UDC

550.8.023

Authors

Aleksandr V. Yur’ev*
*Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russian Federation)
Corresponding author: Aleksandr Yur’ev, address: Naberezhnaya Severnoy Dviny, 14, Arkhangelsk, 163002, Russian Federation;
e-mail: a.yurjev@narfu.ru

Abstract

The relevance of this article is due to the fact, that there are no documents regulating the petrophysical studies on a whole core. The work objective is to develop recommendations on whole core samples saturation by the most suitable method on the basis of laboratory studies. Core samples with preserved drilling diameter (whole core) were chosen for the research. They were obtained in two wells in the Timan-Pechora oil and gas province. The geometric dimensions of the samples, selected to the collection were 100 mm in diameter and 100 mm in length, as well as with different filtration and reservoir properties and reservoir types. Water saturation of samples was carried out by two methods: under pressureless conditions and under pressure. As a result of the research, optimal regimes for joint and separate evacuation when water saturating of core samples for laboratories with mass flow studies were determined. The use of the underpressure method significantly reduces the saturation time of whole core. The time increment for separate evacuation of dry samples and saturating liquid is more effective than joint evacuation. Carbonate deposits should remain 32 hours under pressureless conditions and 6 hours under pressure for 100 % saturation of whole core samples; terrigenous deposits – 16 and 4 hours, respectively.

Keywords

water saturation of core sample, core sample evacuation, whole core

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