CHOICE AND GENERALIZATION OF INTERPRETATION METHODS IN RELATION TO THE SOUTH CASPIAN DEPRESSION

Abstract

Geological structure and bathymetry of the seabed of the deep water part of the Caspian Sea testifies to the formation of significant volumes of gas hydrates. In this regard, it was necessary to study the sedimentary deposits of the Caspian Sea in order to distinguish areas of gas hydrates and evaluate their potential, as well as obtaining new data. A significant volume of data published in scientific journals and reports was analyzed. Much attention was paid to the thermodynamic conditions of gas hydrates formation, as well as the analysis interpretation of geological and geophysical data. Experimental, theoretical and practical data indicates that maximal temperature, at which gas hydrates can be formed on methane is 24 °C. Therefore, an attempt was made to establish the depth at which there is a boundary with temperature in 24 С in the upper part of the section. Gas hydrates zones distinguishing as per data of geophysical methods with determination of BSR boundary or other diagnostic features are considered to be the main diagnostic indicator of gas hydrates. Keywords: gas, seismic investigations, pressure and temperature, BSR