Journal article Open Access

Delineation of Oil – Polluted Sites in Ibeno LGA, Nigeria, Using Geophysical Techniques

Ime R. Udotong; Justina I. R. Udotong; Ofonime U. M. John


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        <foaf:name>Ime R. Udotong</foaf:name>
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        <foaf:name>Justina I. R. Udotong</foaf:name>
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    <dct:title>Delineation of Oil – Polluted Sites in Ibeno LGA, Nigeria, Using Geophysical Techniques</dct:title>
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    <dcat:keyword>Electrical resistivity</dcat:keyword>
    <dcat:keyword>geophysical investigations</dcat:keyword>
    <dcat:keyword>ground penetrating radar</dcat:keyword>
    <dcat:keyword>oil-polluted sites.</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2015-05-04</dct:issued>
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    <dct:description>Ibeno, Nigeria hosts the operational base of Mobil Producing Nigeria Unlimited (MPNU), a subsidiary of ExxonMobil and the current highest oil &amp;amp; condensate producer in Nigeria. Besides MPNU, other oil companies operate onshore, on the continental shelf and deep offshore of the Atlantic Ocean in Ibeno, Nigeria. This study was designed to delineate oil polluted sites in Ibeno, Nigeria using geophysical methods of electrical resistivity (ER) and ground penetrating radar (GPR). Results obtained revealed that there have been hydrocarbon contaminations of this environment by past crude oil spills as observed from high resistivity values and GPR profiles which clearly show the distribution, thickness and lateral extent of hydrocarbon contamination as represented on the radargram reflector tones. Contaminations were of varying degrees, ranging from slight to high, indicating levels of substantial attenuation of crude oil contamination over time. Moreover, the display of relatively lower resistivities of locations outside the impacted areas compared to resistivity values within the impacted areas and the 3-D Cartesian images of oil contaminant plume depicted by red, light brown and magenta for high, low and very low oil impacted areas, respectively confirmed significant recent pollution of the study area with crude oil.</dct:description>
    <dct:description>{"references": ["I. R. Udotong. Oil-impacted sites in Ibeno LGA: A Technical Report\nsubmitted by Page Environmental Consultancy Ltd for Ministry of Niger\nDelta Affairs, Abuja. Unpublished. 2010.", "National Oil Spill Detection and Response Agency, NOSDRA. National\nOil Spill Detection and Response Agency Act . Act No. 15 of 2006.\nAbuja. 2011. Pp. 128.", "Amnesty International Nigeria: Petroleum Pollution and poverty in the\nNiger Delta. Amnesty Int'l, London. 2009.", "I. R. Udotong, J. I. R. Udotong and O. U. M. John. Delineation of Oilpolluted\nsites in Ibeno. I. Using Microbiological and Physicochemical\ncharacterization. In Press. 2015.", "Henriet, J.P. Direct application of the Dar Zarrouk parameters in\ngroundwater surveys. Geophysical Prospecting, Vol. 24. Pp. 212. 1976.", "RPI. Environmental Baseline Studies for the establishment of control\nCriteria And Standards Against Petroleum-related Pollution in Nigeria.\nFinal Report Submitted to the Nigerian National Petroleum Corporation\n(NNPC), Lagos. 1985", "Department of Petroleum Resources, DPR. Environmental Guidelines\nand Standards in the Petroleum Industries in Nigeria, EGASPIN. DPR,\nLagos. 2002."]}</dct:description>
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