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This article presents the results of a series of experiments on physical modeling of mechanical and filtration processes occurring in productive formations of Verkhnevilyuchanskoye oil and gas field when implementing the method of directional unloading of the reservoir (DUR). The experiments were carried out on the unique Triaxial Independent Load Test System of the Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences. The dependence of filtration properties of the studied rock specimens on the type of stress–strain state is presented in the work, and the values of pressure drawdown which can lead to an increase of rocks permeability under a certain bottomhole design are determined. In order to analyze the change in the internal structure of rock specimens and to estimate their ultimate fracture permeability after geomechanical testing, complementary studies were performed using a ProCon CT-MINI high-resolution X-ray scanner. The obtained results indicate that the DUR method can be successfully applied to wells drilled in the Verkhnevilyuchanskoye oil and gas field.

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Experimental Study of Mechanical and Filtration Processes in Low-Permeability Reservoir Rocks of Verkhnevilyuchanskoye Oil and Gas Condensate Field at Implementation the Method of Directional Unloading of the Reservoir

  • 会议论文

  • 发表日期：

    2026年

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  • Yury Kovalenko,
  • Svyatoslav Barkov,
  • Valerii Khimulia

摘要

This article presents the results of a series of experiments on physical modeling of mechanical and filtration processes occurring in productive formations of Verkhnevilyuchanskoye oil and gas field when implementing the method of directional unloading of the reservoir (DUR). The experiments were carried out on the unique Triaxial Independent Load Test System of the Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences. The dependence of filtration properties of the studied rock specimens on the type of stress–strain state is presented in the work, and the values of pressure drawdown which can lead to an increase of rocks permeability under a certain bottomhole design are determined. In order to analyze the change in the internal structure of rock specimens and to estimate their ultimate fracture permeability after geomechanical testing, complementary studies were performed using a ProCon CT-MINI high-resolution X-ray scanner. The obtained results indicate that the DUR method can be successfully applied to wells drilled in the Verkhnevilyuchanskoye oil and gas field.