Geological Behavior (GBR)

The geothermal energy potential in southeastern Niger Delta, Nigeria, was evaluated using high-resolution aeromagnetic data. The study examined key thermal parameters, including Curie Point Depth (CPD), Geothermal Gradient, Heat Flow, and magnetic source depths, to assess the feasibility of geothermal energy production. Results show significant spatial variations in geothermal characteristics, with some areas displaying high exploration potential. Block 9, near Akamkpa (latitude: 5.485°N, longitude: 7.035°E), has the shallowest CPD at 23.27 km, indicating strong geothermal potential due to the proximity of subsurface heat. In contrast, Block 36 near Ikot Abasi (latitude: 4.815°N, longitude: 7.049°E), with a CPD of 83.15 km, presents deeper and less accessible resources. Geothermal Gradient values range from 6.98°C/km to 24.93°C/km, with Block 9 exhibiting a higher gradient, favorable for geothermal energy extraction at shallower depths. Heat flow varies from 17.44 mW/m² to 62.33 mW/m², with Block 9 again showing the highest values, aligning with its shallow CPD and high gradient, suggesting active geothermal processes. In contrast, Block 36 demonstrates lower heat flow and geothermal potential. Magnetic source depth maps and Total Magnetic Intensity residual data also support Block 9 as a promising location for geothermal development. It is recommended that Block 9 be prioritized for further exploration, with detailed geophysical surveys like seismic and magnetotelluric (MT) studies to refine drilling targets.