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Simulation and inversion of ultrasonic pitch-catch through-tubing well logging with an array of receivers

Simulation and inversion of ultrasonic pitch-catch through-tubing well logging with an array of receivers

Category
Journal publication
Abstract
Current methods for ultrasonic pitch-catch well logging use two receivers to log the bonded material outside a single casing. For two casings separated by a fluid, we find by simulation that increasing the number of receivers provides a better picture of the effect of the bonded material outside the second casing. Inverting simulated measurements with five receivers, using a simulated annealing algorithm and a simple forward model, we find for a subset of simulations that we can estimate the impedance of the material outside the outer casing.
Language
English
Author(s)
Affiliation
  • SINTEF Digital / Connectivity Technologies and Platforms
  • Equinor
Year
2017
Published in
NDT & E international
ISSN
0963-8695
Volume
85
Page(s)
72 - 75