Evaluation of the Nature of Porosity in Carbonate Rock Of Hamanlei Formation, Ogaden Basin, Ethiopia: Implications For Prediction of Reservoir Quality
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Date
2023-06
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Addis Ababa University
Abstract
The Ogaden basin is the largest sedimentary basin in Ethiopia having 350,000 km2 areal
coverage. It is also the most studied sedimentary basin in Ethiopia. Nonetheless, the amount of
data gathered from this baisn is not enough to better comprehend the petroleum system of the
basin. The Hamanlei carbonate rock in the basin makes good reservoir rock. The nature of this
reservoir rock is complex owing to various factors. Despite detail studies were conducted to
understand the reservoir property, particularly core and wireline log study, further studies are
needed for better characterization of this reservoir rock. To further characterize the reservoir
property, i.e. porosity, of this rock and prediction for reservoir quality, petrographic and image
analysis were performed. The outcome of this study provides valuable insights into the
mineralogy and texture of the studied rocks. Furthermore, it highlights the importance of
understanding the different pore types that enables to better interpret the reservoir quality and
potential flow characteristics of the studied rocks. Generally, the porosity value of the reservoir
rock is too small which is caused by the dominant proportion of matrix and cement
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Keywords
porosity in carbonate rock, Ogaden Basin, Ethiopia, Hamanlei formation, Evaluation