Designing Tools for Casing and/or Borehole Quality Measurement

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Ghafourzadeh, Morteza | 2022

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 55029 (05)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Movahedian Attar, Hamid
Abstract:
Sonic and ultrasonic measurements are used for checking status of wells. Well logging is used to estimate well specifications like borehole diameter, casing thickness, cement bond quality and cement sheath thickness. In this thesis, some reported works in field of sonic/ultrasonic measurement of oil wells are reviewed and results of software implementation of ultrasonic measurement with pitch-catch arrangement, pulse-echo arrangement and phased array arrangement are presented. ultrasonic measurement with pitch-catch arrangement uses one transducer for transmitting ultrasonic waves and two transducers (in different distances) for receiving ultrasonic waves. Ultrasonic measurement with pulse-echo arrangement uses only one transducer to send/receive ultrasonic waves. Ultrasonic measurement with phased array arrangement uses a transducer with multiple elements which can be used individually to send or receive ultrasonic waves. Also, a suitable electronic system for ultrasonic measurement with pitch-catch arrangement is proposed
Keywords:
Phased Array ; Pulse-Echo System ; Pitch-Catch Arrangement ; Cement Bond Tool ; Sonic Tools ; Ultrasonic Tools