Abstract

The Niger Delta Basin is one of the most explored geologic basins in Africa. It is located in the Southern
part of Nigeria, Gulf of Guinea, West Africa. This study employed the use of 3-D seismic data (SGY
format) and well log suites (LAS format), and check shot data for the technical interpretation. Well facies
correlation, sequence stratigraphic analysis, structural identification on seismic section were methods used
to assess the petroleum system of the Odigba field. The two mains well facies were identified and they
were the sandy facies and the shaly facies. In all four reservoirs were identified (Res1, Res2, Res3, and
Res4) with Res 3 having appreciable thickness and lateral continuity than other reservoirs. From sequence
stratigraphic analysis, the four reservoirs are associated with LST’s and sands of HST’s, sealing units are
associated with the shales of the HST’s, while the TST’s are also associated with the intra-reservoir seals.
The identified trapping style mechanism include the growth faults, antithetic faults, horsts and grabens,
shale diapir, rollover anticlines and the stratigraphic pinch outs. The migration pathways (through regional
faults, porous and permeable carrier beds). The presence of hydrocarbon indicators (bright spot) on the
seismic section, suggests the presence of hydrocarbon in the reservoirs. However, the presence of gas
flags in the seismic section helped us to understand why all the wells were drilled away from the shale
diapir. In all, the Odigba field can be said to have good hydrocarbon prospects since all the key petroleum
system elements are in place.