Some recent improvements in modeling of electromagnetic well-logging sensors via numerical mode-matching

Abstract

The numerical mode-matching (NMM) technique is a very efficient method to solve the electromagnetic problem of logging-while-drilling (LWD) sensors for geophysical prospecting. In this paper we present recent trends that have improved the numerical efficiency of the traditional NMM. Two NMM formulations are discussed here, with focus on its main relevant upgrades compared to previous approaches. We present numerical results for two case scenarios that demonstrate the accuracy of these new proposals to modeling typical well-logging tools used for oil and gas exploration.