METHOD FOR CREATING AN IMPROVED SWEEP FOR A SEISMIC SOURCE

摘要

A seismic vibrator for obtaining a true ground force includes a baseplate pad; a baseplate drive system, the drive system is connected to the baseplate pad and moves the baseplate pad up and down; a vibrator controller electronics, the electronics are connected to the drive system and causes the drive system to move the baseplate pad up and down; and a plurality of load cell sensors disposed between the baseplate pad and ground, the sensors measure the vibrator output force during a sweep. A true ground force sweep includes using the load cell sensors to measure an actual output force of a seismic vibrator and electronics to obtain an actual ground force data; using inversion to invert the actual ground force data and desired original pilot sweep to obtain a revised pilot sweep that produces a true ground force sweep; and entering the true ground force sweep into the electronics