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
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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