关键词: 复电阻率测井, 频散, 岩石电性参数, 地层评价, 电极型测井仪器, 应用实例

Abstract: 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.

Key words: complex resistivity logging, frequency dispersion, rock electrical parameters, formation evaluation, electrode-type logging instrument, application example