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地球学报  2009 

鄂尔多斯盆地延长矿区延长组流体包裹体特征

DOI: 10.3975/cagsb.2009.02.09

Keywords: 流体包裹体,均一化温度,油气成藏,成藏期次,延长组,延长矿区

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Abstract:

流体包裹体在划分油气运移充注期次、确定油气藏形成时间等方面均有重要的应用价值。笔者通过镜下观察流体包裹体的发育产状,划分其类型,描述其特征,并与成岩作用相结合来确定包裹体形成期次。通过对与烃类共生的盐水包裹体进行均一化温度测试,结合其他相关地质资料,认为延长矿区延长组流体包裹体的均一温度集中分布在105~125℃范围内,且包裹体均一温度有随埋深增加而增高趋势。对比研究区埋藏史、地热史分析得出,延长矿区至少存在一期主要的油气成藏期次,发生在距今100~110Ma,即早白垩世晚期,为该区主要的油气成藏期。

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