Abstract

In the deep water areas offshore the west coast of India, thick basalt layers hamper the imaging of deep structures which are possible targets for hydrocarbon exploration. Marine controlled source electromagnetic measurements in the broadside source-receiver configuration allows 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 envelope demonstrated in previous studies