Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons

Mark Obinna Onyema; Nwannedi Christian Okoroh; Ikenna Hope Okorie; Leo Chigbu Osuji

doi:doi:10.11648/j.sjc.20200805.12

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Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons

Mark Obinna Onyema, Nwannedi Christian Okoroh, Ikenna Hope Okorie, Leo Chigbu Osuji

Published in Science Journal of Chemistry (Volume 8, Issue 5)

Received: 29 November 2019 Accepted: 19 December 2019 Published: 24 September 2020

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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 (R^²) 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.

Published in	Science Journal of Chemistry (Volume 8, Issue 5)
DOI	10.11648/j.sjc.20200805.12
Page(s)	107-112
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Correlation, Composition, Aliphatic Hydrocarbons, Crude oil Mix, Ratio, Niger Delta

References

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APA Style

Mark Obinna Onyema, Nwannedi Christian Okoroh, Ikenna Hope Okorie, Leo Chigbu Osuji. (2020). Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons. Science Journal of Chemistry, 8(5), 107-112. https://doi.org/10.11648/j.sjc.20200805.12

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ACS Style

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. Sci. J. Chem. 2020, 8(5), 107-112. doi: 10.11648/j.sjc.20200805.12

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AMA Style

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. Sci J Chem. 2020;8(5):107-112. doi: 10.11648/j.sjc.20200805.12

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@article{10.11648/j.sjc.20200805.12,
  author = {Mark Obinna Onyema and Nwannedi Christian Okoroh and Ikenna Hope Okorie and Leo Chigbu Osuji},
  title = {Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons},
  journal = {Science Journal of Chemistry},
  volume = {8},
  number = {5},
  pages = {107-112},
  doi = {10.11648/j.sjc.20200805.12},
  url = {https://doi.org/10.11648/j.sjc.20200805.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjc.20200805.12},
  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.},
 year = {2020}
}

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TY  - JOUR
T1  - Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons
AU  - Mark Obinna Onyema
AU  - Nwannedi Christian Okoroh
AU  - Ikenna Hope Okorie
AU  - Leo Chigbu Osuji
Y1  - 2020/09/24
PY  - 2020
N1  - https://doi.org/10.11648/j.sjc.20200805.12
DO  - 10.11648/j.sjc.20200805.12
T2  - Science Journal of Chemistry
JF  - Science Journal of Chemistry
JO  - Science Journal of Chemistry
SP  - 107
EP  - 112
PB  - Science Publishing Group
SN  - 2330-099X
UR  - https://doi.org/10.11648/j.sjc.20200805.12
AB  - 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.
VL  - 8
IS  - 5
ER  -

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Author Information

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

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Mark Obinna Onyema, Nwannedi Christian Okoroh, Ikenna Hope Okorie, Leo Chigbu Osuji. (2020). Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons. Science Journal of Chemistry, 8(5), 107-112. https://doi.org/10.11648/j.sjc.20200805.12

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ACS Style

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. Sci. J. Chem. 2020, 8(5), 107-112. doi: 10.11648/j.sjc.20200805.12

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AMA Style

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. Sci J Chem. 2020;8(5):107-112. doi: 10.11648/j.sjc.20200805.12

Copy | Download

@article{10.11648/j.sjc.20200805.12,
  author = {Mark Obinna Onyema and Nwannedi Christian Okoroh and Ikenna Hope Okorie and Leo Chigbu Osuji},
  title = {Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons},
  journal = {Science Journal of Chemistry},
  volume = {8},
  number = {5},
  pages = {107-112},
  doi = {10.11648/j.sjc.20200805.12},
  url = {https://doi.org/10.11648/j.sjc.20200805.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjc.20200805.12},
  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.},
 year = {2020}
}

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TY  - JOUR
T1  - Geochemical Characterization of Two Niger Delta Crude Oils and Their Mixtures II: Correlation of Bulk Properties and Aliphatic Hydrocarbons
AU  - Mark Obinna Onyema
AU  - Nwannedi Christian Okoroh
AU  - Ikenna Hope Okorie
AU  - Leo Chigbu Osuji
Y1  - 2020/09/24
PY  - 2020
N1  - https://doi.org/10.11648/j.sjc.20200805.12
DO  - 10.11648/j.sjc.20200805.12
T2  - Science Journal of Chemistry
JF  - Science Journal of Chemistry
JO  - Science Journal of Chemistry
SP  - 107
EP  - 112
PB  - Science Publishing Group
SN  - 2330-099X
UR  - https://doi.org/10.11648/j.sjc.20200805.12
AB  - 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.
VL  - 8
IS  - 5
ER  -

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