Integration of surfactant-polymer technology at the fields of Surgutneftegas PJSC

UDK: 622.276.6

DOI: 10.24887/0028-2448-2026-2-24-30

Key words: surfactant polymer methods for increasing oil recovery, enhanced oil recovery, laboratory studies, injection well, injection volume of the composition

Authors: V.R. Bayramov (Surgutneftegas PJSC, RF, Surgut); V.Y. Mutyev (Surgutneftegas PJSC, RF, Surgut); A.P. Kondakov (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); V.Yu. Ogoreltsev (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); O.G. Narozhny (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); K.V. Kiselev (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen)

Surfactant polymer flooding is widely used as a highly effective method for increasing oil recovery. The article discusses the results of laboratory and field studies of the surfactant polymer compounds use in the fields of Surgutneftegaz PJSC, provides implementation options, and assessment of the feasibility of using these compounds in Surgutneftegaz PJSC. The purpose of the work is to obtain a technological effect of methods to increase oil recovery by injecting surfactant polymer compounds in reservoirs with high permeability. Based on the results of laboratory studies it was noted that an increase in the concentration of polyacrylamide in aqueous solutions (0,1-0,4 %) and the volume of pumping their edges (0,1-4,0 pore volumes Vpor) through reservoir models of the formation X of the field N demonstrates the increase in oil displacement from 0,7 to 8,1 %, the most technically and economically feasible values were obtained using a polymer in the concentration range of 0,2-0,3 %. The additional displacement of residual oil is reached after exposure of polyacrylamide solutions in the amount of (1-2) Vpor. According to flow tests, oil displacement increase (on average by 9,4 %) was revealed after sequential treatment of core columns with polyacrylamide (0,2-0,3 %) and surfactant (3 %), as a result the volume of additional oil recovery increased by 1,3-2,7 times in contrast to the application of each method separately. The results of experimental work indicate that additional volumes of oil production were obtained as a result of the implementation of appropriate geological and technical operations.