特种油气藏2026，Vol.33Issue(4)：32-37,6.DOI:10.3969/j.issn.1006-6535.2026.04.005
样品粉碎粒度对小角X-射线散射表征页岩孔隙结构的影响
Effect of sample crushing size on characterization of shale pore structure by small-angle X-ray scattering
摘要
Abstract
At present,the influence of sample crushing size on the characterization of shale pore structure by small-angle X-ray scattering remains unclear.To solve this problem,shale samples from the Longmaxi Formation in the Sichuan Basin were selected as the research objects.The samples were crushed into four commonly used particle sizes.Small-angle X-ray scattering(SAXS)experiments were then carried out to characterize closed pores,and low-pressure nitrogen adsorption ex-periments were performed to characterize open pores.The experimental results show that,with decreasing sample particle size,both pore volume and fractal dimen-sion decrease correspondingly.This indicates that sample crushing damages pores,especially larger closed pores,thereby reducing the heterogeneity and surface com-plexity of the sample pore system.Therefore,in order to obtain true information on shale pore structure,20-mesh samples from the Longmaxi Formation in the Si-chuan Basin are recommended for small-angle X-ray scattering experiments.The results of this study will promote the standardization of small-angle X-ray scatter-ing for shale and the comparability of the results obtained.关键词
粉碎粒径/孔隙结构/小角X-射线散射/低压氮气吸附/页岩Key words
crushing particle size/pore structure/small-angle X-ray scattering/low-pressure nitrogen adsorption/shale分类
能源科技引用本文复制引用
王江,韩辉,文冉,聂尊浩,武文杰,王逸兴,何春臣,何江..样品粉碎粒度对小角X-射线散射表征页岩孔隙结构的影响[J].特种油气藏,2026,33(4):32-37,6.基金项目
四川省自然科学基金"四川盆地五峰—龙马溪组海相页岩有机质生气、成孔和石墨化机理研究"(2024NSFSC0088) （2024NSFSC0088）
国家自然科学基金"陆相页岩有机孔隙差异发育机理及效应研究"(41972161) （41972161）
中国石油-西南石油大学科技合作项目"四川盆地湖相页岩油地质评价参数、标准及体系研究"(2020CX050103) （2020CX050103）
