Simulation and inversion of ultrasonic pitch-catch through-tubing well logging with an array of receivers |
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| Affiliation: | 1. SINTEF ICT, Acoustics Research Centre, Trondheim, Norway;2. Statoil ASA, Research and Technology, Rotvoll, Norway;1. Department of Aerospace Engineering, Technion — Israel Institute of Technology, Haifa 32000, Israel;2. Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA;3. Department of Mathematics, Southern Methodist University, Dallas, TX 75275, USA;1. School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China;2. Center for Advanced Diffusion-Wave and Photoacoustic Technologies (CADIPT), Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada M5S 3G8;1. IRT Jules Verne, Chemin du Chaffault, 44340 Bouguenais - France;2. Université du Maine, CNRS, LAUM UMR 6613, Av. O. Messiaen, 72085 LE MANS Cedex 9 - France;3. Airbus Group Innovations, Chemin du Chaffault, 44340 Bouguenais - France;1. Department of Electronics and Telecommunication, Norwegian University of Science and Technology, Trondheim, Norway;2. School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia |
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| 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. |
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| Keywords: | Well logging Ultrasonic pitch-catch measurement Finite element simulation Mathematical modelling Inversion |
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