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基于水-油二相体系多孔介质电学性质的Archie理论,探索石油类有机污染土壤物化特征的电阻率指示,对形成适用于污染场地野外勘察及室内模拟试验研究的“非扰动”监测分析方法具有重要的现实意义。采用Miller Soil Box方法研究了东北油田区4种介质在不同电路特征、介质、含水率、孔隙液体(石油污染及盐污染对照)及环境温度条件下的电阻率响应规律,拟合构建了激发-响应关系。结果表明:在室温20℃、不添加任何污染物的条件下,随含水率增加,电阻率呈幂函数关系减小;砂样孔隙液体中所含电解质强弱直接影响其电阻率;在水-油两相体系中砂样电阻率关系曲线都与Archie公式拟合较好;砂样电阻率随温度增加而降低,在0℃以下随温度降低呈直线上升趋势。
Based on the Archie theory of the electrical properties of porous media in water-oil two-phase system, the resistivity of petroleum-contaminated soils was explored. The “non-perturbation” monitoring and analysis for the field investigation and indoor simulation of contaminated sites The method has important practical significance. The Miller Soil Box method was used to study the resistivity response of four media in Northeast Oilfield under different circuit characteristics, media, water cut, pore fluid (oil pollution and salt pollution control) and ambient temperature conditions, and the excitation- Response relationship. The results showed that the resistivity decreased in a power function relationship with the increase of water content under the condition of 20 ℃ without adding any pollutants. The electrolyte contained in the sand-like pore liquid directly affected the resistivity. In the water- The resistivity curves of sand samples in oil two-phase system all fit well with Archie’s formula. The resistivity of sand samples decreases with the increase of temperature, and increases linearly with the temperature below 0 ℃.