A new sonic array tool for full waveform logging
Conference
·
· Soc. Pet. Eng. AIME, Pap.; (United States)
OSTI ID:6173853
In this paper, the authors describe a new sonic array tool which has an array of eight receivers spaced 6 in. apart, located 8 ft from the nearer of two transmitters. In addition to array capabilities, standard short- and long-spaced sonic logs are available. A special section has been incorporated to give a mudvelocity measurement. The downhole electronics provide digitized waveform acquisitions with an effective resolution capability of 11 bits. To extract the additional answers from the full waveform, slowness-time coherence (STC) processing has been developed. Based on semblance techniques, STC identifies coherent arrivals across the array. Examples of waveforms and processed logs from both open and cased wells are presented to illustrate the tool's capabilities.
- Research Organization:
- Schlumberger Well Services
- OSTI ID:
- 6173853
- Report Number(s):
- CONF-8409104-
- Conference Information:
- Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE13285
- Country of Publication:
- United States
- Language:
- English
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