STUDY OF THE COMPOSITION OF NATURAL BITUMEN OF THE PETROBITUMINOUS ROCK OF THE SOUTH-WESTERN ESEKZHAL FIELD

Abstract

This paper presents the study of the organic components of the petrobituminous rock of the South-Western Esekzhal deposit, depending on the depth of the petrobituminous rock and the establishment of the scope of natural bitumen depending on the quality and volume of the output of natural binder. Deposits of petrobituminous rocks of Western Kazakhstan are scattered over a significant area, for example, only in the Zhylyoi district of Atyrau region, near the city of Kulsary, there are more than 20 deposits of petrobituminous rocks. We have compiled a map showing the deposits of these oil-bituminous rocks. From the results of the experimental data obtained, it follows that with an increase in the depth of occurrence of oil-bitumen rocks, a decrease in the molecular weight from 543 to 504 a.m.u is observed. In the elemental composition of natural bitumen of the studied deposit, the carbon content varies from 81.3 to 83.1% by weight, while a clear pattern of dependence of the carbon content on the depth of occurrence has not been established. A similar pattern is observed in terms of hydrogen content (from 9.2 to 11.0% by weight). The sulfur content is from 2.4 to 4.5% by weight. The total nitrogen and oxygen content ranges from 3.2 to 5.1% by weight.