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MARINE EXPLORATION

OPTOSEIS™ PRM

OptoSeis™: Permanent Reservoir Monitoring

PRODUCT DETAILS

Fiber Optic Permanent Reservoir Monitoring (PRM) provides the best platform for accurate and detailed measurements of changes to the reservoir, enabling better modeling of dynamic reservoir behavior and increased oil and gas production.

FEATURES

  • 3000m depth capability
  • Fiber count: 84 fibers
  • Designed for simplified sensor integration
OptoSeis@2x

SYSTEM SPECIFICATIONS

System Size/Capacity 112 – 250,000 4C Stations
Measurement System Frequency and Wavelength-division Multiplexed Michelson Interferometer
Telemetry WDM/FDM Bi-directional or Uni-directional
Topside Integration Fully Integrated with Production Control Systems or Containerized
(Stand- alone IEC certified module with self-contained UPS, HVAC,
workspace)
Sample Interval Field programmable: 1/4ms – 8ms
System Power (assuming 230VAC supply, excludes UPS & HVAC) 2000 4C receivers = 14 kW, 3000 4C receivers = 17.5 kW, 4000 4C
receivers =21.5 kW

SUBSEA ARRAY SPECIFICATIONS

Maximum water depth 3000 m (qualification testing performed to 4500 m)
Operating temperature -20°C to 60°C (storage/functionally responsive), 0°C to 33°C (full
operational use)
Maximum lead-in distance 50 km without amplification
In-line Sensor Spacing 12.5 – 250 m
Maximum array cable length (receivers @ 50m) 28 km (can be tailored longer if necessary)
Maximum number of array cables per hub/backbone 12 (can be tailored higher if necessary)
Array cable weight in air 1050 kg/km
Array cable weight in water 700 kg/km
Operational load 93.5 kN
Breaking load 171 kN
Cable OD 21.7 mm
Burial Jetted, trenched, rock dump, and non-buried applications supported
Receiver Unit Length 339 mm rigid length (1520 mm including bending strain relief)
Receiver Unit Diameter 160 mm
Receiver Unit Weight in air 19 kg (heavy/non-jetted variant 23 kg)
Receiver Unit Weight in Water 4.5 kg (heavy/non-jetted variant 8.3 kg)
Minimum Bend Radius (under max operational load) 1.25 m

HYDROPHONE SPECIFICATIONS

Type Pressure-balanced Fiber Optic Interferometric Hydrophone
Sensitivity Versus Depth ≤0.5 dB over operational depth range
Maximum Input Signal 35 kPa RMS at 31.25 Hz
Input-referred Noise 2 mPa RMS at 2 ms output sample rate

ACCELEROMETER SPECIFICATIONS

Type Pressure-balanced Fiberoptic Interferometric Accelerometer
Maximum Input Signal 42 m/s2 RMS at 31.25 Hz
Input-referred Noise 3 µm/s2 RMS at 2 ms output sample rate
Fixture Layout Triaxis Orthogonal < +/- 0.5°
Crosstalk Isolation >80 dB

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