ISSN 1119-4618
 

Original Research 
JPAS. 2022; 22(2): 130-146


Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.

Adamu Ibrahim , Timothy Peter Bata , Joseph Amobi Francis, Celestina Sani Zubairu, Asabe Kuku, Grace Pas Adamu.

Abstract
Prospective source rocks (shales) of the Bima Formation in the Gongola Sub-Basin, Northern Benue Trough Nigeria were studied in field and laboratory to increase our understanding on their hydrocarbon generating potential, thermal maturity and plaeodepositional environment. Results obtained from field studies suggest that the Bima Formation was deposited in a fluvial setting owing to the absence of marine fossils and presence of ferruginized beds. Other attributes of fluvial settings observed include mud cracks, poor sorting implying textural immaturity. Results of geochemical analysis obtained shows that the studied shales are rich in organic matter, and inferred to have mostly kerogen Type II-III and Type III which may be able to yield mixed oil and gas and gas respectively. The trisnorhopane thermal maturity (Ts/Tm) values of the studied shales varies between 0.88 and 1.12 implying that the studied shales are within the oil window. Also, cross plot of C29 steranes epimer ratios versus C32 homobopanes epimer ratios range from 0.46 to 0.48 suggesting that all the source rocks are thermally mature. The Pr/n-C17 versus Ph/n-C18 cross-plot and the steranes ternary plot revealed that oil extracted from the studied shale samples originated from organic matter of both marine and terrestrial sources (mixed organic matter) and deposited under anoxic and sub-oxic conditions.

Key words: Oil geochemistry, Bima Formation, Trisnorhopane thermal indicator, Anoxia, Paleoenvironment, Source organic matter


 
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How to Cite this Article
Pubmed Style

AI, TPB, Francis JA, Zubairu CS, Kuku A, Adamu GP, . Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.. JPAS. 2022; 22(2): 130-146.


Web Style

AI, TPB, Francis JA, Zubairu CS, Kuku A, Adamu GP, . Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.. https://www.atbuscienceforum.com/?mno=473 [Access: November 12, 2022].


AMA (American Medical Association) Style

AI, TPB, Francis JA, Zubairu CS, Kuku A, Adamu GP, . Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.. JPAS. 2022; 22(2): 130-146.



Vancouver/ICMJE Style

AI, TPB, Francis JA, Zubairu CS, Kuku A, Adamu GP, . Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.. JPAS. (2022), [cited November 12, 2022]; 22(2): 130-146.



Harvard Style

, A. I., , T. P. B., Francis, J. A., Zubairu, C. S., Kuku, A., Adamu, G. P. & (2022) Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.. JPAS, 22 (2), 130-146.



Turabian Style

, Adamu Ibrahim, Timothy Peter Bata, Joseph Amobi Francis, Celestina Sani Zubairu, Asabe Kuku, Grace Pas Adamu, and . 2022. Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.. Science Forum (Journal of Pure and Applied Sciences), 22 (2), 130-146.



Chicago Style

, Adamu Ibrahim, Timothy Peter Bata, Joseph Amobi Francis, Celestina Sani Zubairu, Asabe Kuku, Grace Pas Adamu, and . "Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.." Science Forum (Journal of Pure and Applied Sciences) 22 (2022), 130-146.



MLA (The Modern Language Association) Style

, Adamu Ibrahim, Timothy Peter Bata, Joseph Amobi Francis, Celestina Sani Zubairu, Asabe Kuku, Grace Pas Adamu, and . "Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.." Science Forum (Journal of Pure and Applied Sciences) 22.2 (2022), 130-146. Print.



APA (American Psychological Association) Style

, A. I., , T. P. B., Francis, J. A., Zubairu, C. S., Kuku, A., Adamu, G. P. & (2022) Oil Geochemistry of Cretaceous Bima Formation Shales in Gongola Sub-Basin Northern Benue Trough Nigeria.. Science Forum (Journal of Pure and Applied Sciences), 22 (2), 130-146.