METHOD AND APPARATUS FOR DECONVOLVING APPARENT CONDUCTIVITY MEASUREMENTS IN INDUCTION WELL LOGGING

摘要

Induction well logging methods and apparatus are disclosed for deconvolving apparent conductivity measurements obtained for a induction logging coil system. The well logging system is operated so that it has a substantially fixed vertical response. The fixed vertical response function is used to design an inverse (deconvolution) filter by using a minimum Tchebycheff norms technique. The inverse filter function is stored and employed to convert (deconvolve) signals obtained from the induction coil system to signals functionally related to the actual conductivity of an incremental layer of a formation being logged.