LOW-FREQUENCY, LOW-NOISE MOLECULAR-ELECTRONIC HYDROPHONE FOR OFFSHORE AND TRANZIT ZONE SEISMIC EXPLORATION

• Published in: International Multidisciplinary Scientific GeoConference : SGEM Vol. 19; no. 1.2; pp. 961 - 968
• Main Authors: Zaitsev, Dmitry, Egorov, Egor, Ryzhkov, Maxim, Velichko, Grigory, Gulenko, Vladimir
• Format: Conference Proceeding
• Language: English
• Published: Sofia Surveying Geology & Mining Ecology Management (SGEM) 01.01.2019
• Subjects: Broadband; Dynamic range; Dynamic stability; Electrodes; Electrolytes; Frequencies; Frequency dependence; Frequency response; Hydrophones; International conferences; Linearity; Low level; Membranes; Mineral exploration; Noise; Offshore; Prototypes; Seismic exploration; Seismic stability; Sensors; Signal to noise ratio; Telemetry; United States > US
• ISSN: 1314-2704
• DOI: 10.5593/sgem2019/1.2/S06.122

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 µPa/√Hz-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.