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LOW-FREQUENCY, LOW-NOISE MOLECULAR-ELECTRONIC HYDROPHONE FOR OFFSHORE AND TRANSIT ZONE SEISMIC EXPLORATION
Abstract
The study presents the results of the development of low-noise broadband hydrophone based on molecular electronic technology (MET) for mineral exploration systems in transit zones and on the shelf to depths of about 100 meters. The study investigates amplitude-frequency response (AFR), self-noise, dynamic range, and stability of sensor characteristics. The paper provides the results of experimental studies of prototypes in a laboratory and natural conditions in the Kara sea, including a comparison with hydrophones cable telemetry system ARAM ARIES II based on bottom receivers PZ dual sensor GS-PV-1S. The prototypes of MET hydrophones demonstrated a low level of self-noise?below the Wenz model in the low-frequency region up to 48 dB concerning 1 ?Pa/vHz?the possibility of obtaining qualitatively new seismic information in the low-frequency region, a good signal-to-noise ratio, a wide dynamic range, and linearity of response. The research shows that the characteristics of the MET hydrophone signals in the main frequency band (from 1 to 300 Hz) are not inferior to the characteristics of the reference sensor signals.
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References15
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