image caused by the tool eccentricity can often present two pieces of vertical
black strips in the Casing Well. To solve this problem, this paper proposes a correction
algorithm of time eccentricity image based
on ellipse fitting algorithm. This algorithm firstly utilizes borehole diameter data to fit ellipse and compute ellipse’s center, major axis, minor axis and inclination angle and other parameters, and then uses these
parameters to correct eccentrical ultrasonovision time
image. The tested results show that the algorithm can accurately fit ellipse
and correct the eccentrical ultrasonovision time image, which is very important
practical significance on processing the well logging.
Cite this paper
Tu, J. and Yang, B. (2014) A New Correction Algorithm of the Eccentric Ultrasonovision Time Image in the Casing Hole. Applied Mathematics
, 1427-1431. doi: 10.4236/am.2014.510134
 Pang, J.F., et al. (2008) Logging Principle and Instrument. Science Press, Beijing, 328-353.
 Lu, F., Gao, H.J. and Li, J. (2009) A High Performance Ultrasonic TV Imaging Logging Tool. Well Logging Technology, 33, 275-278.
 Yu, H.Q., Qu, W.L. and Huang, Z.L. (1997) The Influences of Tool Eccentricity in a Casing Well on Ultrasonic Echo. Journal of Huazhong University of Science and Technology, 25, 40-43.
 Yu, H.Q., Qu, W.L. and Huang, Z.L. (1999) Influence of Tool Eccentricity in a Well Casing on the Ultrasonic Televiewer Image and Its Correction Processing. Applied Acoustics, 18, 16-20, 43.
 Liu, S.G., Li, P. and Na, Y.L. (2002) Evaluation of the Form Error of Ellipse Based on Least Square Method. Acta Metrologica Sinica, 23, 245-247.
 Tu, J.H. and Yang, B. (2014) The Research of Ellipse Parameter Fitting Algorithm of Ultrasonic Imaging Logging in the Casing Hole. Applied Mathematics, 5, 1317-1321.