Quantifying the anisotropy and tortuosity of permeable pathways in clay-rich mudstones using models based on X-ray tomography.
Quantifying the anisotropy and tortuosity of permeable pathways in clay-rich mudstones using models based on X-ray tomography.
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DOI：
10.1038/s41598-017-14810-1
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发表时间：
2017-11-01
影响因子：
4.6
通讯作者：
Striolo A
中科院分区：
文献类型：
--
作者：
Backeberg NR;Iacoviello F;Rittner M;Mitchell TM;Jones AP;Day R;Wheeler J;Shearing PR;Vermeesch P;Striolo A
页岩的渗透性很重要，因为它控制着石油和天然气资源可以迁移到哪里，以及碳氢化合物最终储存在地球的哪里。页岩具有众所周知的各向异性定向渗透性，其继承自沉积纹层的沉积分层，其中最高渗透性平行于纹层测量，最低渗透性垂直于纹层。我们将联合收割机最先进的实验室渗透率实验与高分辨率X射线计算机断层扫描相结合，并首次能够量化通过岩石的三维互连路径，这些路径定义了页岩的各向异性行为。实验记录了渗透率的一到两个数量级的物理各向异性。二维和三维分析的微米和纳米级的X射线计算机断层扫描照亮了通过页岩中的多孔/可渗透相的相互连接的途径。的曲折因子量化的明显减少扩散运输导致通过多孔介质的流动路径的回旋，并预测方向各向异性从根本上控制的散装岩石矿物的几何形状。了解矿物尺度对渗透率的控制将有助于更好地估计全球页岩气区块的可采储量范围。
The permeability of shales is important, because it controls where oil and gas resources can migrate to and where in the Earth hydrocarbons are ultimately stored. Shales have a well-known anisotropic directional permeability that is inherited from the depositional layering of sedimentary laminations, where the highest permeability is measured parallel to laminations and the lowest permeability is perpendicular to laminations. We combine state of the art laboratory permeability experiments with high-resolution X-ray computed tomography and for the first time can quantify the three-dimensional interconnected pathways through a rock that define the anisotropic behaviour of shales. Experiments record a physical anisotropy in permeability of one to two orders of magnitude. Two- and three-dimensional analyses of micro- and nano-scale X-ray computed tomography illuminate the interconnected pathways through the porous/permeable phases in shales. The tortuosity factor quantifies the apparent decrease in diffusive transport resulting from convolutions of the flow paths through porous media and predicts that the directional anisotropy is fundamentally controlled by the bulk rock mineral geometry. Understanding the mineral-scale control on permeability will allow for better estimations of the extent of recoverable reserves in shale gas plays globally.
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影响因子：
2
作者：
Bailey JJ;Heenan TMM;Finegan DP;Lu X;Daemi SR;Iacoviello F;Backeberg NR;Taiwo OO;Brett DJL;Atkinson A;Shearing PR
通讯作者：
Shearing PR
DOI：
10.1029/jb095ib06p09035
发表时间：
1990-06-10
期刊：
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS
影响因子：
--
作者：
ARCH, J;MALTMAN, A
通讯作者：
MALTMAN, A
影响因子：
2.7
作者：
Berg, Carl Fredrik
通讯作者：
Berg, Carl Fredrik
影响因子：
5.2
作者：
Costa, A
通讯作者：
Costa, A
使用晶格玻尔兹曼方法进行页岩输运特性的纳米级模拟：渗透率和扩散率
影响因子：
4.6
作者：
Chen L;Zhang L;Kang Q;Viswanathan HS;Yao J;Tao W
通讯作者：
Tao W