Hydrocarbon Play Assessment in Fuba Field, Onshore Niger Delta, Nigeria

Hydrocarbon Play Assessment in Fuba Field, Onshore Niger Delta, Nigeria, are here presented, using 3D seismic and well log data. Two distinct horizons (A and I) were correlated across all seven wells in the field. The two reservoir sand units were evaluated quantitatively for petrophysical properties such as shale volume, total porosity, effective porosity, net-to-gross (NTG) and water saturation. Shale volume values have a range of 8 to 14% in reservoir A and 10 to 25% in reservoir I. Porosity values have a range of 25.00 to 30.00% in reservoir A and 19.00 to 37.00% in reservoir I. NTG values have a range of 86.00 to 92.00% in reservoir A and 75.00 to 90.00% in reservoir I, water saturation values have a range of 10.00 to 41.00% in reservoir A and 11.00 to 54.00% in reservoir I. Structural interpretation of seismic data revealed that the field is highly faulted with synthetic and antithetic faults which are in line with faults trends identified in the Niger Delta. A total of twenty-nine faults were interpreted across the entire seismic data. Fault and horizon interpretation revealed that closures found on A and I reservoirs are collapsed crestal structures bounded by two major faults. The depth structure maps reveal that the reservoirs are anticlinal and fault supported. Reservoir A is found at a shallower depth from 6500 to 7500 ft while reservoir I is found at a depth ranging from 11500 to 13000 ft. The seismic attributes interpreted include variance edge and chaos. The variance edge and chaos attribute values range from 0.00 to 1.00. They revealed the subtle structures and faults in the seismic section. The trapping mechanism of the field is of both anticlinal and fault-assisted closure also, the viability of the reservoir units is high from the computed petrophysical parameters.