Journal of Geography, Environment and Earth Science International

3D seismic sections, composite well logs and check-shot data were used for four wells in this study. The wells were drilled to the depths of (i) 1627-2541 m, (ii) 1726-2804 m, (iii) 1788-2994 m and (iv) 1955-3409 m. All data were loaded in the petrel software. The in-line (dip) is 1281 and cross-line (strike) 5382 covering a total area of 164,019 m² with a line spacing of 25 m. Five hydrocarbon producing reservoirs (A_1, A_2, A₃, A₄, and A₅) were identified. Well-to-seismic tie revealed that hydrocarbon bearing reservoirs were associated with direct hydrocarbon indicator. Five horizons were studied and four faults mapped for the purpose of carrying out 3-D subsurface structural interpretation. The study showed that the ‘XOX’-field bears a considerable amount of 129,931,627.6 million square cubic feet (MMSCF) of gas in-place and about 173,579,727.3 million barrels (MMBSTB) of oil reserve which could be exploited for commercial purpose.