Integration of Electrical Resistivity and Induced Polarization Technique for Oil Spill Investigation in Kegbara-Dere, Gokana LGA, Rivers State

Abstract

Oil spill is a very complex phenomenon which requires detailed investigation using integrated techniques to identify the major contaminant anomalies in the study area, hence the need to investigate the spill contaminant is very key to obtaining data that would aid in the provision of requisite information for remediation. The study area was modelled using 2-D resistivity and induced polarization tomography for delineation of plumes resulting from the oil spills and those caused by mineralized bodies. 2-D data acquisition techniques were used to obtain apparent resistivity and IP data. Interpretation of electrical resistivity and IP tomograms shows that the hydrocarbon plumes signatures are masked by signatures from polarized bodies within the subsurface. The identification and isolation of the resistivity anomalies from the IP anomalies are of major concern in this research. Resistivity and induced polarization tomograms are used to accurately delineate the plume boundaries and also identify of regions masked by the presence of clays and other mineralized bodies within the subsurface.