Reservoir characterization using integrated seismic attributes and petrophysical parameters in an onshore field of Niger delta basin

An integrated approach of reservoir characterization a field was performed using seismic attributes and petrophysical parameters for the evaluation subsurface geological features hydrocarbon potential an onshore in Niger Delta Basin. Four intervals were identified within wells based on their position stratigraphic column, correlation, which aided principle uniform horizontality, simple rule that sediments are deposited horizontally basic understanding sequence stratigraphy. The study revealed that, four reservoirs predominantly sand units intercalated with shale units. Net to Gross (NTG) values ranges from 79% 87% units, while effective porosity 17% 21%, permeability between 1307mD 1678mD across water saturation lowest 35% (Reservoir C) 78% D. A total fifteen faults interpreted data, surface maps (Time depth maps) closures anticlinal structures fault dependent. further enhanced (structural stratigraphic) extracted such as Reflection intensity, Sweetness, Variance, Envelope, Instantaneous frequency, Time gain, Trace AGC, Local structural dip, Gradient magnitude RMS amplitude. results shows moderate high sweetness (sweet spots) zone interest, Envelope attribute show acoustic impedance contrasts indicating discontinuities, lithology changes possible present (Bright spots). variances gradient signal map out discontinuities caused by fractures signature enabled delineation zone. validates discrimination elastic properties well logs its effectiveness optimizing proper subsurface, thus identifying unmasking hidden (probable bypass) field. has integration is better method fluid any given study.