Study of elastic-strength properties of low-permeability reservoir rocks in the Verkhnevilyuchanskoye oil and gas field on a true triaxial loading unit.

This article presents the experimental results of studies the mechanical and filtration properties of rocks in the Verkhnevilyuchanskoye oil and gas field, carried out on the unique Triaxial Independent Load Test System (TILTS) of the Institute for Problems in Mechanics of the Russian Academy of Sciences. The methodology of conducting experiments on the TILTS facility for studying elastic and strength characteristics of rocks is described. On the basis of analysis of the results of triaxial tests the elastic characteristics of the samples were obtained: Young's modulus and Poisson's coefficient. The strength characteristics of the studied rocks were determined based on the Coulomb-More theory: coupling modulus and internal friction angle. The permeability evolution dependences during loading of the samples have been obtained. The analysis of experimentally obtained mechanical properties of rocks for mutually orthogonal directions in the rock is carried out. [ABSTRACT FROM AUTHOR]