Geology, geography and global energy

Scientific and Technical Journal

Hydrochemical characteristics of oil-and-gas technogenesis on the Karchagin oil-and-gas condensate field

2017. 3, pp. 65-77

Isaeva Gyulnara Yu. - C.Sc. in Engineering, Researcher, Oil and Gas Research Institute, Russian Academy of Science, 3 Gubkina st., Moscow, 119333, Russian Federation

Anisimov Leonid A. - D.Sc. in Geology and Mineralogy, Leading Researcher, Branch of Ltd. “LUKOIL-Engineering Branch” “VolgogradNIPImorneft”, 10 Sovetskaya st., Volgograd, 400131, Russian Federation

Vorontsova Irina V. - C.Sc. in Geology and Mineralogy, Branch of Ltd. “LUKOIL-Engineering Branch” “VolgogradNIPImorneft”, 10 Sovetskaya st., Volgograd, 400131, Russian Federation

Sapharova Elizaveta A. - post-graduate student, Oil and Gas Research Institute, Russian Academy of Science, 3 Gubkina st., Moscow, 119333, Russian Federation

The following article considers hydro-chemical conditions of the Paleogene, Lower Cretaceous and Upper Jurassic deposits of the Shell-Latitudinal shaft of the northern part of the Caspian Sea. The possibility to use the data on the hydro chemical testing of the productive deposit of Yu. Korchagin oilfield for identifying reservoir, technological as well as condensation waters in the mixtures of associated liquids entering production wells is stated. Тhe ability of high resolution when forecasting genetic profile of associated waters have such indicators as TDS, the content of bromine, pH, as well as number of hydrochemical coefficients (sodium-chlorine, chlorine-bromine, calcium-sodium, calcium-magnesium and hydrocarbonate-calcium-magnesium). Attention is drawn to the use of calculations of the saturation of water with carbonate and sulfate calcium to determine the degree of disturbance of the geochemical equilibrium in the reservoir system and the aftermath of the injection of the technological fluids into the reservoir.

Key words: , , , , chemical composition of the formation waters, carbonate balance, genetic indices, hydrochemical control

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