Hierarchical integration of porosity in shales.
Hierarchical integration of porosity in shales.
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DOI：
10.1038/s41598-018-30153-x
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发表时间：
2018-08-03
影响因子：
4.6
通讯作者：
Lee PD
中科院分区：
文献类型：
--
作者：
Ma L;Slater T;Dowey PJ;Yue S;Rutter EH;Taylor KG;Lee PD
由于存在广泛的孔隙尺寸和类型，页岩的孔隙表征具有挑战性。Haynesville-Bossier页岩（美国）作为典型的含粘土硅质、富含有机物、天然气成熟页岩取样，其特征在于孔径范围为2 nm至3000 nm。相关地利用了三种先进的成像技术，包括Ga+等离子体聚焦离子束扫描电子显微镜（等离子体FIB或PFIB）的应用，由Ga+ FIB方法补充，该方法现在经常用于检查孔隙率和有机/无机相，以及纳米级孔的透射电子显微镜断层扫描（体素尺寸0.6 nm;分辨率1-2 nm）。这三种孔径尺度对孔隙网络的贡献各不相同。那些<10 nm（最大数量），10 nm至100 nm（最佳连接，因此控制传输特性），和>100 nm（最大总体积，因此决定流体储存性）。孔隙类型主要有有机质内孔隙、有机-矿物界面孔隙、矿物间孔隙和矿物内孔隙四种，并具有各自的几何特征。整个孔隙网络包括页硅酸盐矿物颗粒之间的全局连接系统（直径：6-50 nm）和多孔有机物质内的局部聚集连接孔隙（直径：200-800 nm）。综合预测孔隙几何形状，连通性，并在控制岩石物理性质的作用进行了验证，通过实验渗透率测量。
Pore characterization in shales is challenging owing to the wide range of pore sizes and types present. Haynesville-Bossier shale (USA) was sampled as a typical clay-bearing siliceous, organic-rich, gas-mature shale and characterized over pore diameters ranging 2 nm to 3000 nm. Three advanced imaging techniques were utilized correlatively, including the application of Xe+ plasma focused ion beam scanning electron microscopy (plasma FIB or PFIB), complemented by the Ga+ FIB method which is now frequently used to characterise porosity and organic/inorganic phases, together with transmission electron microscope tomography of the nano-scale pores (voxel size 0.6 nm; resolution 1–2 nm). The three pore-size scales each contribute differently to the pore network. Those <10 nm (greatest number), 10 nm to 100 nm (best-connected hence controls transport properties), and >100 nm (greatest total volume hence determines fluid storativity). Four distinct pore types were found: intra-organic, organic-mineral interface, inter-mineral and intra-mineral pores were recognized, with characteristic geometries. The whole pore network comprises a globally-connected system between phyllosilicate mineral grains (diameter: 6–50 nm), and locally-clustered connected pores within porous organic matter (diameter: 200–800 nm). Integrated predictions of pore geometry, connectivity, and roles in controlling petrophysical properties were verified through experimental permeability measurements.
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影响因子：
4.6
作者：
Burnett TL;McDonald SA;Gholinia A;Geurts R;Janus M;Slater T;Haigh SJ;Ornek C;Almuaili F;Engelberg DL;Thompson GE;Withers PJ
通讯作者：
Withers PJ
影响因子：
3.5
作者：
Curtis, Mark E.;Sondergeld, Carl H.;Rai, Chandra S.
通讯作者：
Rai, Chandra S.
影响因子：
5.2
作者：
Gaboreau, Stephane;Robinet, Jean-Charles;Pret, Dimitri
通讯作者：
Pret, Dimitri
影响因子：
2.2
作者：
Burnett, T. L.;Kelley, R.;Withers, P. J.
通讯作者：
Withers, P. J.
影响因子：
7.4
作者：
Clarkson, C. R.;Solano, N.;Blach, T. P.
通讯作者：
Blach, T. P.