NATURAL SCIENCES

Journal of fundamental
and
applied researches

Monitoring of underground hydrosphere of Northwest Caspian

2015. №3, pp. 9-18

Bystrova Inna V. - Ph.D. (Geology and Mineralogy), Associate Professor, Astrakhan State University, 1 Shaumyana Sq., Astrakhan, 414000, Russian Federation, tatyana.smirnova@asu.edu.ru

Smirnova Tatiana S. - Ph.D. (Geology and Mineralogy), Associate Professor, Astrakhan State University, 1 Shaumyana Sq., Astrakhan, 414000, Russian Federation, tatyana.smirnova@asu.edu.ru

Rusakova Elena G. - Ph.D. (Biology), Associate Professor, Astrakhan State University, 1 Shaumyana Sq., Astrakhan, 414000, Russian Federation, elenarusakova@rambler.ru

In the Northwest Caspian the increase in volumes geological exploration and activities aimed at increasing the rate of development of existing and newly discovered deposits of hydrocarbons is expected. Directions of exploration related to the monitoring studies on the state of the underground hydrosphere oil and gas fields were determined. Monitoring trends at the local level on the example of above-salt Beshkulskoe oil field and subsalt Astrakhan gas condensate field are considered. Observations since 1983 show that the groundwater level reached absolute marks from minus 22.0 to minus 24.0 m. The ion-salt composition of underground water ranged from 12.4 to 41.8 g/dm . As a result, additional technogenic supply of groundwater changes occurred in the underground hydrosphere within the boundaries of the gas processing plant. The arrival of the water balance of the territory exceeded consumption. Changes have occurred in the hydrodynamic regime and salt content of groundwater. Desalination of groundwater to 0.5-4.4 g/dm is noted.

Key words: углеводороды, загрязнение, техногенез, Бешкульское месторождение, Астраханское газоконденсатное месторождение, гидрохимические методы контроля, гидрохимический режим, верхнепалеозойский водоносный комплекс, геоэкологический мониторинг, солевой состав подз