Abstract
In conventional vibroseis surveys, the low-frequency sweep signal is usually 5-6 Hz. The recent development of low-frequency exploration has led to the necessity to examine the ability of conventional vibrators to function at lower-frequencies. Likewise, extended low-frequency sweep signal design techniques are developing rapidly; however, unreasonable sweep signals not only directly harm the life of the vibrator but can lead to deleterious effects on the data. This paper discusses the problems associated with conventional vibrators in extended lowfrequency sweeps and quality control in view of the extended low-frequency signal design, vibrator performance control, and the effect on real-world data.
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