A PETROPHYSICAL AND VOLUMETRIC ANALYSES OF ‘VICKAY’ FIELD, ONSHORE, NIGER DELTA

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