Multi-component induction logging response in large dielectric formation

Abstract

Wireline induction logs operating at a frequency of some tens of kHz are used to detect the resistivity of hydrocarbon reservoir. The dielectric constant of typical formation is usually smaller than that of pure water and its effect is negligible for induction log. However some peculiar rocks including organic matter named source rock have large dielectric permittivities caused by polarization, which can lead the traditional induction logging to have an nusual log response. Multi-component induction logging is new log method and has been developed in nearly ten years, which can provide more information about formation than traditional axial instrument and has large potential applications. In this paper, we study the effect of large dielectric constant on multi-component induction logging response and extract the information about resistivity and dielectric permittivity through the different combinations, there by realizing the formation parameters reconstruction and intuitive recognition for the hydrocarbon source rock.