STRATIGRAPHY AND PETROPHYSICAL ANALYSIS FOR HYDROCARBON PAY ZONES “AIW” FIELD NIGER DELTA

Abstract

Stratigraphy and Petrophysical Analysis for Hydrocarbon Zones in “AIW” field Niger Delta was carried out with a view to delineate the lithology of the study area for well log correlation. Determine the petrophysical properties that are attributed to hydrocarbon accumulation and identify the hydrocarbon pay zone using well log data. Four (4) reservoir sands were identified and interpreted, (sand-1, 2, 3, and 4) these indicate high resistivity value that suggested possible hydrocarbon bearing zones. Stratigraphic analysis revealed reservoir sand units with funnel, bow and blocky shapes (motif parttern) indicate very good to excellent reservoir quality. Petrophysical parameters such as porosity (Φ), Net to gross (NTG), permeability (K), percentage of shale (Vsh), and sand thickness obtained from available well logs confirmed the potential of hydrocarbon in place across three (3) wells. Sand-4 has the highest percentage of shale 29.82%, while sand-2 has the lowest percentage of shale 0%. Sand-1, 2 and 3 has the highest Net to gross (NTG) of hydrocarbon accumulation, while sand-4 has the lowest of Net to gross (NTG) of 0.26.Thus, the study established the efficiency of Stratigraphy and petrophysical analysis to effectively delineate, determine and identify hydrocarbon pay zone in “AIW” field Niger Delta.