Reservoir Potential of Gombe Sandstone around Kalshingi Area, Northern Benue Trough, N-E, Nigeria.

Granulometric and petrographic analyses were carried out on the Gombe Sandstone around Kalshingi area of the Gongola Basin, Northern Benue Trough with the aim of investigating its reservoir potential. Based on the granulometric analysis, the Gombe Sandstone in the study area consists of coarse to very fine grained, and poorly to moderately well sorted sandstone. According to the cumulative frequency curves and histograms, the sandstones are mostly negatively skewed with dominantly unimodal distribution which indicates accumulation from a single source. Based on the petrographic study, quartz, feldspar, muscovite, and rock fragments are the framework elements found in the sediments. The sandstones are arkosic to subarkosic, dominantly matrix supported, angular to sub-rounded (low sphericity) grains. These are indications that the sediments have suffered only short distance of transportation, thus making them of poor-moderate reservoir quality. ARTICLE INFO Article history: Received 30 November 2018 Received in revised form 14 May 2019 Accepted 15 May 2019 Published 06 June 2019 Available online 06 June 2019