Abstract
Underground storage of CO2 is one efficient solution to reduce CO2 emissions and to slowdown the greenhouse effect. The objective of the CLEAN project is to investigate the feasibility of CO2 storage in a depleted oil and gas reservoir. For this purpose, one part of the onshore-gas field “Altmark gas field” has been provided for the research. The objective of this paper is to verify the integrity of the research borehole during cooler CO2-injection and to validate the closure of the injection induced cracks in cement due to salt creep by using numerical simulator FLAC3D. After numerical simulation, the critical value of the decreasing temperature in different segments was indicated. It was also proved that, the creep behavior of salt rocks can indeed close the cracks in the cement which leads to the recovery of borehole integrity.
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References
Hou, Z., Wundram, L., Gou, Y.: Entwicklung, Erprobung und Modellierung eines Langzeit-Bohrungsverschlusskonzeptes unter CO2-Einwirkungen; Untersuchung zu Primärspannungszuständen, geomechanischen und hydromechanisch gekoppelten Eigenschaften von Reservoirgesteinen und Cap-Rocks in der Altmark; Numerische Untersuchungen zu THM-gekoppelten Prozessen im Reservoir Nahfeld. Abschlussbericht zum BMBF-Projekt (03G0704Q), Energie-Forschungszentrum Niedersachsen an der TU Clausthal (2012)
DBI, Concept suggestion for the CO2-injection starting of the borehole Aaz 144 of DBI at GDFSUEZ within the project CLEAN, TV III. P II process simulation. DBI-gastechonogie institute GmbH Freiberg (2009) (not published)
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Hou, M.Z., Qiao, Z., Luo, X., Wang, Q. (2013). Numerical Study of CO2-Injection Borehole Integrity with Consideration of Thermo-mechanical Effects. In: Hou, M., Xie, H., Were, P. (eds) Clean Energy Systems in the Subsurface: Production, Storage and Conversion. Springer Series in Geomechanics and Geoengineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37849-2_16
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DOI: https://doi.org/10.1007/978-3-642-37849-2_16
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-37848-5
Online ISBN: 978-3-642-37849-2
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