电极型复电阻率测井方法及其应用

Electrode-type complex resistivity logging and its application

根据岩石电性参数 (电阻率、介电常数等 )的频散特性提出了一种复电阻率测井方法。从理论角度看 ,复电阻率测井的独特新颖之处在于把电性参数的频散特性作为测井地层评价的主要依据 ,有望成为剩余油评价、特殊矿化度地层评价的一种有效手段。介绍了电阻率测井的基本原理 ,给出了复电阻率的定义、电阻率频散的概念、复电阻率测井的原理及具体研究方法 ,并给出了电极型复电阻率测井仪器的应用实例 。

In accordance with the remarkable frequency dispersion characteristics of rocks,a complex resistivity logging(CRL) method has been recently proposed by Chinese researchers to improve the residual oil and high/low salinity formation evaluation in the continental sedimentation.The frequency dispersion of rock electrical parameters could be applied to the formation evaluation,which is the main advantage of CRL different from the conventional electrical logging.According to the principle of electrical logging,the concepts of complex resistivity and the frequency dispersion were defined,and CRL was also constrained.Two methods being employed to study CRL,including the laboratory measurement method and the equivalent circuit analog method,were introduced in this paper.An application example of electrode?_type logging instruments based on the electrode?_type CRL data was illustrated to qualitatively explain the validity of CRL.