Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons
Science Journal of Chemistry
Volume 8, Issue 5, October 2020, Pages: 107-112
Received: Nov. 29, 2019; Accepted: Dec. 19, 2019; Published: Sep. 24, 2020
Views 57      Downloads 45
Authors
Mark Obinna Onyema, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Nwannedi Christian Okoroh, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Ikenna Hope Okorie, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Leo Chigbu Osuji, Department of Pure and Industrial Chemistry, University of Port Harcourt, Port Harcourt, Nigeria
Article Tools
Follow on us
Abstract
Correlations of bulk geochemical properties such as density, API gravity, saturates, aromatics, resins and asphaltenes (SARA) compositions, aliphatic hydrocarbons (from nC8 to nC38) and their diagnostic ratios (Pr/Ph, Pr/nC17 and Ph/nC18) were evaluated for two Niger Delta crude oils (samples A and F) and their mix at different proportions of 4:1, 3:2, 2:3 and 1: 4 (samples B, C, D and E respectively). Pearson correlation showed strong relationships (> 0.99) between sample pairs in their bulk geochemical properties and diagnostic ratios, but variable relationships (0.20 - 0.85) in the aliphatic hydrocarbons which increased with increase in the proportion of sample F. Assessment of aliphatic hydrocarbon compositions by hierarchical cluster analysis (HCA) showed two major groups of clearly differentiated clusters with negative similarity and their plots revealed the aliphatic hydrocarbon compositions increased/decreased from samples A to F and exhibited variable strength for correlation of the oil samples. Plots of ratios of the aliphatic hydrocarbons were used to depict the geochemical compositional variations of the oil samples. Coefficient of determination (R²) of the plots indicate the ratios C 14/C14 + C25, C15/C15 + C24 and C17/C17 + C23 fits well and could account for 99.4%, 99.3% and 99.2% of the geochemical compositional variations of the two Niger Delta crude oils and their proportional mix. The results suggest these aliphatic hydrocarbon ratios could be useful for estimating the composition of two Niger Delta crude oils in their mix.
Keywords
Correlation, Composition, Aliphatic Hydrocarbons, Crude oil Mix, Ratio, Niger Delta
To cite this article
Mark Obinna Onyema, Nwannedi Christian Okoroh, Ikenna Hope Okorie, Leo Chigbu Osuji, Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons, Science Journal of Chemistry. Vol. 8, No. 5, 2020, pp. 107-112. doi: 10.11648/j.sjc.20200805.12
Copyright
Copyright © 2020 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.
References
[1]
J. M. Hunt, “Petroleum geochemistry and geology”, 2nd Edition, W. H. Freeman and Company, U. S. A., 1996, pp. 1-743.
[2]
R. P. Philp, “Formation and geochemistry of oil and gas”, Treatise on geochemistry (Second Edition), 2014, vol. 9, pp. 233-265.
[3]
L. C. Osuji and B. S. Antia, “Geochemical implication of some chemical fossils as indicators of petroleum source rocks”, Journal of Applied Science and Environmental Management, 2005, vol. 9 (1), pp. 45-49.
[4]
M. A. Younes, “Application of biomarkers and stable carbon isotopes to access the depositional environment of source rocks and the maturation of oils, East Zeit field, southern Gulf of Suez Egypt”, Petroleum Science and Technology, 2001, vol. 19, pp. 1039-1081.
[5]
L. O. Oyekunle and O. A. Famakin, “Studies of Nigerian crudes I. Characterization of crude oil mixtures”, Petroleum Science and Technology, 2004, vol. 22, pp. 665-675.
[6]
H. Volk, S. C. George, H. Middleton and S. Schofield, “Geochemical comparison of fluid inclusion and present-day oil accumulations in the Papuan Foreland - Evidence for previously unrecognized petroleum source rocks”, Organic Geochemistry, 2005, vol. 36, pp. 29-51.
[7]
T. K. Al-Ameri, A. K. Al-Temimi, and J. Zumberge, “Assessments of oil characterization, source affinities, and hydrocarbon dynamic of East Baghdad oil fields, Central Iraq”, Marine and Petroleum Geology, 2016, vol. 77, pp. 353-375.
[8]
B. P. Tissot and D. H. Welte, “Petroleum formation and occurrence. A new approach to oil and gas exploration”, Springer-Verlag, New York, 1984, pp. 1-538.
[9]
S. C. Kolonic, J. S. Sinninghe Damste, M. E. Bittcher, M. M. M. Kuypers, W. Kuhntd, B. Beckmann, G. Scheeder and T. Wegner, “Geochemical characterization of cenomanian/turonian black shales from the Tarfaya basins (SW Morocco): Relationship between paleoenvironmental conditions and early sulphurization of sedimentary organic matter”, Journal of Petroleum Geology, 2002, vol. 25, pp. 325-350.
