Combined gas and chemical technology for increasing oil recovery (Low Tension Gas)

UDK: 622.276.6

DOI: 10.24887/0028-2448-2025-9-49-55

Key words: associated gas, gas and gas-chemical methods of increasing oil recovery, surfactants

Authors: P.N. Belovus (Gazprom Neft Companу Group, RF, Saint Petersburg); M.V. Zvada (Gazprom Neft Companу Group, RF, Saint Petersburg); A.V. Penigin (Gazprom Neft Companу Group, RF, Saint Petersburg); I.V. Kovalenko (Gazprom Neft Companу Group, RF, Saint Petersburg); A.V. Voyvodyanu (Gazprom Neft Companу Group, RF, Saint Petersburg); V.I. Virt (Gazprom Neft Companу Group, RF, Saint Petersburg); D.M. Kolesnikov (Gazprom Neft Companу Group, RF, Saint Petersburg); V.V. Ilikbaev (Gazprom Neft Companу Group, RF, Saint Petersburg)

The article is devoted to the development of contact deposits of oil fringes, which is often complicated by high heterogeneity of reservoir properties, as well as an unfavorable ratio of fluid mobility of water- and gas-bearing horizons relative to oil. These features of the objects lead to the risks of premature disintegration of the fringe, breakthrough of non-targeted fluids to production wells, reduction of the coefficients of coverage and displacement, and, as a result, low efficiency of the final development of reserves. At the same time, the development of sub-gas deposits requires the search for effective ways to utilize or benefit from significant volumes of associated gas, given the limited markets, transportation infrastructure, and distance of the deposit from major consumers.

This paper provides a review of gas and gas-chemical methods for increasing oil recovery in order to increase the production of liquid hydrocarbons and increase the share of useful use of associated gas. The paper analyzes the applicability of these methods for one of the Gazprom Neft's oil and gas condensate fields (field N), proposes a promising Low Tension Gas (LTG) technology which combines the effects of residual oil mobilization by reducing the interfacial tension and controlling the mobility of the displacement agent by creating stable foam in a porous medium.

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