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利用多尺度CT成像表征致密砂岩微观孔喉结构 被引量:168
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作者 白斌 朱如凯 +5 位作者 吴松涛 杨文静 Jeff Gelb Allen Gu 张响响 苏玲 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2013年第3期329-333,共5页
为全面表征致密储集层微观孔喉分布及结构特征,对鄂尔多斯盆地上三叠统延长组致密砂岩储集层样品进行纳米—微米多尺度CT三维成像研究。首先利用低分辨率微米尺度X-CT扫描获取直径为2.54 cm岩心柱内部微米级别孔喉结构特征,然后根据微... 为全面表征致密储集层微观孔喉分布及结构特征,对鄂尔多斯盆地上三叠统延长组致密砂岩储集层样品进行纳米—微米多尺度CT三维成像研究。首先利用低分辨率微米尺度X-CT扫描获取直径为2.54 cm岩心柱内部微米级别孔喉结构特征,然后根据微孔分布特征,制备多个直径为65μm的样品进行高分辨率纳米尺度扫描,重构纳米级微孔三维结构模型,最终计算出样品的孔隙度和渗透率。在微米尺度下,孔喉大小不一,直径为5.4~26.0μm,呈孤立状,局部呈条带状;在纳米尺度下,微孔直径主要为0.4~1.5μm,纳米级微孔数量增多,孔喉为管状、球状,分布于矿物颗粒(晶体)内部或表面。纳米级球状微孔连通性较差,三维空间呈孤立状,多仅作为储集空间,而纳米级短管状微孔具有一定的连通性,与微米级管状微孔和邻近孤立球状纳米微孔具有一定连通性,兼具喉道与孔隙的双重功能。数值计算样品渗透率为0.843×10 3μm2,孔隙度为10%。 展开更多
关键词 X射线CT三维成像 致密砂岩储集层 微观孔喉 纳米—微米级别
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Rapid Large Volume 3D Mineral Processing and Liberation Characterization Technique to Sub Micron Resolution
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作者 S H Lau Susan Candell +2 位作者 Sylvia Yun Allen Gu YUN Wenbing 《矿物学报》 CAS CSCD 北大核心 2013年第S1期78-78,共1页
We describe a novel lab based X-ray computed tomography system based on the architecture of X-ray Microscopes (XRM) used in synchrotron radiation facilities to be adapted for mineral processing and mineral liberation ... We describe a novel lab based X-ray computed tomography system based on the architecture of X-ray Microscopes (XRM) used in synchrotron radiation facilities to be adapted for mineral processing and mineral liberation analysis. As this is a tomographic technique performed with an XRM, it is non-destructive and does not require complex preparation of polished sections typical of SEM-EDS techniques (such as MLA and QEMSCAN). It complements these existing techniques by providing 3D information and mineral liberation of multi-phase particles with much larger sample volume statistics but at a fraction of the time. In several applications, the technique is superior. These include the characterization of tailing loss in precious minerals; the characterization of porosity, particle size distribution, crack and pore network analysis during comminution, heap leaching and for texture and exposure/lock class analysis for floatation. 展开更多
关键词 MINERAL LIBERATION analysis (MLA) 3D MINERAL processing X-ray microscopy (XRM) COMPUTED TOMOGRAPHY precious base and industrial MINERALS
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