Abstract:
The limitation of hydrocarbon accumulation to zones of structural high is a major challenge in
hydrocarbon prospecting. This research unveils the possibility of hydrocarbon accumulation at
zones of structural high and gives a systematic approach on the use of well log and seismic data
to determine the hydrocarbon estimate of reservoirs in “VICKAY” field. This research deals
with determining the petrophysical properties and volumetric estimate of hydrocarbon
reservoirs in “VICKAY” field and in mapping structural closures in the field.
The method used for the study involves a workflow in which five reservoirs KAY 1 to KAY 5
were delineated and correlated, horizons and faults mapped, time with depth maps were equally
generated and the reservoir(s) area extent were obtained where anticlinal and fault closures are
observable on the depth structure maps. The volumetric estimate of the reservoirs were then
obtained. The petrophysical properties of the reservoirs show the net pay thickness values range
from 4.62 - 55.17 ft (1.41 – 16.82 m), volume of shale (Vsh) 0.01 - 0.13, porosity (Φ) 0.20 -
0.35, permeability (K) 113 – 712 md, water saturation (Sw) 0.18 – 0.92 and hydrocarbon
saturation 0.08 – 1.00. From the well to seismic tie reservoir tops are identified, five horizons
and six faults labelled F 1, F 2, F 3, F 4, F 5 and F 6 were mapped.
The results show that reservoirs KAY 1 and KAY 2 with hydrocarbon estimate of 11,882,937
barrels and 7,438,583 barrels respectively are of commercial quantity. However, reservoirs
KAY 3, KAY 4 and KAY 5 have estimates of 4,470,516 barrels, 2,523,827 barrels and 225,003
barrels respectively which could be considered as having little commercial relevance. The study
has revealed that reservoirs KAY 1 and KAY 2 should be centered on for commercial
exploitation in terms of oil and gas
