文献类型：期刊文献

英文题名：Experimental study on pore fluid characteristics of fractured sandstone based on nuclear magnetic resonance technology

作者：Xu, Youlin Li, Xuelong Wu, Xukun Zheng, Wei Zhou, Bo Tong, Jing

第一作者：徐佑林

通信作者：Li, XL[1];Wu, XK[2]

机构：[1]Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Shandong, Peoples R China;[3]Anhui Univ Sci & Technol, State Key Lab Deep Coal Mine Min Response & Disast, Huainan 232000, Anhui, Peoples R China;[4]Guizhou Wantian Coal Ind Grp Co Ltd, Xiangqiao Coal Mine, Panzhou 553503, Guizhou, Peoples R China;[5]Suzhou Niumag Analyt Instrument Corp, Suzhou 215000, Jiangsu, Peoples R China

第一机构：贵州理工学院矿业工程学院

通信机构：corresponding author), Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Shandong, Peoples R China;corresponding author), Anhui Univ Sci & Technol, State Key Lab Deep Coal Mine Min Response & Disast, Huainan 232000, Anhui, Peoples R China.

年份：2022

卷号：214

外文期刊名：JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING

收录：;EI(收录号：20221812055805);Scopus(收录号：2-s2.0-85129090525);WOS:【SCI-EXPANDED(收录号:WOS:000800557300002)】；

基金：& nbsp;The authors are grateful for the financial support provided by the Guizhou Province Science, Technology Support Program Project (Qiankehe Support [2019] 2861) , National Natural Science Foundation of China (52104204) , and Natural Science Foundation of Shandong Province (ZR2021QE170) . The authors also would like to thank the editors and reviewers for their careful review and advice.

语种：英文

外文关键词：Sandstone; Seepage; LF-NMR; Pore structure; Visualization

摘要：The groundwater seepage in the fractured rock mass affects the stability of the surrounding rock of the roadway. To understand the fluid seepage characteristics and the change law of the microscopic pore structure of the fractured rock mass under different loading conditions, the low-field nuclear magnetic resonance technology (LFNMR) was used to conduct a visual experimental study. The T2 spectrum distribution curve tested by nuclear magnetic resonance indicated that the pore structure of the fractured sandstone sample had three peaks (namely micropores, mesopores, and macropores) with medium and large pores distributed from 0.63 mu m to 100 mu m. Quantitative analysis of nuclear magnetic resonance imaging signals during water flooding of fractured sandstones revealed the characteristics of fluid migration and distribution at different times and locations at different flow rates in the core. The height of the fractured core at 23 mm had small water content and low porosity. The water content at the position of 25-40 mm was higher, and the porosity was large. Under the effect of flow velocity, there were obvious differences in the state of fractured core displacement. That is, the greater the flow velocity, the shorter the water flooding time and the more concentrated the fluid sweep area. The dominant channel for seepage was formed quickly. The research results can provide a reference for preventing the erosion of roadway surrounding rock caused by groundwater fluid.