DETERMINATION OF THE HYDRODYNAMICAL CHARACTERISTICS OF THE ROCKS BY THEIR NATURAL STRESSED-STATE "MEMORY"
A novel method for the determination of the hydrodynamical characteristics of the rocks (on the core adjusted to in situ pressure in the wet/dry pressure chamber) has been proposed. The method is based on the recovery of the natural stressed-state of the rock which occurred in situ from the rock “memory”. The method works by picking up the elastic wave propagation time vs core pore pressure with its loading rate not exceeding the plastic deformation relaxation one, and followed by the subsequent evaluation of a formation hydrofrac pressure, rock yield stress and maximum admissible formation depression.