Thin-Bed Reservoir Analysis from Borehole Electrical Images

Abstract

ABSTRACT In very thinly bedded sand-shale sequences, sand counts and sand/total ratios can be determined from high resolution electrical images of the borehole wall. This technique is illustrated here by a case study in turbidites with sand laminae down to 1 cm in thickness. The numerical modeling of the tool response and a comparison with fullbore core data help assess the accuracy of bed thicknesses derived from electrical images for this type of formations.