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首页> 外文期刊>Marine and Petroleum Geology >Laminae characteristics and influence on shale gas reservoir quality of lower Silurian Longmaxi Formation in the Jiaoshiba area of the Sichuan Basin, China
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Laminae characteristics and influence on shale gas reservoir quality of lower Silurian Longmaxi Formation in the Jiaoshiba area of the Sichuan Basin, China

机译：中国四川盆地嘉僵结地区下硅兰龙马溪地区石材储层质量的薄膜煤气储层质量

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摘要

Widely developed in shale strata, laminae are the most typical shale sedimentary structure. To investigate their influence on shale gas reservoir quality, we conducted complementary studies by integrating microscopic observations, geochemical analyses, field-emission scanning electron microscopy (FE-SEM) imaging, and mercury intrusion capillary pressure (MICP) techniques. The microscopic observation of thin sections enabled us to detect the laminae characteristics, including the density and maximum thickness of individual lamina, and three types and stages of lamina development were identified. The total organic carbon (TOC) content, mineral composition, natural fracture, pore type, pore size distribution, porosity, permeability, and tortuosity were investigated in these different laminae types using FE-SEM, MICP and geochemical analysis. Combining the laminae characteristics and pore structure, we concluded that the organic pores and total pore area are mainly affected by the TOC content, whereas the development of the laminae controls the inorganic macropore scale and affects the pore size distribution. In addition, we found that the excessive development of shale laminae is not conducive to organic matter accumulation because of the change in redox condition, and because it has an adverse impact on the formation of complex artificial fractures during hydraulic fracturing.
机译：Laminae广泛开发，Laminae是最典型的页岩沉积结构。为了调查它们对页岩气储层质量的影响，我们通过整合微观观测，地球化学分析，现场排放扫描电子显微镜（Fe-SEM）成像和汞侵入毛细压力（MICP）技术进行互补研究。薄剖面的微观观察使我们能够检测薄层特性，包括单个椎板的密度和最大厚度，并鉴定了三种类型和阶段的椎间膜开发阶段。使用Fe-SEM，MICP和地球化学分析，在这些不同的薄片类型中研究了总有机碳（TOC）含量，矿物成分，天然骨折，孔型，孔径分布，孔隙率，渗透性和曲折性。结合薄层的特性和孔隙结构，我们得出结论，有机孔和总孔面积主要受到TOC含量的影响，而薄层的发育控制无机大孔尺度并影响孔径分布。此外，我们发现，由于氧化还原条件的变化，Saale Laminae的过度发展不利于有机物积累，因为它对液压压裂过程中复杂人工骨折的形成具有不利影响。

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  • 来源
    《Marine and Petroleum Geology》 |2019年第2019期|共13页
  • 作者

    Wang Chao; Zhang Boqiao; Hu Qinhong; Shu Zhiguo; Sun Mengdi; Bao Hanyong;

  • 作者单位

    Jianghan Oilfield Branch Co Petr Explorat &

    Dev Res Inst Sinopec Wuhan 430223 Hubei Peoples R China;

    Jianghan Oilfield Branch Co Petr Explorat &

    Dev Res Inst Sinopec Wuhan 430223 Hubei Peoples R China;

    Univ Texas Arlington Dept Earth &

    Environm Sci Arlington TX 76019 USA;

    Jianghan Oilfield Branch Co Petr Explorat &

    Dev Res Inst Sinopec Wuhan 430223 Hubei Peoples R China;

    China Univ Geosci Key Lab Tecton &

    Petr Resources Minist Educ Wuhan 430074 Hubei Peoples R China;

    Jianghan Oilfield Branch Co Petr Explorat &

    Dev Res Inst Sinopec Wuhan 430223 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 海洋资源与开发;
  • 关键词

    Laminae; Shale gas; Reservoir quality; Longmaxi formation; Sichuan basin;

    机译：Laminae;页岩气;储层质量;龙米星形成;四川盆地;

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