Geochemical research
Section editor – PhD in geology and mineralogy Bazhenova T.K.
Article # 27_2017 submitted on 07/28/2017 displayed on website on 08/29/2017
21 p.
pdf  Fluid type determination for oil and gas fields in the southern Denisov Depression (Timan-Pechora Province)
A number of large-, medium- and small-sized oil and gas-condensate fields has been discovered in the Denisov Depression of the Timan-Pechora Basin. Moreover, there is a long list of drillable prospects in the area. Quite often, some wells in this area produce oil while other wells, nearby and with identical hypsometric conditions, produce gas. An integrated model explaining this phenomenon and allowing the prediction of fluid type for future fields has not been developed to date. To solve this specified problem, genetic prerequisites for oil and gas field formation in the area have been studied carefully. Well testing and fluid sampling conditions have been thoroughly examined. Data on the composition of liquid and gaseous components of reservoir hydrocarbon systems have been analyzed. Interpreted modeling of fluid type in discovered fields has been performed. As a result, for the first time in the Timan-Pechora Province volatile oils have been identified. They have been characterized in comparison with oils. An alternative model for fluid type in some previously discovered fields has been proposed. Optimum conditions for well testing and fluid sampling in the southern Denisov Depression have been suggested.

Keywords: deep buried deposits, volatile oil, gas condensate, gas-oil ratio, hydrocarbon composition, Denisov Depression, Timan-Pechora Province.
article citation Senin S.V., Savelyeva A.A. Diagnostika fazovogo sostava zalezhey uglevodorodov yuzhnoy chasti Denisovskogo progiba [Fluid type determination for oil and gas fields in the southern Denisov Depression (Timan-Pechora Province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2017, vol. 12, no. 3, available at: http://www.ngtp.ru/rub/1/27_2017.pdf
DOI https://doi.org/10.17353/2070-5379/27_2017
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