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非均相黏弹体复合体系微观驱油机理研究

发表时间:2015-05-31  浏览量:1578  下载量:540
全部作者: 张斌,康万利,赵健,许平胜
作者单位: 中国石油大学(华东)石油工程学院
摘 要: 采用一种低弹高黏的预交联凝胶颗粒(preformed particle gel,PPG)与聚合物溶液复配成非均相黏弹体复合体系,通过可视化微观驱油实验研究其在多孔介质中的通过方式及微观驱油机理,利用化学驱动态模拟实验评价该体系提高采收率的能力。结果表明:PPG在多孔介质中有直接通过、粘附、堵塞、变形通过、隔断通过5种方式,驱油机理主要有选择性调剖机理、深部液流转向机理、PPG弹性变形驱油机理及聚合物驱作用机理。驱油实验结果表明:注入非均相黏弹体复合体系后,采收率达84.47%,与水驱和聚合物驱相比,提高幅度分别为37.83%和17.64%.
关 键 词: 油气田开发工程;非均相;低弹高黏;微观运移;微观驱油;采收率
Title: Study on microscopic flooding mechanism of the heterogeneous viscoelastic composites
Author: ZHANG Bin, KANG Wanli, ZHAO Jian, XU Pingsheng
Organization: School of Petroleum Engineering, China University of Petroleum
Abstract: A kind of preformed particle gel (PPG) with low elasticity and high viscosity was dispersed in polymer solution to form a combination flooding system. The transport behavior of the PPG through a porous medium and its microscopic flooding mechanism were studied by visual microscopic flooding model. The enhanced oil recovery capacity of the dispersed viscoelastic combination flooding system was also studied by chemical flooding simulation tests. The results show that transport behaviors of the PPG through a porous medium can be summarized in five patterns: direct passing through, adsorbed onto rock surface, trapped by throat, deformable passing through, snap-off and passing through. Its microscopic flooding mechanism includes selective conformance control, in-depth diversion, oil displacement of viscoelastic PPG and partially polymer flooding. The simulation experiments show that the oil recovery efficiency increases to 84.47% after the dispersed viscoelastic combination flooding system was injected, that is 37.83% higher than water flooding and 17.64% higher than polymer flooding.
Key words: oil-gas field development engineering; heterogeneous; low elasticity and high viscosity; microscopic migration; microscopic displacement; oil recovery
发表期数: 2015年5月第10期
引用格式: 张斌,康万利,赵健,等. 非均相黏弹体复合体系微观驱油机理研究[J]. 中国科技论文在线精品论文,2015,8(10):1076-1080.
 
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