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Petroleum production and CO₂ storage induce effective stress changes and deformations in the reservoir, as well as in the overburden. This may be detected by 4D seismic monitoring due to the stress-sensitivity of the seismic velocities in the rocks. Here we address how stiffness contrast between the...

How to calculate undrained pore-pressure changes according to poroelastic theory A convenient scheme to calculate pore-pressure changes from geomechanical data in low-permeable rocks ...

Norwegian offshore wind farms may be able to supply power to offshore oil and gas platforms in the near future thanks to the expeditious development of offshore wind technology. This would result in a reduction in CO₂ emissions from oil and gas offshore installations, which are currently powered...

Different innovative experimental and numerical methods are presented to assess strategies and cementing materials aiming to improve well cementing, remediation of fractured cement sheaths and permanent well plugging. The work presented here shows that with minor adjustments, current cement...

Fluid saturated rocks exhibit a dependence of acoustic velocities on frequency, which is called velocity dispersion. For some rocks, e.g. shales, velocity dispersion is rather strong and have to be taken into account when interpreting and comparing data from seismic surveys, sonic logs, and...

An Automatic Well Planner (AWP) is used to efficiently adjust pre-determined well paths to honor near-well properties and increase overall production. AWP replicates modern geosteering decision-making where adjustments to pre-programmed well paths are driven by continuous integration of data...

Based on analytic relations, we compute the reflection and transmission responses of a periodically layered medium with a stack of elastic shales and partially saturated sands. The sand layers are considered anelastic (using patchy saturation theory) or elastic (with effective velocity). Using the...