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We demonstrate the use of rock physics inversion for estimating CO₂ saturation and rock frame properties at the Sleipner CO₂ storage pilot in the North Sea. We investigate the relation between rock physics properties and elastic attributes for the Utsira unconsolidated sandstone. An effective fluid...

The TBM tunnelling technique was initially focusing on soft rock environment. As the technique developed towards stronger machines, more powerful motors and larger cutters, hard rock TBM tunnelling became a routine task. Today, there are few ground conditions where the TBM technique is not feasible...

To obtain new experimental results on two-phase flow in fractures, in particular fluid trapping and the interplay of capillary, viscous, and gravity forces in fractures, SINTEF has developed a new transparent flow cell. The cell has a dimension of 60 x 100 cm with a fracture aperture below 1 mm. The...

This work considers regularization of seismic full waveform inversion (FWI), where the sparsity of the underlying model is exploited together with spatial correlations using the so-called anisotropic total variation. The problem is formulated within the Bayesian framework, which provides a...

In permanently abandoned wells, cement plugs serve as a well barrier element that is essential for providing long-term zonal isolation. Poorly plugged wells may provide leakage pathways that pose risks to the surrounding environment. It is well known that the final quality of set cement is...