1:1 Scale Wellbore Experiment and Associated Modeling for a Better Understanding of Well Integrity in the Context of CO2 Geological Storage

Jean-Charles Manceau (1) , Joachim Trémosa (1) , Pascal Audigane (1) , Francis Claret (1) , L.J. Wasch (2) , F. Gherardi (3) , O. Ukelis (4) , A. Dimier (4) , C. Nussbaum (5) , Y. Lettry (6) , T. Fierz (6)

1 BRGM - Bureau de Recherches Géologiques et Minières
2 TNO - The Netherlands Organisation for Applied Scientific Research
3 IGG-CNR - CNR Istituto di Geoscienze e Georisorse [Pisa]
4 EIFER - European Institute For Energy Research
5 Office fédéral de topographie swisstopo
6 Solexperts AG

In this study, we present a new experiment for following the evolution of the well integrity over time due to different changes in well conditions (pressure, temperature and fluids in contact with the well) in the context of CO2 geological storage. A small section of a wellbore is reproduced in the Opalinus Clay of the underground rock laboratory of Mont-Terri, Switzerland (caprock-like formation) at scale 1:1. This system has been characterized hydraulically and geochemically during three periods: initial state, after an increase in the well temperature and after replacing the fluid by pore water with dissolved CO2. The characterization of the system includes both performing hydro-tests to quantify the hydraulic properties of the well and their evolution over time, and sampling the fluids to analyze the geochemical composition and changes. The results presented in this study confirm the ability of the chosen design to estimate the evolution of the well integrity over time.

Mots clés: CO2 geological storage; well bore integrity; underground rock laboratory

Domaines: Sciences de la Terre

Jean-Charles Manceau, Joachim Trémosa, Pascal Audigane, Francis Claret, L.J. Wasch, et al.. 1:1 Scale Wellbore Experiment and Associated Modeling for a Better Understanding of Well Integrity in the Context of CO2 Geological Storage. Energy Procedia, 2014, 63, pp.5749 - 5753. ⟨10.1016/j.egypro.2014.11.607⟩. ⟨hal-03663785⟩