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下扬子地区中上二叠统页岩有机孔发育特征

曹涛涛 邓模 罗厚勇 刘虎 刘光祥 HURSTHOUSE Andrew Stefan

曹涛涛, 邓模, 罗厚勇, 刘虎, 刘光祥, HURSTHOUSE Andrew Stefan. 下扬子地区中上二叠统页岩有机孔发育特征[J]. 石油实验地质, 2018, 40(3): 315-322. doi: 10.11781/sysydz201803315
引用本文: 曹涛涛, 邓模, 罗厚勇, 刘虎, 刘光祥, HURSTHOUSE Andrew Stefan. 下扬子地区中上二叠统页岩有机孔发育特征[J]. 石油实验地质, 2018, 40(3): 315-322. doi: 10.11781/sysydz201803315
CAO Taotao, DENG Mo, LUO Houyong, LIU Hu, LIU Guangxiang, HURSTHOUSE Andrew Stefan. Characteristics of organic pores in Middle and Upper Permian shale in the Lower Yangtze region[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(3): 315-322. doi: 10.11781/sysydz201803315
Citation: CAO Taotao, DENG Mo, LUO Houyong, LIU Hu, LIU Guangxiang, HURSTHOUSE Andrew Stefan. Characteristics of organic pores in Middle and Upper Permian shale in the Lower Yangtze region[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(3): 315-322. doi: 10.11781/sysydz201803315

下扬子地区中上二叠统页岩有机孔发育特征

doi: 10.11781/sysydz201803315
基金项目: 国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(2016ZX05061)和国家自然科学基金“页岩解析气碳同位素分馏特征及其指示意义”(41503033)联合资助。
详细信息
    作者简介:

    曹涛涛(1987-),男,博士,讲师,从事页岩气地质研究工作。E-mail:515165359@163.com。

  • 中图分类号: TE122.2

Characteristics of organic pores in Middle and Upper Permian shale in the Lower Yangtze region

  • 摘要: 下扬子地区中上二叠统发育一套海陆过渡相页岩,其显微组成与海相页岩存在明显的差异,为了研究该套页岩有机孔的发育特征及影响因素,开展了有机岩石学、扫描电镜、氩离子抛光扫描电镜、气测孔隙度和压汞等相关分析。研究表明,中上二叠统页岩中有机孔整体发育较好,但不同有机质组分中孔隙的发育存在明显的差别,具体表现为镜质体内孔隙发育差,固体沥青内发育少量孤立的孔隙,腐泥质内具有丰富的孔隙。黄铁矿或黏土矿物常与有机质形成有机/矿物复合体,复合体内有机孔普遍发育较好,可能与黄铁矿或黏土矿物促进有机质生烃和分解有关。中上二叠统页岩TOC含量与比表面积之间存在明显的线性正相关性,但与孔隙度之间具有复杂的关系,当w(TOC)<6.16%时,孔隙度随TOC含量的增加而增加,而当w(TOC)>6.16%时,孔隙度普遍较低且与TOC含量之间存在微弱的负相关性。孔径分布特征也揭示高TOC页岩的中—大孔体积明显低于低TOC页岩。页岩孔隙结构发育特征表明,TOC含量越高、固体沥青组分以及贫氢组分的含量越高,这些组分占据的矿物孔隙越多,降低了页岩总的孔隙空间,且TOC含量越高,页岩越易被压实,造成中大孔塌陷,进一步降低了页岩的孔隙度。

     

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  • 收稿日期:  2017-08-30
  • 修回日期:  2018-03-19
  • 刊出日期:  2018-05-28

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