特种油气藏2017，Vol.24Issue(3)：59-63,5.DOI:10.3969/j.issn.1006-6535.2017.03.011
低渗透油藏改变驱替方向微观机理研究
Study on Microscopic Mechanism of Changing Displacement Direction in Low-Permeability Reservoirs
摘要
Abstract
For further studying the mechanism of changing displacement direction in low-permeability reservoirs to increase water-flooding recovery factor in Daqing Oilfield, artificial plate cores and photoetching glass model were utilized to do oil/water displacement experiments, so as to verify the effect of changing displacement direction to further increase water-flooding recovery factor.The microscopic remaining oil after water flooding was classified into five types, and producing ratios of various remaining oil and displacement migration mechanism were dominantly studied.Numerical modeling technique was applied to model the on-site inverted nine spot well pattern, and the feasibility of changing displacement direction in field practice was verified.The study results show: (1) for low-permeability cores, with the increase of permeability, the increased recovery factor (up to 8.8%) by changing displacement direction gradually augments;(2) after changing injection direction, the producing ratio of the clustering remaining oil is the biggest (34.3% on average);(3) the producing ratio of the remaining oil in dead end is the smallest (15.2% on average).This study provides theoretical guidance and technical support for formulating water-flooding adjustment measures in low-permeability reservoirs in Daqing Oilfield.关键词
低渗透油藏/动用机理/物理模拟实验/改变驱替方向/驱油效果/微观剩余油Key words
low-permeability reservoir/producing mechanism/physical simulation experiment/changing displacement direction/oil displacement effect/microscopic remaining oil分类
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殷代印,房雨佳,辛勇亮..低渗透油藏改变驱替方向微观机理研究[J].特种油气藏,2017,24(3):59-63,5.基金项目
国家自然科学基金"低渗透油藏表面活性剂驱微乳液渗流机理及数值模拟研究"(51474071) （51474071）
