Supporting Interpretation of Complex, axisymmetric Invasion by Modeling Wireline Induction and 2-Mhz LWD Resistivity tools


David F. Allen, Barbara I. Anderson, Thomas D. Barber, Qing-Huo Liu, Martin G. Lining,

SPWLA 34th Annual Logging Symposium, June 13-16, 1993



Two fast modeling programs have been devel- oped to simulate resistivity logs for 2-MHz log- ging while drilling (LWD) and for wireline induc tion tools. These programs model many beds, with independent invasion profiles composed of arbitrary radial steps in each bed. Because the modeling pro- grams can reproduce tool responses to realistic in- vasion in detail, they can be used to support the interpretation of complex invasion profiles.