Low-frequency Generation Using Seismic Vibrators

Typical specifications for a seismic vibrator include a low-frequency limit determined by the reaction mass weight, the piston stroke and the pump flow rating. Emission of frequencies well below this so-called displacement limit is investigated using dedicated sweep designs. The impact of the low frequency emissions on geophysical and mechanical particle motions is investigated using a variety of different sensors, downhole, along a 2D receiver line and on the seismic vibrator.