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Keywords: waveform data
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Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-TTTT
... HS4 was used to monitor and to record the experimental waveforms. The transmit circuits generate a square-wave pulse as the synchronous signal. In the experiment, the transmitters were fixed, and a hydrophone receiver was moved along the borehole to record the waveform data. The data were successively...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-W
... and waveform mode conversion (especially when monopole energy is used). Images can be blurred by ringing that is inherent in the waveform data, and feature orientation can often be uncertain because of the waveform propagation patterns and lack of azimuthal sensitivity of the measurement. Recent developments...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-22250
... of inline and crossline dipole waveforms. Also, time windowing of the waveform data is not required, as the processing is done in the frequency domain using the flexural dispersion over the full bandwidth of the data. The fast shear orientation is obtained by minimizing an objective function defined...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-A
... acoustic energy output than previous sources and whose polarity and frequency is fully selectable, and new dispersion tracking methods for minimising the uncertainty of slow shear measurements. Digitisation, Recording time, and Memory Because LWD tools do not currently transmit full waveform data...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-B
... machine learning well logging acoustic processing drilling measurement Artificial Intelligence Upstream Oil & Gas log analysis Speech Recognition accuracy slowness curve Symposium velocity error acoustic measurement velocity measurement panel 2 waveform data slowness error...
Proceedings Papers

Paper presented at the SPWLA 46th Annual Logging Symposium, June 26–29, 2005
Paper Number: SPWLA-2005-R
... Upstream Oil & Gas dispersion data frequency range frequency waveform data unconsolidated slow formation dispersion effect spwla 46 well logging modeling slow formation dispersion curve formation alteration wave data slowness log analysis tool wave acoustic measurement kHz...
Proceedings Papers

Paper presented at the SPWLA 44th Annual Logging Symposium, June 22–25, 2003
Paper Number: SPWLA-2003-MM
... measurements. The integrated system approach to the pre-job planning along with the post-processing of LWD data is discussed and illustrated with examples showing the benefits of these technologies. well logging information real time system waveform data shear slowness application Symposium...
Proceedings Papers

Paper presented at the SPWLA 42nd Annual Logging Symposium, June 17–20, 2001
Paper Number: SPWLA-2001-PP
... the algorithm was able to calculate both compressional and shear slownesses. Processing package includes filters operating in the frequency, time, slowness or space domains to minimize competing acoustic modes, especially the tool arrivals that are frequently present in LWD waveform data. Examples demonstrate...
Proceedings Papers

Paper presented at the SPWLA 41st Annual Logging Symposium, June 4–7, 2000
Paper Number: SPWLA-2000-XX
... ABSTRACT This paper describes a signal processing technique that enhances the resolution of formation slowness from the waveform data of an array acoustic tool. The enhanced resolution allows us to detect formation features at a scale from the conventional 3.5 ft, the array aperture, to 0.5 ft...
Proceedings Papers

Paper presented at the SPWLA 36th Annual Logging Symposium, June 26–29, 1995
Paper Number: SPWLA-1995-VV
... data. log analysis waveform data wireline slowness transmitter slowness well logging slowness computed Houston drilling noise spectra strength semblance compressional slowness spwla 36th Upstream Oil & Gas transducer standoff receiver Symposium noise waveform receiver...
Proceedings Papers

Paper presented at the SPWLA 24th Annual Logging Symposium, June 27–30, 1983
Paper Number: SPWLA-1983-XX
... information are used when available. Currently, the computer "learning" procedure takes a few days once the geologic information is developed. After that, waveform data for a new well in the same general area can be processed to produce the desired geologic information within a few hours after logging...

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