Browsing SINTEF Open by Author "Holt, Rune Martin"
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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, ... -
The impact of saturation on seismic dispersion in shales — Laboratory measurements
Szewczyk, Dawid; Holt, Rune Martin; Bauer, Andreas (Peer reviewed; Journal article, 2018)Previous studies found a significant increase of acoustic velocities between seismic and ultrasonic frequencies (seismic dispersion) for shales, which would have to be taken into account when comparing seismic or sonic ... -
Offset dependence of overburden time-shifts from ultrasonic data
Bakk, Audun; Holt, Rune Martin; Bauer, Andreas; Dupuy, Bastien; Romdhane, Mohamed Anouar (Peer reviewed; Journal article, 2020)Depletion or injection into a reservoir implies stress changes and strains in the reservoir and its surroundings. This may lead to measurable time-shifts for seismic waves propagating in the subsurface. To better understand ... -
Rock physics model of shale: Predictive aspect
Asaka, Michinori; Holt, Rune Martin; Bakk, Audun (Peer reviewed; Journal article, 2021)Shales often show strong elastic anisotropy that originate from the alignment and platy nature of its constituent minerals. Despite its impact on AVO (Amplitude Variation with Offset) response and seismic time-shifts, ...