含油气泥质砂岩导电性研究  

CONDUCTIVITY PROPERTIES OF OIL BEARING SHALY SANDSTONE

作　　者：邓少贵[1] 范宜仁[1] 刘兵开[2] 周灿灿 

机构地区：[1]石油大学地球资源与信息学院,山东东营257061 [2]胜利石油管理局测井公司,山东东营257061 [3]冀东勘探开发研究院,河北唐山063200

出　　处：《石油大学学报（自然科学版）》2001年第4期30-33,共4页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：中国石油天然气集团公司"九五"攻关项目 (B970 10 5 )

摘　　要：在不同温度下对不同矿化度的含泥质岩石电阻率进行了实验测量 ,以Waxman Smits模型为依据 ,系统地研究了泥质砂岩的导电特性 ,同时讨论了地层温度、泥质含量、地层水矿化度对阿尔奇参数和Waxman Smits参数的影响。研究结果表明 ,泥质砂岩电导率与地层水电导率不完全呈线性关系。当地层水矿化度较低时 ,两者呈非线性关系 ;当地层水矿化度较高时 ,两者为线性关系。泥质岩石电导率与地层水电导率之间的关系受温度的影响比较明显 ,阳离子交换容量越大 ,不同温度下电导率曲线分开度越大。对于Waxman Smits模型 ,地层因素、胶结指数受温度的影响较小 ,视电阻率增大系数I 、视饱和度指数n 基本不受泥质和地层水矿化度的影响 ,其关键是要准确地确定与粘土有关的平衡离子的当量电导B以及岩石的阳离子交换容量QV 和地层水电阻率Rw。阿尔奇参数是受温度、泥质含量、地层水电阻率等多种因素的影响。The resistivities of core samples with different salinities are measured at different temperatures. The conductivity properties of the oil bearing shaly sandstone are analyzed with Waxman Smits theory. The influences of temperature, shale content and formation water salinity on the parameters in Archie's formula and Waxman Smits equations are discussed. It shows that the conductivity curves between the shaly sandstone and the formation water are not fully linear unless the salinity of water is high enough. The influence of temperature on the conductivity curves depends upon the value of the exchange capacity of the cation. In Waxman Smits model, the formation temperature, value of the exchange capacity of cation, and the salinity of the formation water have little influence on the formation factor and the cement exponent. The resistivity index and the saturation exponent are little dependent on the salinity of the formation water. On the other hand, Archie's parameters are related to temperature, shale content and the resistivity of formation water.

关 键 词：油气地质 含油气泥质砂岩 导电性 地层温度 地层水 平衡离子 等效电导 矿化度 

分 类 号：P618.130.2[天文地球—矿床学] P631.812[天文地球—地质学]