ABSTRACT
A complex approach to studying mechanical and filtration processes has been developing in the Laboratory of Geomechanics of IPMech RAS which includes both experimental and numerical modelling. The approach consists in the following three key stages:
The first stage of the research consists in choosing and developing the proper mechanical model of deformation and seepage, able to describe the key peculiarities:
– influence of pore pressure on deformation;
– nonlinear stress-strain behavior, dependence of yield stress on both shear and comprehensive stress and pore pressure;
– possible inelastic volumetric deformation and its non-trivial dependence on the stress state;
– possible anisotropy of elastic, strength and filtration properties;
– dependence of permeability on stress-strain state.
The second, experimental, stage consists in determining parameters of the model. Experiments are carried out by using the experimental unit Triaxial Independent Loading Test System created at IPMech RAS on cubic specimens (40 × 40 × 40 mm).
The third stage consists in solving the coupled mechanical (determining stress-strain state) and filtration (determining fluid flow and production rate) problem on the base of the chosen model and experimentally obtained parameters.
