A Study of the Application of Hydrodynamic Technologies for Influencing the Formation at Different Stages of Oil Field Development

Author details
  • TatNIPIneft R&D Institute of the PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation
  • TatNIPIneft R&D Institute of the PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation
  • TatNIPIneft R&D Institute of the PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation
  • PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation
  • TatNIPIneft R&D Institute of the PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation

Abstract

This article presents a comprehensive study and summary of many years of experience in applying hydrodynamic technologies for non-stationary (cyclic) reservoir stimulation to enhance oil recovery at various stages of field development. The paper includes an extensive literature review covering fundamental and modern scientific works on this topic. The theoretical foundations of the method, its evolution, and current status are analyzed. Particular attention is paid to examining various points of view on the physical mechanisms that ensure enhanced oil recovery with cyclic stimulation. The review includes a critical analysis of existing concepts and contradictions in the theoretical justification of the technology. The practical implementation of this technology in a variety of geological and physical conditions at fields in the Republic of Tatarstan is examined. An analysis of the dynamics of oil recovery coefficient changes during the transition from steady-state to non-stationary operation is presented. Particular attention is paid to methods for calculating cycle duration and the optimal amplitude of reservoir pressure fluctuations. Technological aspects of the method's implementation are considered, including the risks and potential complications associated with its application. The authors systematized the factors that had a key impact on the success of transient stimulation based on a literature review. Based on the analysis of a significant array of field data and field test results, detailed criteria for the applicability of the technology for various reservoir types were formulated. The authors transformed stimulation technology appropriately, and oil viscosity, rate, while injecting gases, were considered. The reservoir type, wettability, hydrodynamic connection (water cut, reserve depletion rate). Development stage and key performance indicators are provided, demonstrating an increase in oil recovery of 1.8-10% depending on the geological and physical characteristics of the reservoir. The economic aspects of cyclic flooding are analyzed, demonstrating its high profitability even in the late stages of development. A conclusion has been reached regarding the rapid decline of transient stimulation methods for increasing oil recovery factors in layered, heterogeneous reservoirs, particularly in the late stages of production, when traditional flooding methods become ineffective. The developed practical recommendations enable optimization of the technology's application for specific geological and technological conditions and maximize ultimate oil recovery.

Keywords

non-stationary impactcriteria for the applicability of non-stationary impact technologynon-stationary injectionpulsed impactnon-stationary drainage modeelastic modenon-stationary forced extraction

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Article information

Published
21 November 2025
Issue date
21 November 2025
Issue
Vol. 25, No. 4 (2025)
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