Sensitivity to Hydrocarbon Targets Using Marine Active Source EM Sounding

E025 SENSITIVITY TO HYDROCARBON TARGETS USING MARINE ACTIVE SOURCE EM SOUNDING Abstract 1 Active source EM sounding is a marine surveying technique used for remote detection of sub-surface resistive layers such as hydrocarbons. In order to design a successful survey it is necessary to understand the controls on the EM response and the sensitivity to the target layer. The fundamental effects of target resistivity thickness depth and width are explained together with the implications for choosing frequency and survey design parameters. The relationship between the parameters allows rapid determination of targets appropriate for successful detection and demonstrates the typical operational