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桑植-石门复向斜及邻区古流体特征与油气保存意义

刘安 危凯 李旭兵 王保忠 王强

刘安, 危凯, 李旭兵, 王保忠, 王强. 桑植-石门复向斜及邻区古流体特征与油气保存意义[J]. 石油实验地质, 2015, 37(6): 742-750. doi: 10.11781/sysydz201506742
引用本文: 刘安, 危凯, 李旭兵, 王保忠, 王强. 桑植-石门复向斜及邻区古流体特征与油气保存意义[J]. 石油实验地质, 2015, 37(6): 742-750. doi: 10.11781/sysydz201506742
Liu An, Wei Kai, Li Xubing, Wang Baozhong, Wang Qiang. Paleo-fluid characteristics and preservation of hydrocarbons in the Sangzhi-Shimen synclinorium and adjacent areas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(6): 742-750. doi: 10.11781/sysydz201506742
Citation: Liu An, Wei Kai, Li Xubing, Wang Baozhong, Wang Qiang. Paleo-fluid characteristics and preservation of hydrocarbons in the Sangzhi-Shimen synclinorium and adjacent areas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(6): 742-750. doi: 10.11781/sysydz201506742

桑植-石门复向斜及邻区古流体特征与油气保存意义

doi: 10.11781/sysydz201506742
基金项目: 中国地质调查局项目"武陵-湘鄂西页岩气资源调查评价"(12120114049801)、"桑植-石门及邻区油气地质综合调查研究"(1212011220745)资助。
详细信息
    作者简介:

    刘安(1981—),男,硕士,工程师,从事石油地质调查研究。E-mail:globstar@163.com

  • 中图分类号: TE122.2

Paleo-fluid characteristics and preservation of hydrocarbons in the Sangzhi-Shimen synclinorium and adjacent areas

  • 摘要: 通过对桑植-石门复向斜及相邻地区震旦系-三叠系方解石脉和围岩的碳氧同位素、锶同位素对比,结合方解石脉中流体包裹体测试分析,研究了桑植-石门地区古流体特征及其油气保存意义。下古生界围岩87Sr/86Sr部分高于同期海水,也高于方解石脉,表明围岩在裂隙形成之前受到高87Sr/86Sr流体改造。桑植-石门复向斜北翼温泉附近的方解石脉体具高87Sr/86Sr、低δ13C、低δ18O特征,显示大气水参与了方解石脉沉淀,逆断层可能在形成之初就不具封闭性。流体包裹体盐度和均一温度指示,桑植-石门地区上寒武统娄山关组上覆盖层残余厚度小于3 km,不具封闭能力;中寒武统孔王溪组方解石脉流体包裹体高盐度表明膏盐盖层在研究区广泛分布,在埋深超过2 km条件下对下伏地层具有较好的封盖能力。桑植-石门复向斜田二垭、向家垭、车坊背斜圈闭、桥头、中坪隐伏圈闭保存条件较好,除田二垭背斜外,可以同时将震旦系灯影组、寒武系清虚洞组白云岩作为勘探目的层。

     

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  • 收稿日期:  2014-08-29
  • 修回日期:  2015-09-08
  • 刊出日期:  2015-11-28

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