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has been cited by the following article:

• TITLE: The Research of Ellipse Parameter Fitting Algorithm of Ultrasonic Imaging Logging in the Casing Hole

  AUTHORS: Jihui Tu, Bin Yang

  KEYWORDS: BHTV, Ellipse Fitting, Image Correction, Tool Eccentricity

  JOURNAL NAME: Applied Mathematics, Vol.5 No.8, May 20, 2014

  ABSTRACT: In order to estimate intensity and direction of pressure acted on oil well in horizontal, this paper proposes an algorithm of ellipse fitting based on least square method for sections of oil well with ultrasonic imaging logging data. Five parameters about ellipse corresponding to the sections of oil well are extracted and their geometry deformations and direction are estimated. The tested results show that the fitting algorithm is robust and the estimating error of parameter is small, which have very important practical significance on processing the well logging.