A log combination and computation procedure for calculating the resistivity of the invaded zone, the true resistivity, the diameter of invasion, and the water saturation based on a dual induction-laterolog and a porosity log.

For Baker-Atlas: a “Small-SLAM” or “Mini-SLAM” or “Little-SLAM” is a service combination comprising Density, Neutron and Resistivity measurements (as well as Gamma-Ray), where “Resistivity” can mean a measurement in resistive or conductive environment to define the resistivity of the formation. See also Grand-SLAM.