岩石介质流动电位影响因素实验研究  

Experimental Study on Streaming Potential Influence Factors of Flow in Rock Porous Media

作　　者：卜亚辉 李爱芬 刘均荣 张国浩 

机构地区：[1]中国石油大学石油工程学院,山东青岛266580 [2]中国海油天津分公司,天津300452

出　　处：《测井技术》2013年第2期123-127,共5页Well Logging Technology

摘　　要：根据流动电位经典理论及各参数经验公式建立流动电位耦合系数与温度、溶液浓度的关系以及与填砂颗粒之间的关系式,并对各参数的变化规律进行分析。在实验室条件下,利用有机填砂管模型对不同浓度NaCl溶液通过不同尺寸石英砂的流动电位耦合系数进行测量。流动电位耦合系数随填砂颗粒的增大而缓慢增大,随盐水浓度的增加而明显减小。理论公式计算值与实际测量值拟合较好,高矿化度地层水条件下表面导电效应可以忽略。该研究对预测地层条件下油藏流动电位效应变化规律具有指导意义。Based on the classic theory of streaming potential and parameter empirical formula, we establish the relationship of coupling coefficient, temperature, electrolyte concentration and sand grain size, and analyze in detail their changing law. Laboratory experiment is proceeded by use of organic san＆pack tube to measure streaming potential coupling coefficient of varying NaC1 aquae＇s fluid when it flows through different size unconsolidated quartz sand. Experimental result shows that the streaming potential coupling coefficient slowly increases when grain sizes enlarge, and sharply decreases when electrolyte concentration increases. The theoretically calculated coupling coefficient is match well with the practical measured data, and the surface conductance is neglectable under high mineral water condition. This study provides some referances in forecasting reservoir streaming potential changing pattern.

关 键 词：流动电位 动电效应 耦合流动 岩石颗粒 矿化度 

分 类 号：P631.84[天文地球—地质矿产勘探]