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An Experimental Study on Density Log Correction for Plastic Cased Slim Boreholes  

Lee, Seung-Jin (Geobrugg Korea Co., Ltd.)
Kim, Yeong-Hwa (Department of Geophysics, Kangwon National University)
Hwang, Byoung-Chol (Department of Geophysics, Kangwon National University)
Publication Information
The Journal of Engineering Geology / v.18, no.2, 2008 , pp. 137-144 More about this Journal
Abstract
The stand-off errors due to the different separations between the sonde and the borehole wall were measured and analyzed in 4 physical borehole models located in Kangwon National University having different densities with cylindrical and half cylindrical PVC and/or acrylic casings. The analysis of the stand-off error data based on the "spine and ribs" technique suggests a well defined rib line for each model irrespectively of the types and thicknesses of the casing, and that the gradients of the ribs are proportional to the densities of the models. By using these characteristics successful density correction could be made for the plastic casings in NX sized boreholes.
Keywords
density correction; stand-off; PVC casing; spine; rib;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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