A Study of Elastic Characteristics of Sandstones and Siltstones of Middle Jurassic - The Case of the Severny Berdah Field

Usually for processing of well logging data so called “core-core” dependencies are widely utilized, which are derived from core analysis under atmospheric conditions when no reservoir conditions are taken into account. In this work the practical study of core samples using the high-pressure system AutoLab 1500 (USA KORTEST) has been conducted under conditions, approximate to reservoir conditions. Application of “core-core” dependencies under such conditions has enabled the author to determine P-wave and S-wave propagation velocities, modulus (E), Poisson’s coefficient, shear modulus G, volume compression coefficient. It had an influence on the efficiency and accuracy of the method of quantitative interpretation of sonic logging results, allowed to adjust the data logging and to apply determined elastic characteristics of rocks for designing and optimization of various technical operations in a bore whole, such as hydraulic fracturing.