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http://dx.doi.org/10.9719/EEG.2018.51.1.39

Spine and Ribs Techniques for Practical use of Standoff Compensation in a Density Log  

Han, Manho (Convergence Research Center for Development of Mineral Resources, Korea Institute of Geoscience and Mineral Resources)
Kim, Yeonghwa (Department of Geophysics, Kangwon National University)
Yi, Myeong-Jong (Convergence Research Center for Development of Mineral Resources, Korea Institute of Geoscience and Mineral Resources)
Kim, Jongman (Smart Korea)
Publication Information
Economic and Environmental Geology / v.51, no.1, 2018 , pp. 39-48 More about this Journal
Abstract
We carried out the standoff compensation data from 2007 to 2011 into four different density borehole models to find out the most effectiveness of standoff compensation charts. First, we investigated the irregular collapse characteristics of gamma ray and cut the non-ideal gamma response to improve the effectiveness of the standoff compensation error data. Effectiveness of detector combinations, density of borehole, and spine and ribs techniques from the modified standoff compensation data was analyzed. As the result of comparison, LSD-MSD combination has been suitable for standoff compensation more than LSD-SSD combination and it is possible to do standoff compensation for soil or weathered zone under groundwater level without fatal errors. Even though error scales of density transformed spine and ribs techniques were generally large compared to the conventional standoff compensation, standoff compensation for soil and weathered zone under groundwater level were sufficiently effective.
Keywords
Density log; Standoff; Gamma ray; Detector combinations; Spine and ribs;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Flaum, C., Galford, J.E. and Hastings, A. (1987) Enhanced Vertical Resolution Processing Of Dual Detector Gamma-Gamma Density Logs. In SPWLA 28th Annual Logging Symposium. Society of Petrophysicists and Well-Log Analysts.
2 Hearst, J.R. and Carlson, R.C. (1969) The RIDS-A density logger for rough holes: Geophysics, v.34, p.222-234.   DOI
3 Hwang, S.H. and Lee, S.K. (1999) Application of geophysical well logging to fracture identification and determination of in-situ dynamic elastic constants, Geophysical Society of Korea 1999 The 2nd International Conference, p.161-162.
4 Kim, K.J. (2001) Experiment for determining calibration coefficients and natural gamma correction in gamma gamma log, Master's thesis, Kangwon national university, p.30.
5 Kim, Y.H., Kim, J.H. and Lee, S.J. (2006) A preliminary study on correction for density log in cased boreholes, The journal of engineering geology, v.16, p.429-435.
6 Ku, B.J., Nam, M.J. and Hwang, S.H. (2012) A study on slim-hole density logging based on numerical simulation. Geophysics and Geophysical Exploration, v.15, p.227-234.   DOI
7 Lee, S.J., Kim, Y.H. and Hwang, B.C. (2008) An experimental study on density log correction for plastic cased slim boregoles, The journal of engineering geology, v.18, p.137-144.
8 Mickael, M.W. (2003) Standoff compensation for nuclear measurements, United States Patent, Patent No. US 6590202 B2.
9 Park, S.G. (2010) Variation property of spine and rib curves and tim lapse standoff compensation, Master's thesis, Kangwon national university, p.7.
10 Pickell, J.J. and Heacock, J.G. (1960) Density logging: Geophysics, v.25, p.891-904.   DOI
11 Schlumberger (1989) Log Interpretation Principles/Applications, Schlumberger Educational Services, Houston, p.13-19.
12 Tittman, J. and Wahl, J.S. (1965) The physical foundations of formation density logging (gamma-gamma): Geophysics, v.30, p.284-294.   DOI
13 Schneider, D.M., Efremov, S.V. and Sale, M.J. (2006) Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement, United States Patent, Patent No. US 7129477 B2.
14 Scott, J.H. (1977) Borehole Compensation Algorithms for a Small-diameter, Dual-detector Density Well-logging Probe, SPWLA Eighteenth Annual Logging Symposium, S, p.431.
15 Stoller, C., Urmi, D.G., Philip, O.G., Nihal, I.W. and Wraight, P.D. (1999) Method for determining formation density photo-electric factor with a multi-detector-gamma-ray tool, United States Patent, Patent No. US 5912460.
16 Wahl, J.S., Tittman, J., Johnstone, C.W., and Alger, R.P. (1964) The dual spacing formation density log: Jour. Of Pet. Tech., v.16, p.1411-1416.   DOI
17 Won, B.H., Hwang, S.H., Shin, J.H., Park, C.J., Kim, J.M. and Hamm, S.Y. (2014) Response characterization of slim-hole density sonde using Monte Carlo method. Geophysics and Geophysical Exploration, v.17, p.155-162.   DOI