Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
2006-08-08
2006-08-08
McElheny, Jr., Donald (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
C702S018000
Reexamination Certificate
active
07089118
ABSTRACT:
A method for determining a formation shear wave velocity for a subterranean formation includes propagating a multi-pole acoustic signal in a borehole using an acoustic transmitter and receiving an acoustic waveform from the multi-pole acoustic signal at one or more receivers deployed at the same circumferential position as the transmitter. The method further includes processing the acoustic waveform to determine a borehole guided wave velocity and processing the borehole guided wave velocity to determine the shear wave velocity of the subterranean formation. Isolation, suppression or enhancement of any particular harmonics of the acoustic signal is not required.
REFERENCES:
patent: 4698792 (1987-10-01), Kurkjian et al.
patent: 4774693 (1988-09-01), Winbow et al.
patent: 4779236 (1988-10-01), Sondergeld
patent: 5278805 (1994-01-01), Kimball
patent: 5852262 (1998-12-01), Gill et al.
patent: 5886303 (1999-03-01), Rodney
patent: 5936913 (1999-08-01), Gill et al.
patent: 6614360 (2003-09-01), Leggett, III et al.
patent: 6631327 (2003-10-01), Hsu et al.
patent: 6661737 (2003-12-01), Wisnieswski et al.
patent: 6671224 (2003-12-01), Pabon
patent: 6678616 (2004-01-01), Winkler et al.
patent: 6714480 (2004-03-01), Sinha et al.
patent: 6766252 (2004-07-01), Blanch et al.
patent: 6791899 (2004-09-01), Blanch et al.
X. M. Tang, et al., “Shear-Velocity Measurements in the Logging-While Drilling Environment: Modeling and Field Evaluations,” Petrophysics, vol. 44, No. 2 (Mar.-Apr. 2003), pp. 79-90.
X. M. Tang, et al., “A dispersive-wave processing technique for estimating formation shear velocity from dipole and Stoneley waveforms,” Petrophysics, vol. 60, No. 1 (Jan.-Feb. 1995), pp. 19-28, 9 Figs.
G. L. Varsamis, et al, “LWD Shear Velocity Logging in Slow Formations Design Decisions and Case Histories,” SPWLA 41st Annual Logging Symposium, Jun. 4-7, 2000, Paper O.
C. H. Cheng and M. N. Toksoz, “Elastic Wave Propagation in a Fluid-Filled Borehole and Synthetic Acoustic Logs,” Geophysics, vol. 46, No. 7, Jul. 1981, pp. 1042-1053.
D. P. Schmitt, “Shear Wave Logging in Elastic Formations,” J. Acoust. Soc. A., 84(6), Dec. 1988, pp. 2215-2229.
M. T. Taner, F. Koehler, and R. E. Sheriff, “Complex seismic trace analysis,” Geophysics, vol. 44, No. 6 (Jun. 199); pp. 1041-1063.
C. H. Cheng and M. Nfi Toksoz, “Determination Of Shear Wave Velocities In “Slow” Formations,” SPWLA 24th Annual Logging Symposium, Jun. 37-30, 1983, Paper V.
Georgios L. Varsamis, et al., “A New MWD Full Wave Dual Mode Sonic Tool Design And Case Histories,” SPWLA 40th Annual Logging Symposium, May 30-Jun. 3, 1999, Paper P.
F. EL-Wazeer, et al., “Applications For A Full Wave Sonic LWD Tool in the Middle East,” Society of Petroleum Engineers 13th Middle East Oil Show & Conference, Apr. 5-8, 2003, SPE 81474.
Jennifer Market, et al., “Processing and Quality Control of LWD Dipole Sonic Measurements,” SPWLA 43rd Annual Logging Symposium, Jun. 2-5, 2002, Paper PP.
Chaur-Jian Hsu and Kikash K. Sinha, “ Mandrel effects on the dipole flexural mode in a borehole,” J. Acoust. Soc. Am. 104(4), Oct. 1998, pp. 2025-2039.
McElheny Jr. Donald
PathFinder Energy Services, Inc.
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