Sivtsev A.I.

maraday@yandex.ru



Graduated from Yakutsk State University (1998), specialization "geophysical methods of prospecting and exploration of mineral deposits".
PhD in geology and mineralogy.
Leading specialist in the resource base sector, reserves audit of LLC Taas-Yuryakh Neftegazodobycha.
Area of scientific interest: geology of oil and gas, development of oil and gas fields.
Author of more than 80 publications.
Geochemical research
Section editor – PhD in geology and mineralogy Bazhenova T.K.
Article # 30_2020 submitted on 12/27/2019 displayed on website on 09/23/2020
20 p.
pdf Features of the brine water composition of the Vendian - Lower Cambrian Middle Botuoba oil-gas-condensate field during the catagenesis time
The salt water omposition of underground brines of the Vendian - Lower Cambrian sections of the Middle Botuoba oil-gas-condensate field during the catagenesis stage is considered; the peculiarity of which is the presence of polygenic waters in certain block traps of B5 and Б1 levels: sodium sulfate, sodium hydrogencarbonate and chlorine-magnesium genetic types together with the prevailing chlorine-calcium genetic type. The zoning of the groundwater of the strata by mineralization and four genetic types of groundwater has been carried out. The directions of water entry into the reservoirs formed at the stage of catagenesis and entering together with hydrocarbons in the corresponding traps are established. It is shown that, while maintaining the mechanism of formation of the salt water composition in the "rock-water" system, the polygenicity of the formation waters present simultaneously in one reservoir layer reflects a regular change in the components of their chemical composition during the transition from the artesian basin to the oil and gas basin. The most sensitive ions of the chemical composition of groundwater, reflecting the transition of the artesian basin to the new geological state of the catagenesis stage, are sulfate, bicarbonate, and sodium ions.

Keywords: groundwater, ion-salt water composition, rock-water system, water genetic types, polygenic water, hydrochemical inversion, Middle Botuoba oil-gas-condensate field.
article citation Chistyakova N.F. Dravante V.V., Sivtsev A.I. Osobennosti ionno-solevogo sostava podzemnykh vod vend-nizhnekembriyskikh otlozheniy Srednebotuobinskogo neftegazokondensatnogo mestorozhdeniya na stadii katageneza [Features of the brine water composition of the Vendian - Lower Cambrian Middle Botuoba oil-gas-condensate field during the catagenesis time]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 3, available at: http://www.ngtp.ru/rub/2020/30_2020.html
DOI https://doi.org/10.17353/2070-5379/30_2020
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Regional petroleum geology
Section editor – PhD in geology and mineralogy Makarevich V.N.
Article # 42_2018 submitted on 10/04/2018 displayed on website on 11/30/2018
16 p.
pdf Studying the possibility of hydratе formation and salt deposition in the bottom hole of wells of Chayanda oil-gas-condensate field
The actual problems of development of the Chayanda oil-gas-condensate field, related to the features of the geological characteristics of productive horizons and reservoir fluids, are considered. To compile recommendations for reducing the risks of natural gas production, the probability of hydrate formation and salt depositions is estimated using the example of the botuobinsky productive horizon.
The equilibrium conditions of hydrate formation are calculated based on the physicochemical properties of formation fluids. It is concluded that in the development and exploitation of the Chayanda oil-gas-condensate field due to an abnormally low reservoir temperature, in spite of the high mineralization of the formation water, it is possible to form gas hydrates. The minimum concentrations of a calcium chloride solution and a water-methanol solution that prevent hydrate formation at a characteristic reservoir temperature are determined. It is established that an increase in the mineralization of calcium chloride solutions leads to the concentration in the clathrate phase of C2-C4 hydrocarbons and to an increase the fat coefficient of gas. It is shown that mixing of highly mineralized formation waters with a water-methanol solution can lead to salt depositions in the bottom hole zone of wells.

Keywords: natural gas, hydrate formation, stratum water, mineralization, water-methanol solution, salt deposition, Chayanda oil-gas-condensate field, Nepа-Botuoba anteclise.
article citation Kalacheva L.P., Rozhin I.I., Sivtsev A.I. Izuchenie vozmozhnosti gidratoobrazovaniya i soleotlozheniya v prizaboynoy zone skvazhin Chayandinskogo neftegazokondensatnogo mestorozhdeniya [Studying the possibility of hydratе formation and salt deposition in the bottom hole of wells of Chayanda oil-gas-condensate field]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 4, available at: http://www.ngtp.ru/rub/2018/42_2018.html
DOI https://doi.org/10.17353/2070-5379/42_2018
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Geochemical research
Section editor – PhD in geology and mineralogy Bazhenova T.K.
Article # 23_2017 submitted on 05/22/2017 displayed on website on 06/30/2017
16 p.
pdf  Gas geochemical survey of aromatic hydrocarbons related to the oil and gas prospecting activity on the northern slope of the Yakut Arch
Prospects assessment of the oil and gas belonging to the Yakut Arch of the Siberian Platform are still not fully interpreted. But, in relation of new data and reevaluation of old interpretation, this region begins to be of interest, particularly, the northern slope of the arch. Gas geochemical survey was performed on two profiles on aromatic hydrocarbons content within this zone. Identification of a differentiated geochemical area, comparable with data obtained during reconnaissance works within Sredne Viluy field obtained. Sources of hydrocarbon migration are assumed, according to the primary data interpretation.

Keywords: gas geochemical survey, aromatic hydrocarbons, prospects of oil and gas presence, Yakut Arch, Siberian Platform.
article citation Kalinin A.I., Sivtsev A.I. Pryamye gazogeokhimicheskie poiski aromaticheskikh uglevodorodov v svete perspektiv neftegazonosnosti severnogo sklona Yakutskogo podnyatiya [Gas geochemical survey of aromatic hydrocarbons related to the oil and gas prospecting activity on the northern slope of the Yakut Arch]. Neftegazovaya Geologiya. Teoriya I Praktika, 2017, vol. 12, no. 2, available at: http://www.ngtp.ru/rub/1/23_2017.pdf
DOI https://doi.org/10.17353/2070-5379/23_2017
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