岩矿测试2025，Vol.44Issue(2)：245-253,9.DOI:10.15898/j.ykcs.202404040075
利用原子力显微镜研究致密砂岩储层黏土矿物形貌特征
The Morphological Characteristics of Clay Minerals in a Tight Sandstone Reservoir by Atomic Force Microscopy
摘要
Abstract
Clay minerals,as one of the main components of unconventional oil and gas reservoirs,have significant implications for the evaluation of unconventional oil and gas reservoirs in terms of their fine characterization of nano/sub-nano morphological features.By using atomic force microscopy(AFM)micro-area analysis technology,the problem of secondary modification of nano-pore structure caused by the conductive film in the pretreatment process of electron microscopy was solved;it made up for the defect that electron microscopy requires the sample to be conductive and can directly observe the morphological characteristics of the sample.Here,it was observed through AFM,that in the late diagenetic stage of the tight sandstone of the Xujiahe Formation in western Sichuan,some clay minerals developed parallel stepped stripes,with a large number of nano-pores formed at the concave angles on both sides of the steps,which were the main components of inorganic pores.Secondly,clay minerals had the same diagenetic evolution sequence,but their crystal morphologies were different,indicating that there was a spatial coupling relationship between their morphological features and diagenesis.The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202404040075.关键词
原子力显微镜/致密砂岩/伊蒙混层黏土/绿泥石/伊利石/生长阶梯/川西须家河组Key words
atomic force microscopy/tight sandstone/illite-smectite mixed-layer clay minerals/chlorite/illite/growth ladder/Xujiahe Formation in western Sichuan分类
地质学引用本文复制引用
王坤阳,杜谷,王冠,何佳乐..利用原子力显微镜研究致密砂岩储层黏土矿物形貌特征[J].岩矿测试,2025,44(2):245-253,9.基金项目
国家自然基金青年科学基金项目"华南奥陶—志留纪之交氮循环及古海洋启示"(42102142) （42102142）
