Marine Time Domain CSEM: an Emerging Technology

Strack, Kurt (KMS Technologies) | Allegar, Norman (KMS Technologies) | Ellingsrud, Svein (Electromagnetic Geoservices)



Recent advances in electronics now enable time-domain, or transient CSEM data, to be reliably acquired in an offshore environment and make the leap from its dominant position in land EM to the marine world. Multiple surveys using autonomous receiver nodes have successfully acquired marine time domain CSEM data. The approach has shown particular benefit in shallow water since the method records only the secondary fields and the signal is not dominated by the primary field.