Geology, geography and global energy

Scientific and Technical Journal

Comparative Hydrochemical Analysis of Oil and Gas Field Deposit Waters within the Bounds of Large Geostuctural Elements

2012. №4, pp. 36-44

Navrotskiy Oleg K. - D.Sc. in Geology and Mineralogy, Federal State Unitary Enterprise of the Nizhne-Volzhskiy Research Institute of Geology and Geophysics, 70 Moskovskaya st., Saratov, Russian Federation, 410012, nitaran@mail.ru

Dotsenko Anton M. - Student, Saratov State University, 83 Astrakhanskaya st., Saratov, Russian Federation, 410012, gidrogeologant@mail.ru

Loginova Marina P. - C.Sc. in Geology and Mineralogy, Saratov State University, 83 Astrakhanskaya st., Saratov, Russian Federation, 410012, Loginovamp@info.sgu.ru

Brichikov Nikolay G. - Student, Saratov State University, 83 Astrakhanskaya st., Saratov, Russian Federation, 410012, captain89@rambler.ru

The article deals with problems related to the formation of reservoir-based oil and gas fields in Saratov region. It adds that the fields’ major elements are characterized by a specific geo-structural and hydro-chemical composition associated with water formation. The paper relates that the water reservoirs formed during the Devonian age exhibit completed metamorphic processes, while those formed during the Carboniferous age exhibit processes that have not yet been completed. Subsequently, the critique notes that hydro-chemical studies of deep reservoir layers of water underlying hydrocarbon deposits have raised questions that are difficult to answer, even with the assistance of a large analytical database. These studies have revealed testbeds located in flowing waters, hydro-chemical layers of a different age, and co-existence in a single layer of deep aquifer water calcium chloride and bicarbonate types. The investigations have also unveiled changes affecting the hydro-chemical characteristics of the reservoir in overall space, the depth and temperature metamorphism of the water (in a single license area), and other materials. The research paper notes that V.I. Nikitinoy (HB NIIGG, Saratov, 1973) has assessed the chemical characteristics of hydro-carbons in formation water in the Saratov region. The most extensive hydro-chemical analysis has covered the three major geo-structural regions: the Saratov region, Karamyshskoy plain and Stepnovsky complex shaft.

Key words: large geo-structural elements,correlation index,metamorphosed index of deposit waters,deposit water type,hydro-chemical background,paragenetic sequence,oil and gas

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