The glacial isostatic adjustment of the UK region has been considered in a number of recent studies. We have revisited this problem in order to: (i) highlight some key issues with regard to limitations in the ice modelling approach adopted in these studies and (ii) consider the constraints provided from observations of crustal motion available via continuous global positioning system monitoring. With regard to the first aim, we have found that: (i) previous studies have significantly overestimated ice thicknesses in regions where trim line field constraints were adopted and (ii) the duration of the glaciation phase of the UK ice sheet is a critical aspect of the model and that discrepancies in this model component have led to inconsistent inferences of Earth model parameters. With regard to the second aim, we have found that predictions of horizontal velocities (relative to a chosen site) based on a UK ice model calibrated to fit the regional sea-level database capture the geometry of the signal well but only account for 10% of the magnitude (for a range of Earth models).
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AbstractAs the mechanical devices involved in production become more sophisticated so must the simulation models used to represent their behavior. In the last decade advanced well inflow control devices were developed and installed in real fields [1]. This paper describes the techniques that have been used to model them. Firstly, we introduce the multisegment well model, which is a state-of-the-art technique that allows wells to be modeled with a high level of detail. Next, we show how inflow control devices can be incorporated into the multisegment well model with particular focus on recent extensions for spiral and autonomous inflow control devices. Finally, we conclude with results from an example simulation that illustrate how the model works.
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