[10]
K. E. Peters, C. C. Walters and J. W. Moldowan, The biomarker guide: Biomarkers and isotopes in petroleum and earth history, 2nd ed, Cambridge University Press, Cambridge, UK, 2005, pp. 1-632.
[11]
G. Shungunam, “Significance of coniferous rain forests and related oils, Gippsland Basin, Australia”, American Association Petroleum Geologist Bulletin, 1985, vol. 69, pp. 1241-1254.
[12]
K. E. Peters and M. G. Fowler, “Applications of petroleum geochemistry to exploration and reservoir management”, Organic Geochemistry, 2002, vol. 33 (1), pp. 5-36.
[13]
A. E. Pomerantz, G. T. Ventura, A. M. McKenna, J. A. Cañas, J. Auman, K. Koerner, D. Curry, R. K. Nelson, C. M. Reddy, R. P. Rodgers, A. G. Marshall, K. E. Peters and O. C. Mullins, “Combining biomarker and bulk compositional gradient analysis to assess reservoir connectivity”, Organic Geochemistry, 2010, vol. 41 (8), pp. 812-821.
[14]
D. He, D. Hou, T. Chen, “Geochemical characteristics and analysis of crude-oil source in the deep-water area of the Baiyun Sag, South China Sea”, Russian Geology and Geophysics, 2018, vol. 59 (5), pp. 499-511.
[15]
L. W. M. Tuttle, R. R. Charpentier and E. M. Brownfield, “Chapter A. Tertiary Niger Delta (Akata-Agbada) petroleum system (No. 719201) Niger Delta province, Nigeria, Cameroon, and Equatorial Guinea, Africa”, U. S. Geological Survey, World Energy Project Open-File Report, 1999, 99-50-H.
[16]
. Hammer, D. A. T. Harper, P. D. Ryan, “PAST: Paleontological statistical software package for education and data analysis”, Paleontologia Electronica, 2001, vol. 4 (1), pp. 9.
[17]
M. O. Onyema, N. C. Okoroh, I. H. Okorie, and L. C. Osuji, “Geochemical characterization of two niger delta crude oils and their mixtures I: Bulk properties and aliphatic hydrocarbon distributions”, Modern Chemistry, 2018, vol. 6 (3), pp. 39-43.
[18]
P. N. Manilla and O. M. Onyema, “Correlation of some crude oils using low molecular weight geochemical markers: A case study of the Niger Delta”, Journal of Chemical Society of Nigeria, 2008, vol. 33, pp. 225-234.
[19]
A. Permanyer, G. Márquez and J. R. Gallego, “Compositional variability in oils and formation waters from the Ayoluengo and Hontomìn fields (Burgos, Spain)”, Implications for assessing biodegradation and reservoir compartmentalization”, Organic Geochemistry, 2013, vol. 54, pp. 125-139.
[20]
C. M. Ekweozor and T. O. Udo, “The Oleananes: Origin, maturation and limits of occurrence in Southern Nigeria’s Sedimentary Basins”, Organic Geochemistry, 1988, vol. 13, pp. 131-140.
[21]
C. I. Eneogwe and O. Ekundayo “Geochemical correlation of crude oils in the NW Niger Delta, Nigeria”, Journal of Petroleum Geology, 2003, vol. 26, pp. 95-103.
[22]
A. O. Barakat, A. Mostafa, M. S. El-Gayar and J. Rullkötter, “Source-dependent biomarker properties of five crude oils from the Gulf of Suez, Egypt”, Organic Geochemistry, 1997, vol. 26 (7 and 8), pp. 441-450.
[23]
J. L. Pavón, A. G. Peña, C. G. Pinto and B. M. Cordero, “Differentiation of types of crude oils in polluted soil samples by headspace-fast gas chromatography-mass spectrometry”, Journal of Chromatography A, 2006, vol. 1137 (1), pp. 101-109.
[24]
N. C. Okoroh, M. O. Onyema and L. C. Osuji, “Compositional significance of phenanthrenes for geochemical correlation of two commingled Niger Delta crude oils”, Petroleum and Coal, 2018, vol. 60 (6), pp. 1328-1335.
[25]
H. I. Halpern, “Development and applications of light-hydrocarbon-based star diagrams”, American Association of Petroleum Geologists Bulletin, 1995, vol. 76, pp. 801-815.
ADDRESS
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
U.S.A.
Tel: (001)347-983-5186