The fiber optic hydroacoustic towed streamers (antennae) are intended for geophysical research, search and exploration of hydrocarbon deposits.
CHARACTERISTICS
Towed streamer’s outer diameter – 25 mm
Number of sensors – 96
Distance between sensor’s phase centers – 1.56 m
Overall length of the streamer’s active part – 150 m
Feeder cable length – 100 m
Frequency range – from 3 to 2500 Hz
Minimal detectable pressure – less than 300 µPa/√Hz at 2.5 Hz at sea state of 0 points
Dynamic range – over 120 dB at 2.5 kHz
Permitted temperature range of offboard equipment operation –from -15 to +50 °С
Operating temperature range of offboard equipment – from -4 to +35 °С
Maximum permitted tensile load – 50 kN
Maximum operational tensile load – 20 kN
Minimum cable bend diameter – 1.5 m
Maximum submersion depth – 100 m
Density - 1.024 g/cm3
ADVANTAGES OF THE DEVELOPMENT
Wide frequency range starting from 3 Hz
Dry weight of cable – 0.5 kg/m
Distance between phase centers – 1.56 m at 96 sensors; that of known counterparts – 3.125 m and more
The towed streamer is executed as a single piece, i.e. has no additional connectors
The towed streamer’s small outer diameter contributes to a decrease in hydrodynamic noise, hydrodynamic resistance, the device’s dry weight and the requirements to a deployment-retrieval system
The streamer’s offboard part has no electronic components and that contributes to its higher durability and fault-tolerance as well as electromagnetic interference immunity
APPLICATION AREAS
Exploration, prospecting, development of mineral deposits, and their extraction