We are pleased to inform you that the Bay Area Geophysical Society (BAGS) is hosting
Michael Wilt, Lawrence Berkeley National Laboratory, “Electromagnetic imaging though metallic well casing: fundamental concepts and field examples”
October 26, 2017, 2:00pm
LBNL, Building 74, Room 104
Metallic well casing has always presented problems and opportunities for electromagnetic (EM) technology. Although the casing typically distorts the external fields and greatly attenuates the internal fields, it also offers access to deeper formation—thus improving sensitivity over measurements made at the surface. In this talk we will explore the concept of using well casing as an EM antenna, briefly discuss the physics of EM signal transmission in metallic casing, and finally look at some recent numerical and field examples.
Dr Michael Wilt is a staff scientist at Lawrence Berkeley Laboratory (LBNL) where he leads R&D efforts in deep reading electromagnetic (EM) technologies. From 1977 to 1984 he was employed as a staff scientist at LBNL, and from 1989 to 1997 he was the project leader for crosswell EM at Lawrence Livermore National Laboratory. In 1997 he joined Electromagnetic Instruments Inc. (EMI) where he led projects in crosshole EM, surface to borehole EM and extended induction logging. From 2001 to 2015 he was employed by Schlumberger, with the most recent position of Schlumberger Advisor in Deep Reading EM Technologies and center manager to the EMI Technology center in Berkeley, California. Michael Wilt received his B.S (1973) and M.S. (1975) in geophysics from the University of California, Riverside, and his Ph.D. (1991) in applied geophysics from U.C. Berkeley.