Abstract
The research results have been obtained with no support in the form of grants of projects. The authors express thanks to PJSC “Ukrnafta” for the possibility to carry out the experiments, which findings are represented by the paper, on the basis of Scientific-Research and Design Institute PJSC “Ukrnafta”.
Highlights
The advanced technique of nitrogen use to improve oil recovery in the context of deep oil deposits has been proposed
It should be noted that chemical methods are recommended for 2500 m wells and thermal methods are recommended for 1000 m covery of deep deposits; among other things, the use of dioxide carbon, carbon, nitrogen, and flue gases is meant (Clancy, Gilchrist, & Kroll, 1981; Mungan, 2000; Indrupskiy, Zakirov, & Kondrat, 2013)
Such an idea prevails that efficiency of flue gas injection into a seam is almost equal to pure nitrogen injection
Summary
Experiments, intended to residual oil displacement with the use of different driving agents, involved laboratory modeling of the process when a seam was simulated as such being close maximally to a real seam and samples of formation fluids were applied. The experiments, which materialized equilibrium displacement (without mass transfer), used seam models developed from cores of V-19n seam (Perekopivske deposit). Characteristics and applicability of nitrogen and flue gas to increase oil recovery have been analyzed. Parameters of mixable oil displacement using nitrogen for the conditions of deep oil deposits of the Dnipro-Donetsk petroleum province in Ukraine have been determined. The advanced technique of nitrogen use to improve oil recovery in the context of deep oil deposits has been proposed. The technique is applicable to extract residual oil from the depleted deposits
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