Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1994-09-26
1997-09-30
Dzierzynski, Paul M.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
2502693, 364422, G01V 504
Patent
active
056728670
ABSTRACT:
A typical nuclear well logging tool forms a count rate data stream including statistical noise. A robust single pass partially deconvolved smoothing filter matched to the tool response is applied to the count rate data to enhance vertical resolution while minimizing the statistical noise increase. The smoothing filter is partially deconvolved by the application of a three point deconvolution characteristic of the cusp portion of a related cusp function and a box function representative of the tool response.
REFERENCES:
patent: 4156914 (1979-05-01), Westell
patent: 4394574 (1983-07-01), Grau et al.
patent: 4467425 (1984-08-01), Schaefer et al.
patent: 4777428 (1988-10-01), Lundback
patent: 4786796 (1988-11-01), Flaum et al.
patent: 5227972 (1993-07-01), Jacobson
SPWLA 22nd Annual Logging Symposium, Schultz et al., "Applications of Digital Filtering Techniques to Nuclear Well Logs", Jun. 1981, Houston, Tx.
Jan A. Czubek, "Quantitative Interpretation of Gamma-Ray Logs in Presence of Random Noise," Inst. Nucl. Physics, SPWLA 27th Annual Logging Symposium, Jun. 9-13, 1986.
L.J. Paden, et al., "Reduction of Poison Noise in the Gamma-Ray Log," Okla. State Univ. SPWLA 16th Annual Logging Symposium, Jun. 17-20, 1985.
C. Flaum, et al., "Enhanced Vertical Resolution Processing of Dual Detector Gamma-Gamma Density Logs," Schlumberger Well Services, Houston, TX. and Schlumberger-Doll Research, Ridgefield, CT.; SPWLA 28th Annual Symposium, Jun. 29-Jul. 2, 1987.
J. E. Galford, et al., "Enhanced Resolution Processing of Compensated Neutron Logs," SPE 15541, 1966.
Jan. A. Czubek, "New Theory, Possibilities, and Practice in Digital Interpretation of Gamma-Ray Logs," Inst. of Nuclear Physics, SPWLA 15th Annual Logging Symposium, May 6-9, 1973.
Ping Sheng, et al., "Bayesian Deconvolution of Gamma-Ray Logs," Geophysics, vol. 52, No. 11, Nov. 1987, pp. 1535-1546.
A. M. Morland, "Special Log Processing for Thin Zones Using Geological Impulse Response Functions, With Particular Application to Total and Spectral Gamma Ray Logs," The Log Analyst, v. 25, No. 6, p. 23, 1984.
W.D. Lyle, et al., "Deconvolution of Well Log Data--An Innovations Approach," The Log Analyst, v. 28, p. 321, 1987.
C.J. Dios, "Inversion of Well Log Data by Method of Maximum Entropy," 10th European Formation Evaluation Symposium, Paper H, Oct. 1985.
G.L. Mathis, "Smoothing Spectral Gamma Logs: A Simple But Effective Technique," Geophysics, v. 52, No. 3, p. 363, 1987.
L. Jacobson, "A Matched Filter Data Smoothing Algorithm," IEEE Transactions on Nuclear Science, vol. 36, No. 1, pp. 1227-1231.
L. Gadeken, et al., "The Utility of combining Smoothing and Deconvolution in Processing Algorithms for Well Log Data," by L. Gadeken, et al., IEEE Nuclear Science Symposium Proceedings, 1990.
Gadeken Larry L.
Jacobson Larry A.
Merchant Gulamabbas A.
Bruce David Vernen
Dzierzynski Paul M.
Halliburton Logging Services Inc.
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