温度等特征,结合盆地热演化史分析推测储层内烃类充注史。综合分析结果显示研究区马家沟方解石内发现的沥青包裹体证明早期形成古油藏已遭受改造破坏;研究区马家沟组顶部古油藏的形成时间在早侏罗世—中侏罗世,而气藏的形成时间在早白垩世。

Characteristics and Significance of Fluid Inclusions from Majiagou Formation, Yichuan-Huangling Area, Ordos Basin

With methods such as polarizing and fluorescence microscope observation, homogeneous temperature and ice point temperature measurement and analysis of composition, a systematic study is conducted to acquire petrographic, salinity and homogenization temperature of fluid inclusions from Majiagou Formation of Yichuan-Huangling area in the Ordos basin. Finally, it can be inferredthat fluid inclusion of Majiagou Formation can be divided into two stages. The occurrence of bitumen inclusion demonstrates that paleo-oil reservoir may be once reconstructed. Besides, paleo-oil and-gas reservoir formation should be in early Jurassic-middle Jurassic and early Cretaceous respectively.