Modelling of hydraulic leakage by pressure and stress simulations and implications for Biot's constant: an example from the Halten Terrace, offshore Mid-Norway

摘要

A coupled pressure and stress simulator has been applied to the reservoir sandstone unit, the Middle Jurassic Garn Formation in the Halten Terrace, offshore Mid-Norway, in order to simulate hydraulic fracturing and leakage due to overpressure. The over- and underlying rocks are used as vertical seals to the compartments. The overpressure generation within the pressure compartments was modelled quantifying the mechanical and chemical compaction. An empirical model for the minimum horizontal stress was applied to the Griffith–Coulomb failure criterion to estimate the pressure levels at which hydraulic fracturing occurs.