Publications

This study presents the first successful application of full tensor Controlled Source Electromagnetic (CSEM) geoelectrical strike analysis in the Tarakan Basin, northeastern Kalimantan—a geologically complex, hydrocarbon-rich deltaic environment. Utilizing data from 50 sites across a broad frequency range (1–8192 Hz), the analysis revealed detailed subsurface structures, including small-scale faults and paleochannel bars, often unresolved by seismic methods alone.

At 64 Hz, geoelectrical strike maps showed strong correlation with seismic-derived facies probability maps, highlighting northwest-southeast-oriented structural trends. The results demonstrate significant geoelectrical anisotropy linked to lithological and fluid variations, offering critical insights into basin evolution and aiding in the identification of potential hydrocarbon traps. This integration of CSEM with seismic data enhances subsurface model accuracy and supports more informed exploration strategies in the Tarakan Basin and similarly complex settings.