Geological Behavior (GBR)

Borehole failure poses significant challenges in various industries, including oil and gas exploration, geothermal energy extraction, and groundwater resource management. The method leverages on the principles of aeromagnetic survey, to assess borehole failure in Ilawe and environs in Nigeria. The first vertical derivative with a range of -0.28 to 0.29nT/m. This range suggests moderate enhancement of shallow magnetic sources, indicating noticeable but not extreme near surface contrast. This often correspond to mildly fractured zones, weathered layers or subtle lithological boundaries. In terms of borehole stability, such conditions imply a moderate risk of failure, particularly, if the borehole intersects these weak or discontinuous formations. In terms of susceptibility distribution, across the studied area; North of Irorin, Aaye, and Oke-emo are low to moderately susceptible to borehole failure while Okepa, Iro, and Okeleye have the lowest chances for borehole failure, due to its lowest magnetic susceptibility values. The assessment of borehole failure using the aeromagnetic techniques provided valuable insights into the subsurface conditions and help identify potential issues related to borehole integrity.