ИСТИНА

We conducted extensive experiments to investigate how differently controlled sweep signals can improve full-wave seismic images with the same acquisition parameters compared to standard linear sweep. As a practical seismic source device, we used a lightweight electric vibrator operating in P- and S-wave generation modes to record a 220-m-long line along a university campus sidewalk. Seven different sweeps were tested, including one random signal and five differently coded pseudorandom signals, as these signals are suitable for increasing productivity when acquiring large-scale 3D surveys. We also tested the deterministic Ricker wavelet equivalent sweep for its potential to improve the correlation of the reflected signals. Experimental results show that controlled sweeps can significantly improve seismic images, and that pseudorandom signals have the potential to improve both productivity and image quality.