Data processing method of noise logging based on cubic spline interpolation
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22 mar 2021
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Pubblicato online: 22 mar 2021
Pagine: 93 - 102
Ricevuto: 27 nov 2020
Accettato: 31 gen 2021
DOI: https://doi.org/10.2478/amns.2021.1.00014
Parole chiave
© 2020 Wu Hao et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
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Types of noise at different frequencies_
| 1 | Fluid flow in the well (tubing and casing) | 1 kHz |
| 2 | Completion tools (perforation, oil and casing perforation) | 1–3 kHz |
| 3 | Back groove (cement channel, reservoir crack) | 3–5 kHz |
| 4 | Reservoir flow | 10–15 kHz |
Parameters of NTO009 noise logging tool_
| Rated work stress | 20000PSI (138 MPa) |
| Rated working temperature | 350°F (150 °C) |
| Dynamic range | 72 dB |
| Frequency range | From 100 to 12,700 Hz |
| Resolution | 16 bit |
| Number of spectral channels | 128 channels |
| Diameter | 1 in. (43 mm) |
| Length | 2.32 ft. (0.71 mm) |
| Weight | 10 lbs (4.53 kg) |
| Samples length | 10 ms |
| Sampling length | 25.6 Hz |
| Amplifier gain | 22.4–67.8 dB |