Slotting of borehole sequences

A method is described for comparing and correlating borehole sequences using information from one or more physical logs recorded from the boreholes. The method is illustrated by a small worked example. Ways are described whereby constraints may be imposed on the comparison to allow the incorporation of relevant information, such as the presence of marker beds in the stratigraphic sequences. An account is given of the comparison of three boreholes in the Lansing Group of Kansas, USA, and there is a short discussion on the effects of filtering, standardizing, and weighting the logs.