实验流体力学2016，Vol.30Issue(3)：98-103,6.DOI:10.11729/syltlx20150107
岩心微流动的核磁共振可视化研究
Study of micro flow visualization with nuclear magnetic resonance in core
摘要
Abstract
Core micro flow visualization is an important method to study the microcosmic mechanism of the chemical flooding.The latest results of core micro flow visualization by MRI technology in our research group was introduced in detail.Some questions on low field MRI core displacement system (MRICDS)were put forward,and improvement and optimization were made from the two aspects of hardware and software to eliminate interference factors.The exper-iments of fluid image test during water-flooding process were successfully carried out using the improved MRICDS.The real-time signals of NMR and MRI of the oil-water distribution during the flow test were collected,and NMR-T2 spectrums and oil or water distribution images were obtained in different stages.The images with high resolution can meet the request of visually an-alyzing the fluid distribution in the core.Experimental results show that residual oil decreases with PV increasing.The trendline of oil distribution drops rapidly first and then slowly.Images also show the phenomenon of residual oil gathering in the end area in core flow tests and its influ-ence range is about 4mm from the end.A new method of oil saturation by the oil-water distribu-tion map of MRI was introduced,and its results are consistent with that of the traditional method and the error is within 10%.This also shows that the reliability of the oil-water distribution map.This provides a new method for the study of oil saturation.Especially the other advantage <br> of the method is that it can analyze the oil-water saturation at any local position.The results also indicate that the new method of MRI is worthy of further development for fluid distribution visu-alization during core micro flow.关键词
微流动可视化/低场核磁共振/油水分布/端部残滞/饱和度Key words
micro flow visualization/low-field nuclear magnetic resonance/end effect of resid-ual oil/oil or water distribution image/oil or water saturation分类
能源科技引用本文复制引用
狄勤丰,华帅,顾春元,叶峰,庞东山,蒋帆,杨培强..岩心微流动的核磁共振可视化研究[J].实验流体力学,2016,30(3):98-103,6.基金项目
国家自然科学基金(51274136,50874071) （51274136,50874071）
上海市科委重点项目(071605102) （071605102）
上海高校创新团队 （）
上海市重点学科建设项目(530106) （530106）
上海市力学在能源工程中的重点实验室和上海市教委重点项目(高峰学科建设项目) （高峰学科建设项目）
