Light hydrocarbon geochemistry of crude oils from Eastern Niger Delta

被引：0
作者：
Adepoju, A. [1 ]
Adekola, S. A. [1 ]
Omotoye, S. [1 ]
Akinlua, A. [2 ]
机构：
[1] Obafemi Awolowo Univ, Dept Geol, Ife, Nigeria
[2] Obafemi Awolowo Univ, Dept Chem, Fossil Fuels & Environm Geochem Grp, Ife 220282, Nigeria
来源：
PETROLEUM SCIENCE AND TECHNOLOGY | 2018年 / 36卷 / 19期
关键词：
classification; eastern Niger Delta; light hydrocarbons; oil; post-generative alterations; DEPOSITIONAL ENVIRONMENT; PETROLEUM; ISOHEPTANES; INVARIANCE; HISTORY;
D O I：
10.1080/10916466.2018.1490767
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Geochemical evaluation of oil samples from the eastern part of the Niger Delta divided into western, eastern, and central sections of the study area was carried out for the characterization of their light hydrocarbons content in order to correlate oils from different parts. The hydrocarbons in the oil samples were determined using gas chromatographic (GC) technique. The results obtained showed that CPI, Pr/Ph, Pr/nC(17), and Ph/nC(18) ratios ranged from 0.99-1.55, 2.19-4.79, 0.92-2.35, and 0.27-0.47, respectively. The Pr/nC(17) versus Ph/nC(18) plot showed that the oils were derived from terrestrial organic materials that were deposited under oxic to suboxic conditions. They are moderately matured with minimal effect of biodegradation on most of the oil samples although two of the oils showed relatively higher degradation. Both bivariate and multivariate plots of the light hydrocarbon ratios differentiated the western and central oils from the eastern oils. The classification of the oils into families was not based on origin but rather on post generative alterations that include reservoir conditions and possibly migration effects. The light hydrocarbon parameters identified can be used in the correlation tools.
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页码：1573 / 1581
页数：9
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