Structural interpretation of seismic data from an xy field, onshore Niger Delta, Nigeria

In this study, the hydrocarbon potential of XY-field in (onshore) Niger Delta was evaluated using seismic, well logs and check shot data. Two horizons were identified at 2120ms (horizon A) and 2250ms (horizon B).Two types of faults were identified, which are the synthetic and the antithetic faults. The identified synthetic faults, trending in the Northeast- Southeast direction are; F1, F2, F3, F4, F5, F6 and F7, respectively while the antithetic faults which trend in the Northwest-Southeast direction are A1, A2, A3 and A4, respectively. Two reservoirs were delineated at depth range of 7,000-7,150ft and 8,000- 8,120ft. The principal structure responsible for hydrocarbon entrapment in the field is a structural high which probably correspond to the crest of the rollover structure observed on the seismic sections. This was observed as fault assisted closures on the depth structural map of the horizons. The antithetic and growth faults act as good traps for the hydrocarbon accumulation in the study area.