The paper is dedicated to the method of an oilfield geomechanical model construction based on common exploration dataset. Geomechanical modeling can be used to reduce well drilling risks in complicated geological conditions.
Following steps of model construction are described: (a) a construction of mechanical rock properties model; (b) a way to determine rheology, model boundary conditions, external loads and calculate stress state; (c) an evaluation of pore pressures.
Moreover possible methods of improving the model quality are discussed.
It is shown that taking into account the dependence of internal friction angle upon accumulated inelastic strain allows us to obtain more realistic stress-strain curve.
An influence of nonlinear salt creep on the orientation of the principal stress axes is investigated and discussed. As well it is discussed which laboratory core tests should be done to improve the quality of the model.