Organic Geochemical Evaluation of Shale Units of Bokh Formation, Ogaden Basin, Ethiopia

Autor:	Temesgen Oljira, Matthew E. Nton, Oluwadayo O. Sonibare
Rok vydání:	2020
Předmět:	chemistry.chemical_classification Total organic carbon business.industry Mineralogy chemistry.chemical_compound Hydrocarbon chemistry Source rock Natural gas Kerogen Petroleum business Pyrolysis Oil shale Geology
Zdroj:	Open Journal of Geology. 10:565-578
ISSN:	2161-7589 2161-7570
DOI:	10.4236/ojg.2020.105025
Popis:	Shale sample from Bokh Formation, Ogaden basin, Ethiopia was assessed for their petroleum potential by Rock-Eval pyrolysis. The Total Organic Carbon (TOC) values range from 0.76 to 0.86 wt%. These values exceed the minimum value of 0.5 wt% required for potential petroleum source rocks. The genetic potential (GP) and hydrogen index (HI) values range from 0.09 to 0.5 mg/g and 8 - 32 mgHC/gTOC, respectively. These values are generally lower than the minimal 2 mg/g GP and 200 mgHC/g HI required for a potential source rock. Several plots from the Rock-Eval pyrolysis data classify the samples as type IV kerogen with no potential to generate hydrocarbons. The Tmax and Production Index (PI) values range from 388°C to 453°C and 0.28 to 0.46, respectively. These values indicate that the shales are thermally matured. These results show that the shales from the Bokh Formation in Ogaden basin have no potential to generate hydrocarbons mainly crude oil, but are thermally matured and may generate natural gas.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0fcbad0fe9f851d7ee33fc73fd31615e https://doi.org/10.4236/ojg.2020.105025 Zobrazit plný text záznamu