Abstract

This study presents the methodology and results of a 3-D seismic data acquisition conducted in OML Q Field of Niger Delta using dynamite as an energy source, an array of geophones and shot points, and recording instruments. The acquisition involved four major operational sections: surveying, drilling, recording, and seismology, with other auxiliary units. The surveying section produced finished seismic lines, while the drilling section drilled the seismic holes according to pre-defined pattern hole geometry. The recording section charged and detonated sources in the seismic holes to generate seismic wave energy and map the subsurface. The seismology section carried out base station data reduction computation, ensuring data quality control, pre-survey design and parameter definitions, and noise test experimentation and analyses using the fixed shot, split spread array technique. This section also performed LVL/weathering analysis to determine the velocities, “Vw” and “Vc” distribution in the surface, intermediate, and consolidated layers and to determine the weathering depth, “Dw” in the area. The results of the LVL/weathering analysis were used to achieve cophasal alignment of seismic reflection events and ensure optimal signal resolution through static correction. Finally, the records were both vertically and CDP stacked, with the vertical stacking achieved by using multiple source-geophone arrays and the CDP stacking achieved by using CDP Roll along Cables and stacking box migratory switch. The findings of this study provide valuable insights into the subsurface geology of OML Q Field, which can be useful in oil and gas exploration and production.