纳米颗粒吸附法减阻技术效果的快速评价方法  

Rapid evaluation method of drag reduction effect for nanoparticles adsorption technology

作　　者：狄勤丰[1,2] 丁伟朋[1,2] 王新亮[1,2] 张任良[1,2] 顾春元[1,2] 龚玮[1,2] 

机构地区：[1]上海大学上海市应用数学和力学研究所,上海200072 [2]上海大学上海市力学在能源工程中的应用重点实验室,上海200072

出　　处：《中国石油大学学报（自然科学版）》2012年第3期108-114,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(50874071);国家'863'计划项目(2008AA06Z201);上海市科委重点科技攻关计划项目(071605102);上海高校创新团队建设项目;上海市教委科研创新项目(11CXY32);上海领军人才基金项目

摘　　要：针对目前纳米颗粒吸附法减阻技术效果评价周期长、成本高的不足,通过分析目前室内评价方法及总结纳米颗粒吸附法减阻技术机制研究的成果,提出以岩心吸附片电镜扫描和接触角测试为手段的纳米颗粒吸附法减阻技术效果快速评价方法。基于纳米边界层水流滑移减阻机制,应用岩心等径毛管组模型和Tolstoi提出的滑移长度与接触角的关系,从理论上简要阐述该方法的内在机制。结果表明:新方法能有效缩短评价周期,降低试验成本;快速评价方法的内在机制为纳米颗粒在岩心微通道壁面吸附使表面的接触角超过120°,产生较显著的滑移效应,从而达到减阻效果。A new rapid evaluation method of drag reduction effect for nanoparticles adsorption technology was presented in order to simplify the existing evaluation procedure and reduce the evaluation cost. The SEM and contact angle test of the core slice adsorbed by nanoparticles were used to make the pre-evaluation in the new rapid evaluation method, which was based on the analysis of the existing evaluation methods and a lot of experimental drag reduction results of nanoparticles adsorption technology. Based on the theory of drag reduction caused by wall slip, the internal mechanism of the rapid evaluation method was studied by using the simplified model of core composed of capillaries with the same diameter and the relation between slip length and contact angle proposed by Tolstoi. The results show that the new method could make an evaluation effectively and quickly, the evaluation cycle could be shortened and the evaluation cost could be reduced in large amounts. The inlernal meehanism of the rapid evaluation method is that the contact angle is over 120° through the nanopartic, les adsorption on the wall of core micro-channel, which produces phorogenesis and drag reduction effect.

关 键 词：纳米颗粒 吸附 减阻 电镜扫描测试 接触角 快速评价 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]