Study of factors influencing the efficiency of acid treatments in fields of Eastern Siberia

UDK: 622.276.63

DOI: 10.24887/0028-2448-2025-7-116-120

Key words: carbonate reservoirs, bottom-hole zone, mineralized spacer fluid, acid compositions, intensification of inflow

Authors: I.I. Ryabkov (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); M.A. Kasperovich (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); P.G. Tokmakova (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen);

This article presents a comprehensive analysis of the factors influencing the effectiveness of acid treatments at oil fields in Eastern Siberia. The study examines key parameters such as the compatibility of oil with mineralized spacer fluids and acid compositions, as well as the potential formation of emulsions and their viscosity properties. The article also focuses on the impact of temperature changes in the oil during the transition of gas from a dissolved to a free state, which significantly affects the process end effectiveness of acid treatment. The experiential work was carried out to evaluate the interaction of the components and determine the conditions under which the formation of stable emulsions is minimized, thereby increasing the permeability of the reservoir. An important aspect of the study is the use of surfactants, which help to reduce the negative effects associated with these factors. The results of the study demonstrated that applying selected surfactants improves interactions between acids, oil, and mineralized spacer fluids, as well as stabilizes emulsion viscosity properties. Consequently, implementing these methods increases treatment efficiency, leading to higher well productivity and optimized development of oil fields in Eastern Siberia. These findings are vital for improving technological reliability and economic performance in regional oil extraction operations.

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