海洋地质前沿2025，Vol.41Issue(9)：39-46,8.DOI:10.16028/j.1009-2722.2024.282
基于数字岩石技术研究致密砂砾岩储层微孔隙特征及其地质意义
Geological characteristics and significance of micro pores in ultra-low permeability reservoir based on digital rock technology:a case study of the Paleogene Bozhong F structure in the Bohai Sea
摘要
Abstract
Using emerging digital rock technologies of two-dimensional large-scale backscatter image stitching(MAPS),micro CT,focused ion beam scanning electron microscopy(FIB),and fully automatic digital slide scan-ning(AXIOSCAN),combined with conventional experimental methods of casting thin sections,the micro pores of the ultra-low permeability sandstone and conglomerate in the Bozhong F structure of the Paleogene Kongdian Formation in the Bohai Sea area were scanned at multiple scales and dimensions with high precision,and the stor-age significance of micro pores was systematically studied.The experimental results show that the types of micro-pores with pore radius less than 15 μm in the target area were mainly intragranular,intragranular micropores,and intercrystalline micropores.The uneven dissolution of feldspar-rich skeleton particles is the main cause of the in-tercrystalline micropores in the target area.The main distribution range of micropore radius is 0.2～14.8 μm,and the smaller the porosity of the reservoir section,and relatively the greater proportion of nano-and submicron-scale intercrystalline dissolution micropores.The average microporosity in the research area is 7.03%,which has signi-ficant storage significance.Some micropores also serve as storage spaces and throats,with strong fluorescence display,playing a key role in the connectivity between large pores.关键词
渤海海域/数字岩石技术/微孔隙类型/微孔隙半径/储集意义Key words
Bohai Sea/digital rock technology/micro pore type/micro pore radius/storage significance分类
海洋科学引用本文复制引用
王波,王晓东,郝鹏,郝轶伟,张江涛,蔡涛,程焱,尹洪超,陈科,金首任..基于数字岩石技术研究致密砂砾岩储层微孔隙特征及其地质意义[J].海洋地质前沿,2025,41(9):39-46,8.基金项目
中海油能源发展股份有限公司科研项目"基于数字岩心技术的复杂储层表征与渗流机理研究"(HFKJ-GJ201901) （HFKJ-GJ201901）
