Tensor compaction of porous rocks: theory and experimental verification

Compaction in sedimentary basins has been traditionally regarded as a one-dimensional process that ignores inelastic deformation directions orthogonal to the active load. This study presents new experiments with sandstone demonstrating role of three-dimensional compaction cyclic true triaxial compression. The were carried out on basis independent loading test system Laboratory Geomechanics Ishlinsky Institute for Problems Mechanics Russian Academy Science. elastic moduli material estimated from stress-strain curves and deformations sample each three determined. Subtracting component total allowed show is observed direction loading, whereas there expansion material. To describe nature compaction, generalization Athy law tensor case proposed, taking into account stress deviator. kinetic equation evolution deformation, starting moment load application are introduced. On multiaxial compression sandstone, identification verification constructed model out. possibility not only qualitative, but also quantitative description changes under complex shown.