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中扬子宜昌地区寒武系水井沱组页岩含气性及影响因素

罗胜元 刘安 李海 陈孝红 张淼

罗胜元, 刘安, 李海, 陈孝红, 张淼. 中扬子宜昌地区寒武系水井沱组页岩含气性及影响因素[J]. 石油实验地质, 2019, 41(1): 56-67. doi: 10.11781/sysydz201901056
引用本文: 罗胜元, 刘安, 李海, 陈孝红, 张淼. 中扬子宜昌地区寒武系水井沱组页岩含气性及影响因素[J]. 石油实验地质, 2019, 41(1): 56-67. doi: 10.11781/sysydz201901056
LUO Shengyuan, LIU An, LI Hai, CHEN Xiaohong, ZHANG Miao. Gas-bearing characteristics and controls of the Cambrian Shuijingtuo Formation in Yichang area, Middle Yangtze region[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(1): 56-67. doi: 10.11781/sysydz201901056
Citation: LUO Shengyuan, LIU An, LI Hai, CHEN Xiaohong, ZHANG Miao. Gas-bearing characteristics and controls of the Cambrian Shuijingtuo Formation in Yichang area, Middle Yangtze region[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(1): 56-67. doi: 10.11781/sysydz201901056

中扬子宜昌地区寒武系水井沱组页岩含气性及影响因素

doi: 10.11781/sysydz201901056
基金项目: 

国家科技重大专项“中扬子高演化页岩气赋存机理与富集规律研究”(2016ZX05034001-002)及中国地质调查局“宜昌斜坡页岩气有利区战略调查”(DD20179615)联合资助。

详细信息
    作者简介:

    罗胜元(1986-),男,博士,工程师,从事页岩气、油气地质调查与研究。E-mail:loshyv@163.com。

  • 中图分类号: TE132.2

Gas-bearing characteristics and controls of the Cambrian Shuijingtuo Formation in Yichang area, Middle Yangtze region

  • 摘要: 中扬子宜昌地区作为南方海相页岩气勘探的有利目标区之一,多口井于寒武系水井沱组页岩中见页岩气显示,但含气性差异较大。基于区域地质背景与页岩气钻井资料,结合现场解析含气量测试数据,描述了宜昌地区水井沱组页岩气纵向分布特征,探讨了页岩气含量的主要影响因素。该区水井沱组黑色岩系主要为碳质页岩和灰质页岩,厚50~140 m,有机碳含量高,以Ⅰ型为主,处于过成熟热演化阶段,具良好的生烃潜力;现场解析含气量为0.32~5.48 m3/t,含气量大于2 m3/t的页岩累计厚度达到44.05 m,反映该区页岩具较好的整体含气性。水井沱组页岩含气性受沉积相带、有机碳含量、矿物组分、孔隙度、裂缝发育程度、地层压力等多种因素影响。陆棚相沉积的黑色碳质页岩含气量高于斜坡相灰色钙质页岩,而局限台地相泥灰岩含气量最低;含气量与页岩中有机碳含量、石英矿物含量均呈较好的正相关性,与碳酸盐矿物含量呈弱的负相关性,与黏土矿物含量关系不大,而有机碳含量对含气量的控制作用更为显著;页岩孔隙度大小和孔隙分布差异是导致含气量差异的重要因素,此外页岩含气量还与储层裂缝发育程度和地层压力密切相关。

     

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  • 收稿日期:  2018-09-19
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