Geology, geography and global energy

Scientific and Technical Journal

Inside and between the salt brines Kungur deposits of the Caspian depression

2014. №2, pp. 57-65

Myazina Natalya G. - C. Sc. in Geology and Mineralogy, Associate Professor, Orenburg State University, 13 Pobeda ave., Orenburg, 460018, Russian Federation,;

This article considers examples of salt pools basins of the East European platform. Salt pools in phanerosoic existed in different periods of time from the Cambrian to the Neogene sediments were deposited various chloride brines. In Perm era to the East of the Russian plate was the largest in the history of the Earth: East-European evaporite pool. Accumulation of salt deposits and underground waters and brines happened here in the pool, had a kind of a huge land-locked sea Bay South strike. Chloride magnesium (natrium-magnesium) brines type IIIa (chlorine-magnesium) and weak type IIIB (chlorine-calcium) belong to the category of international and inside salts. Such brines opened not only on the territory of the Lower Volga region, but also in the regions of Northern Caspian Sea region (Orenburg region), the Urals, the Republic of Kazakhstan. Within the North Caspian artesian basin (Volgograd region) describes the main patterns of distribution and formation inside and between the salt chloride brines in the flank zone of Caspian depression. The distinctive feature of this basin is the presence of chloride magnesium sodium-magnesium brines type (IIIA, IIIB). The characteristic of main geochemical and genetic types of brines, considered their Genesis. Is the chemical composition of brines. Area of relict inside and between salt magnesium chloride brines lies in the zone of brines chloride sodium composition - post-salt infiltration and sub-salt diffusion leaching. Brines opened at a depth of 0.9-4.4 km to the librarian of the Svetloyarsk, Tingutinsk, Komsomolskaya, Novonikolaevsk, Demidov, Lobodinskoy areas. In areas salt dome tectonics study of the composition, the structure of Kungur sulphate-halogen strata and host brines contributes discover subsoil plots for use as underground reservoirs in the burial difficult treatment wastewater and for storage of various substances and storage facilities. The impact of brines is important in the construction of wells for underground gas storages and wastes petrochemical complex. For the justification and optimization of exploration and evaluation of hydrogeological conditions at the forecast of oil-bearing must take into account the peculiarities of geological and hydrogeological structure of the salt-dome territories.

Key words: Солеродные бассейны, нижнепермская галогенная формация, рапоносные горизонты, Северо-Каспийский артезианский бассейн, химический состав и минерализация, хлоридные рассолы, Cl-Mg тип, подземный коллектор, Salt pools, lower Perm halogen formation, brine car