A CSEM case study in Southeast Asia

Abstract

This case study presents the CSEM results of 3D datasets acquired over three prospects in a frontier deepwater area in Southeast Asia. The survey was performed as part of the requirements for the drilling campaign in order to mitigate exploration risk. To obtain an understanding of the subsurface resistivity distribution, the acquired CSEM data were subjected to basic processing and inversion before further interpretation. Resistive features corresponding to the anticipated prospect outlines are observed in the attribute analysis and unconstrained 3D isotropic inversion results. Subsequently, post inversion modelling suggests that localized resistors are clearly required in the target area to explain the measured data for two out of the three prospects. Finally, the CSEM results obtained have provided useful input in conjunction with other G&G data for firming-up the drilling priority between the prospects.