Volume 6, Issue 3, September 2018, Page: 39-43
Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures I: Bulk Properties and Aliphatic Hydrocarbon Distributions
Mark O. Onyema, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Nwannedi C. Okoroh, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Ikenna H. Okorie, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Leo C. Osuji, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Received: Aug. 26, 2018;       Accepted: Sep. 18, 2018;       Published: Dec. 20, 2018
DOI: 10.11648/j.mc.20180603.11      View  47      Downloads  14
Abstract
Two crude oils from Rivers and Delta States, Niger Delta Nigeria, samples A and F respectively, and their binary mixtures at different compositions, samples B, C, D, and E, were geochemically characterized using bulk properties and aliphatic hydrocarbon distributions. Results of density and API gravity, which classified samples A, B, C, D as light oils and samples E, F as medium oils, were observed to increase and decrease with increase in the composition of oil sample F respectively. The composition of the saturates, from 68.00 to 71.10%, suggest high maturity of the oil samples which did not show a relationship to the compositional mix of the two Niger Delta crude oils. Bimodal distribution of n-alkanes in samples A and B with a slight prominence of the short chain suggest marine source with significant terrestrial input, while the prominence of the long chain n-alkanes in sample F, which suggest a terrestrial source, progressively increased in samples C, D, and E. Pr/Ph ratios from 2.37 to 2.70 suggest source rocks deposited in an oxic environment. Ratios of Pr/nC17, from 0.94 to 1.20, and Ph/nC18, from 0.39 to 0.53, suggest shale source rocks with terrestrial higher plant input. From these results, the geochemical characteristics of the individual Niger Delta crude oils were exhibited by their binary mixtures. However, density, API gravity, n-alkane distribution, Pr/nC17 and Ph/nC18 ratios were expressed relative to the compositional mix of the two Niger Delta crude oils.
Keywords
N-alkane, Composition, Isoprenoid, Crude Oil Mixture, Diagnostic Ratio
To cite this article
Mark O. Onyema, Nwannedi C. Okoroh, Ikenna H. Okorie, Leo C. Osuji, Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures I: Bulk Properties and Aliphatic Hydrocarbon Distributions, Modern Chemistry. Vol. 6, No. 3, 2018, pp. 39-43. doi: 10.11648/j.mc.20180603.11
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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