This study investigates the effect of varying seismic source charge sizes on seismograms in Kwale, a hydrocarbon-rich region of the Niger Delta, Nigeria. High-resolution seismic data acquisition is critical for accurate subsurface imaging and the source energy plays a very important role in determining data quality. Field experiments were conducted using different charge sizes ranging from 2.0kg, 2.5kg and 3.0kg as seismic energy sources at a fixed depth of 20.0m to assess their impact on key seismogram attributes, including signal-to-noise ratio (SNR), depth of reflection events and continuity. The results demonstrates a clear correlation between charge size and data quality: larger charges generally enhanced signal-to-noise ratio and depth of reflection events as well as event continuity. Geological conditions in Kwale, including lithological variability further influenced the energy transmission and recording. The study concludes that careful calibration of seismic source parameters is essential to balance energy penetration with noise control in the Niger Delta’s complex subsurface environment. These findings provide a practical framework for charge size optimization in seismic data acquisition strategies in similar geologic settings.