TITLE:
Evaluation of Hydrocarbon Reservoir in the “SIMA” Field of Niger Delta Nigeria from Interpretation of 3D Seismic and Petrophysical Log Data
AUTHORS:
Charles Chibueze Ugbor
KEYWORDS:
Seismic Interpretation, Hydrocarbon Accumulation, Porosity, Reservoir, Niger Delta, Petrophysical Properties, Faults, Horizons
JOURNAL NAME:
International Journal of Geosciences,
Vol.14 No.1,
January
31,
2023
ABSTRACT: 3D seismic and petrophysical log data interpretation
of reservoir sands in “SIMA” Field, onshore Niger Delta has been undertaken in
this study to ascertain the reservoir characteristics in terms of favourable
structural and petrophysical parameters suitable for hydrocarbon accumulation
and entrapment in the field. Horizon and fault interpretation were carried out
for subsurface structural delineation. In all, seven faults (five normal and
two listric faults) were mapped in the seismic section. These faults were major
structure building faults corresponding to the growth and antithetic faults in
the area within the well control. The antithetic fault trending
northwest-southeast and the normal fault trending northeast-southwest on the
structural high in the section act as good trapping mechanisms for hydrocarbon
accumulations in the reservoir. From the manual and auto-tracking methods applied, several horizons were identified and mapped. The section is
characterized by high amplitude with moderate-to-good continuity
reflections appearing parallel to sub-parallel, mostly disturbed by some
truncations which are more fault related than
lithologic heterogeneity. The southwestern part is, however, characterized by low-to-high or variable amplitude
reflections with poor-to-low continuity. Normal faults linked to roll-over
anticlines were identified. Some fault
truncations were observed due to lithologic heterogeneity. The
combination of these
faults acts as good traps for hydrocarbon accumulations in the reservoir. Reservoir favourable petrophysical qualities, having average NTG,
porosity, permeability and water saturation of 5 m, 0.20423, 1128.219 kD and
0.458 respectively.