System for recording seismic reflection signals in true amplitude

摘要

A seismic exploration system employs a seismic energy source, a plurality of seismic energy detectors, and a seismic recording system. The recording system employs amplifiers, a multiplexer, and an analog-to-digital converter for converting analog seismic reflection signals resulting from repetitive firings of the seismic energy source to a serial output of multiplexed digital samples. Each digital sample is applied to a shift register and shifted along the shift register a number of positions equal to the digital number that represents the amount of the amplification applied to the seismic reflection signal by an amplifier in the recording system. Each digital sample is then strobed out of the shift register to a utilization device and represents the amplitude of that portion of the seismic reflection signal represented by the digital sample and as originally received by the recording system from the seismic energy detectors.