Autocorrelogram Migration of Drill-Bit Data

M-013 AUTOCORRELOGRAM MIGRATION OF DRILL-BIT DATA JIANHUA YU 1 LEW KATZ 2 FRED FOLLOWILL 3 and GERARD T. SCHUSTER 1 1 University of Utah Salt Lake City Utah 84112 U.S.A 2 Utah Geophysical Inc. 3 Lawrence Livermore National Laboratory Abstract The goal of Inverse Vertical Seismic Profiling While Drilling (IVSPWD) is to image the subsurface structure with seismic data generated by a rotating drill bit at depth. Here the data are recorded on the earth’s free surface. This paper presents the results of applying an autocorrelogram migration method to seismic data recorded while a tri-cone drill-bit and down hole motor