ABSTRACT
The
findings of a study to ascertain and assess the petrophysical characteristics
of Cape Three Points reservoirs in the
Western basin with a view to describe the reservoir quantitatively using Well Logs, Petrel and Techlog. The investigated characteristics, which were all deduced from
geophysical wire-line logs, include
lithology, porosity, permeability, fluid saturation, and net to gross
thickness. To characterise the reservoir on the field, a suite of wire-line
logs including gamma ray, resistivity, spontaneous potential, and density logs
for three wells (WELL_1X, WELL_2X, and WELL_3X) from the Tano Cape Three Point
basin were studied. The analyses that were done included lithology delineation,
reservoir identification, and petrophysical parameter determination for the
identified reservoirs. The tops and bases of the three wells analysed were marked at a depth of
1203.06 - 2015.64 m, 3863.03 - 4253.85 m and 2497.38 - 2560.32 m respectively. There were no hydrocarbons in the reservoirs from the studies. The petrophysical parameters computed for each reservoir provided porosities of 13%, 3% and 11% respectively. The water
saturation also determined for these three
wells (WELL_1X, WELL_2X and WELL_3X) were 94%,
95% and 89% respectively. These results together with the behaviour of the
density and neutron logs suggested that these wells are wildcat wells.