...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >An analytical model to couple gas storage and transport capacity in organic matter with noncircular pores
【24h】

An analytical model to couple gas storage and transport capacity in organic matter with noncircular pores

机译：一种分析模型，以耦合有机质储气和血管孔的运输能力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Scanning Electro Microscope (SEM) images illustrate the variety of possible pore shape in organic matter of shale reservoirs. The size of the pores with different geometries is at nanoscale (10-100 s nm), hence the ratio of wetted surface area to the volume of pores (specific surface area, SSA) is high. For the systems with high SSA the collisions between gas molecules and pore walls become significant, therefore, fluid flow is not dominantly controlled by the bulk flow, i.e., fluid-wall surface interaction becomes important. Most shale permeability models assume circular nanopores that results in poor prediction of permeability. We present a novel analytical apparent porosity and permeability model to model gas storage and permeability in shale gas reservoirs with noncircular nanopores. The SSA and the aspect ratio of height to the width of noncircular nanopores, were both used in our model to couple gas storage and transport capacity. We validated our model with permeability values calculated from pore network simulations of five shale samples from Jianghan Basin of China. The results showed that sharp edges in nanopores could dramatically affect permeability. For examples, the noncircularity deviation of gas flow in a rectangular nanopore is more than an equivalent nanopore with elliptical cross-section. The assumption of circular cross-section nanopores in estimating apparent porosity and permeability could impose up to 55% error depending on the pore geometry.
机译：扫描电子显微镜（SEM）图像说明了页岩储层的有机物质中可能的孔隙形状。具有不同几何形状的孔的尺寸是纳米级（10-100 s nm），因此湿润的表面积与孔的体积（比表面积，SSA）的比率高。对于具有高SSA的系统，气体分子和孔壁之间的碰撞变得显着，因此，流体流量不受散装流动的主导，即流体壁表面相互作用变得重要。大多数页岩渗透性模型假设圆形纳米孔导致渗透性不良。我们提出了一种新的分析表观孔隙率和渗透性模型，以模拟含有非圆形纳米孔的页岩气藏的储气和渗透性。 SSA和高度的宽高比与非晕纳米孔的宽度，两者都用于耦合储气和运输能力。我们通过来自中国江汉盆地的五页页岩样本的孔隙网络模拟计算的渗透率值验证了我们的模型。结果表明，纳米孔中的尖锐边缘可能会显着影响渗透性。例如，矩形纳米孔中气流的非晕性偏差大于具有椭圆形横截面的等效纳米孔。循环横截面纳米孔估算表观孔隙率和渗透性的假设可以根据孔几何形状施加高达55％的误差。

著录项

  • 来源
    《Fuel》 |2020年第may15期|117288.1-117288.13|共13页
  • 作者

    Sheng Guanglong; Zhao Hui; Su Yuliang; Javadpour Farzam; Wang Chenchen; Zhou Yuhui; Liu Jinghua; Wang Hui;

  • 作者单位

    Yangtze Univ Sch Petr Engn Wuhan 430100 Peoples R China|Univ Texas Austin Jackson Sch Geosci Bur Econ Geol Austin TX 78713 USA;

    Yangtze Univ Sch Petr Engn Wuhan 430100 Peoples R China;

    China Univ Petr East China Sch Petr Engn Qingdao 266580 Peoples R China;

    Univ Texas Austin Jackson Sch Geosci Bur Econ Geol Austin TX 78713 USA;

    Yangtze Univ Hubei Cooperat Innovat Ctr Unconvent Oil & Gas Wuhan 430100 Peoples R China;

    Yangtze Univ Sch Petr Engn Wuhan 430100 Peoples R China;

    Yangtze Univ Sch Petr Engn Wuhan 430100 Peoples R China;

    PetroChina Xinjiang Oilfield Co Oil Prod Plant 2 Karamay 833600 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Organic matter; Multi-geometry shape; Specific surface area; Aspect ratio; Apparent porosity; Apparent permeability;

    机译：有机物;多几何形状;比表面积;纵横比;表观孔隙度;表观渗透率;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号