| Инд. авторы: | Novikov D.A., Pyrayev A.N., Chernykh A.V., Dultsev F.F., Ryzhkova S.V. |
| Заглавие: | THE FIRST DATA ON THE ISOTOPIC COMPOSITION OF STRATAL WATERS OF THE DEVELOPED OIL FIELDS IN NOVOSIBIRSK REGION |
| Библ. ссылка: | Novikov D.A., Pyrayev A.N., Chernykh A.V., Dultsev F.F., Ryzhkova S.V. THE FIRST DATA ON THE ISOTOPIC COMPOSITION OF STRATAL WATERS OF THE DEVELOPED OIL FIELDS IN NOVOSIBIRSK REGION // Известия Томского политехнического университета. Инжиниринг георесурсов. - 2021. - Vol.332. - Iss. 2. - P.59-72. - ISSN 2500-1019. - EISSN 2413-1830. |
| Внешние системы: | DOI: 10.18799/24131830/2021/02/3043; WoS: 000624713000005; |
| Реферат: | eng: The relevance of the research lies in solving the issues of isotope geochemistry of groundwater in oil and gas deposits of large artesian basins. The waters of oil and gas bearing sediments of the region under consideration are practically not studied from the point of view of the distribution of stable isotopes delta D, delta O-18, delta C-13 and isotopic ratios Sr-87(86)/Sr and Rb-87/Sr-86. The aim of the research is to identify the features of the genesis of groundwater and the interaction in the "water-rock" system from the standpoint of isotopic geochemistry. Methods. The analysis of the complex of delta D, delta O-18, delta C-13(DIC) of waters and dissolved inorganic carbon was carried out at the Center for Collective Use of the IGM SB RAS using the Isotope Ratio Mass Spectrometer FinniganTM MAT 253. The Sr-87(86)/Sr. Rb-87/Sr-86 isotopic ratios were studied on an MI 1201T mass spectrometer in a two-tape mode with registration on one collector. Results. The authors have studied the stable isotope composition (delta D, delta O-18, delta C-13(DIC)) and isotopic ratios of Sr-87(86)/Sr and Rb-87/Sr-86 of the waters of the developed oil fields of the Novosibirsk region. The hydrogeological section shows the presence of two main genetic types of groundwater: ancient infiltrogenic and sedimentogenic. For most of the studied samples, the delta D-delta O-18 indicates a combination of two determining factors: initial depletion of water in the light isotope O-16 as a result of climatic impact during the period "before disposal" up to 4-5 parts per thousand; further saturation of waters with the heavy isotope O-18 during a long WRI, which led to additional 2-3 parts per thousand of heavier isotopic composition. The delta C-13(DIC) values for a number of samples suggested bacterial origin of dissolved inorganic carbon. There is a clear increase in the delta C-13(DIC) in waters which temperature exceeds 90 degrees C, to the values corresponding to the "normal" ones in thermal waters: from -8 up to +4 parts per thousand VPDB. The waters are characterized by low Sr-87(86)/Sr ratios relative to ocean waters. A significant contribution of mantle sources of strontium is assumed, which manifests itself to different degrees for the waters of various deposits.
|
| Ключевые слова: | DEPOSITS; EVOLUTION; HYDROGEOCHEMISTRY; GEN. NOV.; SOUTHERN AREAS; THERMAL WATERS; SR-87/SR-86 RATIOS; DISSOLVED INORGANIC CARBON; Western Siberia; SYSTEMATICS; oil field; developed pool; interaction in "water-rock" system; isotopic ratios of Sr-87(86)/Sr u Rb-87/Sr-86; delta C-13; delta D; delta O-18; Groundwater; Novosibirsk region; BASIN; |
| Издано: | 2021 |
| Физ. характеристика: | с.59-72 |