摘要
针对松辽盆地扶余致密储层,选取不同渗透率岩心结合核磁共振技术进行了常规水驱与活性水驱物理模拟实验,对致密岩样的微观孔隙结构、可动流体饱和度进行了研究分析,对比了常规水驱与活性水驱之间对原油的动用差异。研究结果表明:致密岩心内微纳米级孔隙、亚微米级孔隙较为发育,岩心孔喉半径分布范围集中在0.01～1μm之间;可动用流体主要赋存于半径大于0.05μm的孔喉内,亚微米级孔对岩心可动流体的贡献较大;活性水驱效果好于常规水驱,活性水驱能使微纳米孔隙中部分原油得到有效动用,且岩心渗透率越低,活性水驱对原油的动用性越好。
Based on the tight oil reservoir of Fuyu block of Songliao basin,different permeability tight oil reservoir cores are used to conduct oil-displacing physical simulating experiment by water and active water floodings combined NMR technology.The microscopic pore structure and movable fluid saturation of tight rock samples were studied and analyzed,and the difference between conventional water drive and active water drive on crude oil was compared.The results show that the complicated pore structure of the tight sand-rock studied is characterized by micro-nano pores and sub-micro pores with average pore throat radius in the range of 0.01-1 microns,the movable fluid is mainly distributed in the pore with radius larger than 0.05 microns,and sub-micron pore contribute more to the core movable fluid.The effect of active water flooding is better than that of conventional water flooding,for it can effectively develop the oil in the micro-nano pores,and in the lower permeability pores can achieve more obvious effect.
作者
周义博
刘卫东
孙灵辉
丛苏男
李阳
严玉忠
ZHOU Yibo;LIU Weidong;SUN Linghui;CONG Su-nan;LI Yang;YAN Yuzhong(School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100190,China;Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang,Hebei 065007,China;Research Institute of Petroleum Exploration and Development,Langfang,Hebei 065007,China)
出处
《中国科技论文》
CAS
北大核心
2018年第21期2493-2498,共6页
China Sciencepaper
基金
国家油气重大专项(2016ZX05010004-004)
关键词
致密油
核磁共振
活性水驱
水驱油
可动流体
tight oil
nuclear magnetic resonance(NMR)
active water flooding
water displace oil
movable fluid
