Мурманчанин RU - оборудование

Q is 4D Ready and provides fully calibrated seismic surveys qualified for use in a time-lapse study.

Q-Marine allows the recording of 4000 individual hydrophones on each of up to 20 streamers, providing a capability of up to 80,000 channels. The key characteristics of the Q-Marine System are:

- Ultra slim-line streamer with waterproof electronics;
- State of the art proprietary low-power ASIC front end;
- High system reliability accomplished using state of the art technology, redundancy, and real-time system monitoring;
- High-speed ATM fiber optical network;
- High fidelity tubular hydrophones eliminate distortion and improve long-term stability;
- Receiver perturbations eliminated through single-sensor recording and digital calibration;
- Single-sensor recording permits use of online adaptive noise attenuation;
- Inline Q-Fin** streamer steering and acoustic positioning units integrated with streamer power and telemetry system;
- Full streamer acoustic network providing improved positioning accuracy.

• 20 streamers, 4 000 channels
   per streamer
• Max 80 000 channels
• Flexible, Digital group forming,
   single-sensor digitalization and
   recording
• Hydrophone:
   - Tubular ceramic N-5 Hydrophone
   - Sensitivity 6.83 volt/bar
   by digital calibration
   - Capacitance 5.25 nF
• Dynamic range better than 115 dB
• Equivalent input noise less than
   1.26 uV RMS at the 890-mV range
• Total harmonic distortion less than
   -95 dB
• Internal crossfeed isolation better
   than 105 dB
• Channel-to-channel gain accuracy
   +/- 0.5%
• Maximum input signal level
   111-1780 mV RMS, depending on
   pre-amp gain
• Real time acquisition clock
   synchronized to GPS time onboard
• Max +/- 10us deviation from T0
• Power supply 150 to ± 300 Vdc,
   Automatic shutdown on leakage
   (40-mA circuit breaker), Automatic
   shutdown if connector opened
• A/D converters distributed in the
   streamer sections, 4th order
   Delta-Sigma, Dynamic range larger
   than 120 dB
• Output sample intervals 1, 2, 4 ms
• Output sample format 24 bit,
   fixed point
• Low-cut filters:
   - 1.94 Hz analog RC filter
   - Digital IIR Butterworth
   - Frequency 3, 6, 9, and 12 Hz;
   Slope 18 dB/oct
• High-cut filters:
   - FIR, linear or minimum phase
   - 50% or 80% of Nyquist frequency
   - Stopband attenuation >130 dB
• Tape formats: 3590 and 3590E,
   Seg-D 8015, 8024, 8038, 8048

• Test oscillator:
   - THD better than -95 dB,
   output levels up to full pre-amp
   range at 0-dB gain
   - Frequency range 7.8-125 Hz,
   in binary steps
• Test capabilities:
   - Noise
   - DC offset
   - Total harmonic distortion
   - Gain accuracy
   - Cross-feed
   - Impulse response
   - Sensor impedance
• Electronic modules:
   - one per 800 m
   - ATM fiber-optic network
   - Network management
   - Network power supply
   - Dimensions: diameter 76 mm,
   length 414 mm
• Multimode fiber-optic transmission:
   - Transmission rate 155 mbit/sec
   - Spare fiber, automatic switching
• Auxiliary systems:
   - Depth sensor
   - Auxnet for Q-Fin**,
   acoustic positioning, Monowing
   and Tail-buoy communication
   - Aux systems powered from streamer
   - Standard electronics module
   to be used as tail-buoy
   and Monowing power module
• Active streamer:
   - Maximum configuration
   length 12 000 m
   - Kevlar stress members
   - Breaking strength 10 tons
   - Section length 100 m
   - Section diameter 48 mm
   - Polyurethane skin
   - Polyurethane filling foam
• Environmental:
   - Operating temperature:
   from -10 to +50 degrees Celsius
   - Maximum operating depth 100 m
   - Maximum survival depth 1,000 m

**Q-Fin - the Q-Fin steering device controlling streamer separation and position by steering the streamer horizontally and vertically >