Abstract
This work evaluated the hydrocarbon potential of Campanian source rocks of Nkporo Shale (Mgbom section) using parameters like Soluble Organic Matter (SOM), Total Organic Carbon (TOC) and Organic Matter Quality (OM) on samples taken from the section. The Nkporo Shale is dark grey in color and is highly fissile with interbeds of sandy shale, siltstone and mudstone. The investigated section exposed at Mgbom, Ebonyi State consisted of the Nkporo Shale, a formation in the Lower Benue Trough. The rocks are fairly to moderately rich in organic matter and can therefore be considered as potential source rocks. TOC analysis on sample revealed from the Mgbom Section in the range of 0.51w%-1.02wt% which exceeds the minimal amount needed for a potential source rock. The SOM ranges from 67mg/kg – 165mg/kg and the OM ranges from 77.40% – 89.30% indicating that the source rock is fairly rich in hydrocarbon content.
Highlights
Notable scholars had carried out intensive research and studies on the geology of Santonian to Maastrichtian sediments in the Lower Benue Trough of Nigeria in the past and in the present; they reported that the Agwu and Nkporo Shale constituted the main source and seal rock and that the percentage of the organic carbon to the Santonian Shales was quite comparable to those of the nearby Niger Delta
The Organic Matter (OM) ranges from 77.40 – 89.30% indicating that the source rock is fairly rich in hydrocarbon content
The investigated section exposed at Mgbom, Ebonyi State consist of the Nkporo Shale, a formation in the Lower Benue Trough
Summary
Notable scholars had carried out intensive research and studies on the geology of Santonian to Maastrichtian sediments in the Lower Benue Trough of Nigeria in the past and in the present; they reported that the Agwu and Nkporo Shale constituted the main source and seal rock and that the percentage of the organic carbon to the Santonian Shales was quite comparable to those of the nearby Niger Delta. TOPOGRAPHY AND DRAINAGE OF THE STUDY AREA Afikpo is an undulating terrain with lateral extensive outcrops and formations covering large land masses. The drainage pattern of Afikpo is controlled by Ndibe beach, Ozizza beach and tributaries from Iyowa and Iyogae River which flows eastward to Ebonyi River running from Akpoha towards a Y junction flowing into Cross Rivers and depositing large amounts of sand sediments as a result of the decrease in the intensity or energy of the flowing river.
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