基于复电阻率—核磁联测实验的三水模型新形式  

A new three-water model based on the complex resistivity-NMR joint survey experiment

作　　者：张丽华[1] 潘保芝[1] 单刚义[1] 阿茹罕[1] 张鹏济 ZHANG Li-Hua;PAN Bao-Zhi;SHAN Gang-Yi;A Ru-Han;ZHANG Peng-Ji(College of Geoexploration Science and Technology,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026

出　　处：《物探与化探》2023年第4期1018-1023,共6页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金面上项目(42072323)。

摘　　要：三水模型在碎屑岩储集层解释中的应用比较广泛,但是三水模型的参数较多,部分参数很难确定,且确定方法多数都是根据研究地区很多实验数据统计而定。为了解决三水模型应用中的多参数问题,本文提出基于复电阻率数据计算阳离子交换容量的新方法,在此基础上提出了三水模型的新形式,并且提出了核磁数据结合遗传最优化算法,确定三水模型的参数值。根据这些参数计算的岩样100%含水时的电阻率与实验测量得到的电阻率相对误差为0.3417。本文提出的方法简单易用,不需要依赖太多的实验数据,只要有复电阻率和核磁实验数据就可以应用。该方法可以为其他地区确定新三水模型参数提供参考和借鉴。Three-water(free water,microcapillary water,and clay water)models are widely used in the interpretation of clastic reser-voirs.However,these models involve many parameters,some of which are difficult to determine.The methods for determining these pa-rameters are mostly based on the statistics of a large amount of experimental data in study areas.To solve the multi-parameter problem in the application of three-water models,this study proposed a new method to calculate the cation exchange capacity based on the complex resistivity data.Accordingly,it built a new three-water model.Then,it determined the parameter values of the three-water model using nuclear magnetic resonance(NMR)data combined with the optimal genetic algorithm.The resistivity of the completely water-saturated rock samples calculated from these parameters had a relative error of 0.3417 compared to the resistivity obtained from experimental measurements.The method proposed in this study is simple and easy to use.Moreover,this method does not rely on too many experimen-tal data but requires only complex resistivity and NMR experimental data.Therefore,this method can be used as a reference for determi-ning the parameters of new three-water models of other areas.

关 键 词：三水模型 三水模型参数 复电阻率 阳离子交换容量 最优化算法 核磁 

分 类 号：P631[天文地球—地质矿产勘探]