中国石油大学学报（自然科学版）2025，Vol.49Issue(2)：183-188,6.DOI:10.3969/j.issn.1673-5005.2025.02.017
海上油田高倍水驱油微观驱油规律试验
Experiment on micro oil displacement of high volume water flooding in offshore oilfields
摘要
Abstract
It is important to deepen the understanding of the oil displacement mechanisms behind high volume water flooding and the changes of rock physical properties of offshore oilfields with high water cut.In this study,an innovative online in-situ imaging set-up for core flooding was used to conduct micro oil displacement experiments using a low-field nuclear magnetic resonance(NMR)technique.Based on the NMR T2 signal analysis,the micro oil displacement efficiency within different pores was quantified,and the changes in pore size distribution during high volume water flooding were examined.A reservoir scale permeability time-varying model was established based on experimental results.The results show that high volume water flooding can significantly reduce residual oil saturation and improve oil displacement efficiency.The contribution from meso-pores to oil recovery is the largest,while the contributions from macropores and small pores are relatively small.Moreover,high volume water flooding can lead to changes in pore size distribution,resulting in an increase of the effective pore volume near the injection site and a decrease in pore volume near the outlet of the core along the direction of water flooding.Further-more,the experimental results show that,after high volume water flooding,the porosity of the core increases and its permea-bility improves.关键词
高倍水驱/微观机制/核磁共振/驱油效率/物性时变Key words
high volume water flooding/micro mechanisms/nuclear magnetic resonance/oil displacement efficiency/time-varying physical properties分类
能源科技引用本文复制引用
李彦来,杨东东,刘春艳,王美楠,郭敬民..海上油田高倍水驱油微观驱油规律试验[J].中国石油大学学报（自然科学版）,2025,49(2):183-188,6.基金项目
中国海洋石油集团公司"十四五"重大科技项目(KJGG2021-0501) （KJGG2021-0501）
