Description
The borehole hydrophone array WellStreamer is designed for borehole seismic surveys at pressure (P) waves. The hydrophone modules utilize highly sensitive piezoceramic sensors with preamplifiers. The default number of modules on the cable is 24, but it can vary from 1 to 48. The standard interval between pressure sensors is 1 m and the total length of the seismic array can reach 200 m or more.
The hydrophone array can be supplied on a reel with slip ring, which allows to leave the equipment plugged into it while winding and unwinding the cable.
Specification
| Сhannels | 1-24 |
| Frequency range | 1 – 10 000 Hz |
| Capacity of piezoelectric element | 4 000 pF |
| Maximum pressure | 60 at |
| Breaking pressure | 100 at |
| Supply voltage | 12- 16 V |
| Current consumption per channel | 10±1 mA |
| Output impedance of the preamplifier | 395 Ohm |
| Maximum value of the output signal | ±3,8 V |
| Operating temperature range | -10 .. +70 °С |
| Storage temperature range | -40 .. +70 °С |
| Diameter of the hydrophone module | 42 mm |
| Length of the hydrophone module | 200 mm |
| Weight of the hydrophone module | 300 g |
| Interval between hydrophones | on request, but ≥ 0.25 m |
| Braiding of a cable | polyurethane |
| Longitudinal cable sealing | + |
| Screening of cable and hydrophone module | + |
| Cable reinforcement | kevlar |
| Operating load | 200 kg |
| Breaking force | 400 kg |
| Cable diameter | 13 mm |
| Minimum cable coiling radius | 120 mm |
| Minimum coiling radius of the active section | 220 mm |
| Cable Weight | 168 g/m |
| The weight of a streamer length of 130 m with a reel | 38 kg |
| Dimensions with reel | 500×600×400 mm |
| Maximum cable system length | 700 m |
| End Connector | by agreement |
| End load | the lower end of the cable system is equipped with a weight-bearing loop; load can be supplied as agreed |
Additional Equipment
Borehole sources and energy sources
Seismograph
Reels and synchronizer
Processing Software
RadExPro
ZondST2d — 2D seismotomography interpretation (refracted waves)
ZondST3d — 3D seismotomography interpretation (refracted waves)
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