A method for estimating values of well log measurements of a first selected type in wellbore sections wherein the measurements of the selected type are determined not to be valid includes establishing a linear relationship between measurements of a first selected type and measurements of a second selected type. The measurements of the second selected type are substantially valid over an entire measured axial section of the wellbore. Correct values of the measurements of the first type in the wellbore sections using measured values of the second type and the linear relationship.