Compaction- and Shear-Induced Well Deformation in Tyra: Geomechanics for Impact on Production

An offshore reservoir monitoring system based on fibre-optic distributed sensing of seabed strains

“…Often, reservoir compaction is translated into seabed subsidence, which has a direct adverse effect on production facilities. In the case of the Tyra gas field, for example, the maximum observed subsidence due to production reached approximately five metres (Schutjens et al 2019). To a lesser extent, seabed subsidence is also observed in oil fields such as Dan (Hatchell et al 2007).…”

“…Many of the Danish gas fields in the North Sea are produced by natural depletion with gas/fluid expulsion and related compaction as drivers (Hatchell et al 2007;Danish Energy Agency 2013;Calvert et al 2014;Schutjens et al 2019). Often, reservoir compaction is translated into seabed subsidence, which has a direct adverse effect on production facilities.…”

Effects of Porosity and Water Saturation on the Yield Surface of Upper Cretaceous Reservoir Chalks From the Danish North Sea

“…One of the most known and studied consequences of these in situ changes is the compaction of chalk reservoirs in the North Sea, first observed in the Ekofisk field and associated with almost 4 m seafloor subsidence (Boade et al., 1989). Wellbore instability and fault reactivation are two additional consequences of reservoir, sideburden, and overburden deformation that can jeopardize the integrity of oil and gas infrastructures and, ultimately, the economic viability of fields (Schutjens et al., 2018). Besides, the efficiency of stimulation methods such as radial jet drilling and the interpretation of time‐lapse seismic are dependent on changes in mechanical properties associated with compaction (Angus et al., 2015; Medetbekova et al., 2020).…”