Dynamic motion monitoring of a 3.6 km long steel rod in a borehole during cold-water injection with distributed fiber-optic sensing
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Published:2022-01-19
Issue:1
Volume:13
Page:161-176
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ISSN:1869-9529
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Container-title:Solid Earth
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language:en
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Short-container-title:Solid Earth
Author:
Lipus Martin PeterORCID, Schölderle Felix, Reinsch ThomasORCID, Wollin ChristopherORCID, Krawczyk CharlotteORCID, Pfrang Daniela, Zosseder Kai
Abstract
Abstract. Fiber-optic distributed acoustic sensing (DAS) data find many applications
in wellbore monitoring such as flow monitoring, formation evaluation and well integrity studies. For horizontal or highly deviated wells,
wellbore fiber-optic installations can be conducted by mounting the sensing
cable to a rigid structure (casing/tubing) which allows for a controlled
landing of the cable. We analyze a cold-water injection phase in a
geothermal well with a 3.6 km long fiber-optic installation mounted to a
3/4 in. sucker rod by using both DAS and distributed
temperature sensing (DTS) data. During cold-water injection, we observe
distinct vibrational events (shock waves) which originate in the reservoir
interval and migrate up- and downwards. We use temperature differences from
the DTS data to determine the theoretical thermal contraction and integrated
DAS data to estimate the actual deformation of the rod construction. The
results suggest that the rod experiences thermal stresses along the
installation length – partly in the compressional and partly in the
extensional regime. We find strong evidence that the observed vibrational
events originate from the release of the thermal stresses when the friction
of the rod against the borehole wall is overcome. Within this study, we show
the influence of temperature changes on the acquisition of distributed
acoustic/strain sensing data along a fiber-optic cable suspended along a
rigid but freely hanging rod. We show that observed vibrational events do
not necessarily originate from induced seismicity in the reservoir but
instead can originate from stick–slip behavior of the rod construction that
holds the measurement equipment.
Funder
Horizon 2020 Framework Programme Bayerisches Staatsministerium für Wirtschaft und Medien, Energie und Technologie Ministerie van Economische Zaken
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Earth-Surface Processes,Geochemistry and Petrology,Geology,Geophysics,Soil Science
Reference43 articles.
1. Allen, R. V.: Automatic earthquake recognition and timing from single
traces, B. Seismol. Soc. Am., 68, 1521–1532, https://doi.org/10.1785/BSSA0680051521, 1978. 2. Beyreuther, M., Barsch, R., Krischer, L., Megies, T., Behr, Y., and Wassermann, J., ObsPy: A Python Toolbox for Seismology SRL, 81, 530–533, https://doi.org/10.1785/gssrl.81.3.530, 2010. 3. Becker, M. W., Ciervo, C., Cole, M., Coleman, T., and Mondanos, M.: Fracture
hydromechanical response measured by fiber optic distributed acoustic
sensing at milliHertz frequencies, Geophys. Res. Lett., 44, 7295–7302, https://doi.org/10.1002/2017GL073931, 2017. 4. Becker, M. W., Coleman, T. I., and Ciervo, C. C.: Distributed Acoustic
Sensing as a Distributed Hydraulic Sensor in Fractured Bedrock, Water Resour. Res., 56, e2020WR028140,
https://doi.org/10.1029/2020WR028140, 2020. 5. Berman, A. D., Ducker, W. A., and Israelachvili, J. N.: Origin and
Charactrization of Different Stick-Slip Friction Mechnanisms, Langmuir, 12, 4559–4563,
https://doi.org/10.1021/la950896z, 1996.
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