Browsing SINTEF Open by Author "Stenebråten, Jørn"
Now showing items 1-6 of 6
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Benchmark study of undrained triaxial testing of Opalinus Clay shale: Results and implications for robust testing
Minardi, Alberto; Giger, Silvio B.; Ewy, Russel T.; Stancovic, Rudy; Stenebråten, Jørn; Soldal, Magnus; Rosone, Marco; Ferrari, Alessio; Laloui, Lyesse (Peer reviewed; Journal article, 2020)Triaxial testing of argillaceous rocks and shales is significantly more challenging than conventional rock mechanical testing. The challenges are mainly related to the very low permeability of these geomaterials, and their ... -
Can Heating Induce Borehole Closure?
Xie, Xiyang; Bauer, Andreas; Stenebråten, Jørn; Bakheim, Sigurd; Lavrov, Alexandre; Fjær, Erling; Kristiansen, Tron Golder (Peer reviewed; Journal article, 2020)The current study shows that heating a cased borehole in low-permeability shale rock can induce plastic deformation, leading to the closure of the casing annulus and decreasing annulus connectivity. The thermally induced ... -
Characteristic features of shale barrier materials
Fjær, Erling; Stenebråten, Jørn; Bakheim, Sigurd; Larsen, Idar (Peer reviewed; Journal article, 2023)Deep wells in soft formations are completed with a steel tube (“casing”) that isolates the well from the surrounding rock. The annulus between the casing and the rock is usually left open in long sections of the well, thus ... -
Comparing mechanical and ultrasonic behaviour of a brittle and a ductile shale: Relevance to prediction of borehole stability and verification of shale barriers
Holt, Rune Martin; Larsen, Idar; Fjær, Erling; Stenebråten, Jørn (Journal article; Peer reviewed, 2019)Borehole collapse during drilling operations in shale formations is a well-known and costly problem within the petroleum industry. Recently it has become evident that shales may also form sealing barriers around the casing, ... -
Simulations of the effect of smectite-to-illite transition in shales on permeability and overpressures using a stochastic approach, a Norwegian margin case study
Lothe, Ane Elisabet; Grøver, Arnt; Roli, Ole-André; Stenebråten, Jørn; Kristiansen, Tron Golder (Peer reviewed; Journal article, 2023)The smectite-illite transition in shales due to subsidence, temperature changes and diagenesis influences many processes in a sedimentary basin that can contribute to overpressure build up like reducing the shale permeability. ... -
Thermo‑Poromechanical Properties of Pierre II Shale
Agofack, Nicolaine; Cerasi, Pierre; Sønstebø, Eyvind Frode; Stenebråten, Jørn (Peer reviewed; Journal article, 2022)During the injection of carbon dioxide (CO2) for CO2 capture and storage (CCS) operations, the near-well (including casing, cement, and rock around it) can undergo several thermal loadings. These loadings can significantly ...