泥质砂岩平衡阳离子当量电导计算新方法  

New Method for Calculating Equivalent Conductance of Clay Counterions in Shaly Sand

作　　者：高秦群 王亮[2,3] 孟凡[2] GAO Oinqun;WANG Liang;MENG Fan(Beijing Huanding Technology CO. LTD., Beijing 102249, China;School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;College of Geophysics and Information Engineering, China University of Petroleum, Beijing 102249, China)

机构地区：[1]北京环鼎科技有限责任公司,北京102200 [2]西南石油大学地球科学与技术学院,四川成都610500 [3]中国石油大学地球物理与信息工程学院,北京102249

出　　处：《测井技术》2018年第1期14-19,共6页Well Logging Technology

基　　金：国家自然基金项目页岩气储层微观孔隙结构连续定量表征与含气量评价(41504108);国土资源部沉积盆地与油气资源重点实验室开放性基金项目页岩气储层含气量评价(Zdsys2015003);四川省教育厅自然科学类基金项目页岩气储层微观孔隙结构实验表征及连续定量评价方法(15ZB0057);中国博士后科学基金面上资助"多因素耦合作用下的致密油储层孔隙结构与含油性评价"(2015M582568)

摘　　要：泥质砂岩平衡阳离子当量电导(B)是W-S饱和度计算模型中的关键参数。Waxman与Thomas于1974年提出了B值的实验图版,并于2007年进一步提出了B值的修正新图版。中国学者仍然运用旧的B值图版。在WS模型简要介绍的基础上,详细比较了新、旧B值图版。对比结果显示,25℃时新图版与旧图版B值没有变化。温度大于25℃时,新图版与旧图版平衡阳离子当量电导最大值(Bmax)存在一定差异。地层水溶液浓度较小和地层水电阻率(Rw)较大时,新图版与旧图版B值差异较大。岩石新B值图版计算的泥质砂岩电导率与岩心实验电导率结果吻合性优于利用旧B值图版计算的结果,新的B值图版更加合理可靠。基于新的B值图版,提出了一种B值计算新方法。The equivalent conductance of the clay counterions（B）is a key parameter in the W-S model for calculating saturation of shaly sand.The experimental chart of B was firstly proposed by Waxman and Tomas in 1974.In addition,the revised experimental chart of B was put forward by Waxman and Tomas in 2007.However,Chinese scholars still use the old chart of B.Based on the simply introduction of W-S model,the old and new charts of Bis compared.The comparison of the two charts of Bshows that the new and old chart are same at the temperature 25℃,but different in Bmaxwith temperature greater than 25℃.With low concentration and high resistivity of formation water,the values of the old and new chart of Bare different.The conductivity of shaly sand calculated by the new chart of Bshows a better consistent with experimental result than that calculated by old chart of B,which demonstrates that the new chart of Bis reliable.Based on the new chart of B,a new method for calculating equivalent conductance of the clay counterions（B）in shaly sand is proposed.Case study shows that the water saturation calculatedby new Bis more accurate than that by old B,as water saturation calculated by new B better matches well with the core analyzed result.

关 键 词：测井解释 泥质砂岩 储层 平衡阳离子 当量电导 饱和度 W-S模型 

分 类 号：P631.84[天文地球—地质矿产勘探]