Papers by Adetola Abiodun
PetCoal Journal, 2014
Ditch cutting samples belonging to Nkporo Formation obtained from depth range of 2462m to 2717m i... more Ditch cutting samples belonging to Nkporo Formation obtained from depth range of 2462m to 2717m in the Nzam-1 well, Lower Benue Trough were subjected to Total Organic Carbon (TOC) content and Rock-eval Pyrolysis to evaluate their source rock potential for hydrocarbon generation. The samples are made up of shales, sandy shales, mudstone and sandstone. The shales are fissile, fine grained and dark grey in colour while the sandy shales consist of fine grained, fissile and dark grey shales with significant appearance of fine to medium grained, whitish sands. The mudstone is fine grained, grey in colour and blocky (non fissile), while the sandstone is fine grained, compacted and white in colour. The TOC ranges from 0.08 to 1.45 wt. %, indicating that the samples contain appreciable proportion of organic matter that can generate hydrocarbon. Hydrogen Index and Tmax range from 14 mg/g to 37 mg/g and 436°C to 516°C respectively. Genetic Potential (GP), Production Index (PI) and Calculated Vitrinite reflectance (% Ro) range from 0.32 to 0.59 mg/g rock, 0.35 to 0.43 and 0.69 to 2.13 respectively. Rock-eval data indicate that the sediments contain poor to fair source rock for hydrocarbon with kerogen type III as the predominating organic matter, which is capable of generating dry gas. Tmax and other pyrolysis data suggest that the organic matter in the Nkporo Formation is at the peak of thermal maturity to post maturity with respect to hydrocarbon generation. It is concluded that the heat energy generated from post mature part of the studied section together with the thermal maturity peak to late maturity generally observed for the sediments may have resulted in the dry gas prospect.
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Papers by Adetola Abiodun