DHA-7 다운홀 하이드로폰 배열 DHA-7 DHA-7 Downhole Hydrophone Array
– 시추공에서 사용
– 41mm 직경
– Water-filled 홀에서 사용 가능
– 1~5m 사이에서 수신기 간격 선택 가능
Information
| 제조사 | GEOMETRICS(미국) |
|---|---|
| 활용 | high-resolution downhole, VSP, and crosshole surveys |
| Sensor type | Proprietary Polymer. |
| Frequency response | 10 Hz to 10,000 Hz ± 1.0 dB |
| Capacitance | 5 nF at 22˚C |
| Sensitivity | -197 dB re 1 Volt per 1 μPa. |
| Sensitivity with depth | < 1.0 dB over 400 m depth |
| Maximum total length | 400 m (1,300 ft) (lead plus active section) |
| Channels | 12 or 24 standard; other counts available |
| Operating range | -10˚C to +70˚C (+14ºF to +158°F). |
| Storage range | -40˚C to +70˚C (-40˚F to + 158˚F). |