The main characteristics of water-soluble gases in the Mesocainozoic sediments of the Pre Caspian-Guba oil and gas region

Abstract

Water-soluble gases in the Caspian-Guba oil and gas region began in the 90s of the last century. It was studied under the leadership of F. H. Dadashov and with the direct participation of the author. Gas and water samples were taken and analyzed from the required depths with depth sampling devices (PD-03 and PQM-1000). The isotope composition of the samples was studied at BP in London. Samples from aqueous complexes in Absheron, Productive layer and Cretaceous sediments were analyzed. Based on the results of the analysis, it was found that the gas composition varies depending on the area and depth. In Khudat, Nabran and Khachmaz areas, the gas content of thermomineral waters distributed in the Productive Formation Aquatic Complex and reaching a temperature of 65 °C at the mouth of the well is mainly nitrogen, and in Yalama, Guba and Gusar areas it contains methane. In Mesozoic sediments (Upper Cretaceous), the gas content of thermal waters with a surface temperature of 86 °C is methane. Homologues of this component, as well as the content of nitrogen and carbon components in the total gas content have a relatively low percentage. The thermal waters of this sedimentary complex are chlorinated-sodium due to their hydrochemical composition. Keywords: temperature; sediment; complex; component; composition; thermal waters; gas; methane; chloride; flow.