The Dual Laterolog tool is designed to measure formation resistivities (Rt) in boreholes with conductive mud systems. An array of electrodes is configured to achieve resistivity measurements with two different depths of investigations (Deep and Shallow Laterolog resistivities). The return electrodes are positioned far away from the emitting electrodes in the tool string to allow for deep penetration of the formation.

Laterolog can be applied to solve the following tasks:

- identification of reservoir rocks;

- measure Rxo and Rt;

- estimate reservoir saturation.