Blar i SINTEF Industri på forfatter "Larsen, Idar"
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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, ...