Sub-basalt Imaging Using Broadside CSEM

Marine controlled source electromagnetic measurements in the broadside source-receiver configuration enables mapping of base basalt and underlying structure. We study a case where the spatial resolution of magnetotelluric data is too low to map a thin basaltic layer, making CSEM an important exploration tool that can provide structural information to identify prospects and aid seismic processing. Improvements in acquisition and processing technology are shown to further extend the application window demonstrated in previous studies.