Articles | Volume 13, issue 1
Research article
19 Jan 2022
Research article |  | 19 Jan 2022

Dynamic motion monitoring of a 3.6 km long steel rod in a borehole during cold-water injection with distributed fiber-optic sensing

Martin Peter Lipus, Felix Schölderle, Thomas Reinsch, Christopher Wollin, Charlotte Krawczyk, Daniela Pfrang, and Kai Zosseder


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on se-2021-63', Ryan Schultz, 06 Aug 2021
    • AC1: 'Reply on RC1', Martin Lipus, 20 Sep 2021
  • RC2: 'Comment on se-2021-63', Anonymous Referee #2, 14 Aug 2021
    • AC2: 'Reply on RC2', Martin Lipus, 20 Sep 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Martin Lipus on behalf of the Authors (27 Sep 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (28 Sep 2021) by Zack Spica
RR by Anonymous Referee #2 (04 Nov 2021)
ED: Publish as is (04 Nov 2021) by Zack Spica
ED: Publish as is (08 Nov 2021) by Federico Rossetti(Executive Editor)
Short summary
A fiber-optic cable was installed along a freely suspended rod in a deep geothermal well in Munich, Germany. A cold-water injection test was monitored with fiber-optic distributed acoustic and temperature sensing. During injection, we observe vibrational events in the lower part of the well. On the basis of a mechanical model, we conclude that the vibrational events are caused by thermal contraction of the rod. The results illustrate potential artifacts when analyzing downhole acoustic data.