Scholarly record
SURFACE HYDROCARBON (OIL-TAR AND NATURAL GAS) SEEPAGES OF THE WESTERN OGADEN BASIN, ETHIOPIA
Abstract
The Western Ogaden Basin of eastern Ethiopia represents a frontier hydrocarbon province with significant yet underexplored petroleum potential. This study presents a surface-focused exploration approach based on the identification and interpretation of active hydrocarbon seepages as direct indicators of subsurface petroleum systems. Field observations from Gelemso, Elele River Valley, Tulu Badhassoo, and Darkale reveal occurrences of oil seepages and possible natural gas emissions. These surface manifestations provide evidence for mature source rocks, active migration pathways, and structurally controlled hydrocarbon accumulation. The spatial distribution of seepages suggests a strong relationship with regional fault systems and basin architecture. By integrating surface geological mapping with seepage analysis, this approach offers a cost-effective method for prioritizing exploration targets in data-limited frontier basins. The findings highlight the of surface hydrocarbon indicators in reducing exploration risk and improving drilling success rates. This study supports the emphasis of viable petroleum systems in the Western Ogaden Basin and underscores its potential for future energy resource development in Ethiopia.
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