Abstract
Qualitative and quantitative analysis were carried out in Kolmani River -1 exploratory wells to determine the shaly-sand reservoir petrophysical parameters such as: shale volume effective porosity, effective water saturation, free water resistivity and hydrocarbon saturation. The reservoir at depth between 6720ft and 7117ft contains a non associated gas and it occurs within the Yolde/Bima stratigraphic formations. The presence of igneous intrusive and the pressure and temperature observations from the well logs show that the basin has been subjected to high geothermal effects which have destroyed a substantial part of the hydrocarbon in place. The geothermal effects converted the hydrocarbon to a dry gas with an estimate of 680Mcf (six hundred and eighty thousand cubic feet) available for production. Also, the 12% effective water saturation shows that the well will not flow during production. The gas volume within the Gongola basin is insignificant.