The article discusses the approbation of an approach based decline analysis to evaluating reservoir pressure in case of low-permeability formation. The formation permeability is less than 2·10-3 μм2. The widespread introduction of the telemetry systems in mechanized oil producing wells and interpretation of the dynamic operation data allow to determinate of reservoir parameters without long-time shut-in. Decline analysis results are used to determinate of the reservoir pressure through synthetic pressure build up curve modeling in the corporate software for well testing RN-VEGA. The examples of the comparison traditional well tests and decline analysis are presented. The approach to reservoir pressure evaluation includes dynamic operation data collection, reservoir parameters determination and modeling of the synthetic pressure build up curve. Comparison of reservoir pressure evaluations through decline analysis and using 3D hydrodynamic model allowed defining the approach application limits. Comparison with traditional well test data also was made. Decline analysis results can be used for factor analysis to reveal main reasons of the wells production levels non-confirmation. The examples of factor analysis are given when as main reasons of the wells production levels non-confirmation authors considered reservoir pressure, bottom hole pressure, productivity index at non-steady/pseudosteady flow of filtration and water flow production.
References
1. Davletbaev A.Ya., Makhota N.A., Nuriev A.Kh. et al., Design and analysis of injection tests during hydraulic fracturing in low-permeability reservoirs using RN-GRID software package (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 10, pp. 77–83, DOI: https://doi.org/10.24887/0028-2448-2018-10-77-83
2. Asalkhuzina G.F., Davletbaev A.Ya., Abdullin R.I. et al., Welltesting for a linear development system in low permeability formation (In Russ.), Neftegazovoe delo, 2021, V. 19, no. 3, pp. 49–58, DOI: 10.17122/ngdelo-2021-3-49-58
3. Kremenetskiy M.I., Ipatov A.I., The longterm monitoring of resevoir data as significant direction of contemporary welltest analysis development (In Russ.), Inzhenernaya praktika, 2012, no. 9, pp. 4–8.
4. Tulenkov S.V., Shirokov A.S., Grandov D.V. et al., Analysis of production data of horizontal oil wells for determination of reservoir flow parameters (In Russ.), Neftyanaya provintsiya, 2019, no. 4(20), pp. 140–156, DOI 10.25689/NP.2019.4.140-15
5. Iktisanov V.A., Sakhabutdinov R.Z., Evaluation of effectiveness of EOR and bottomhole treatment technologies using rate transient analysis (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 5, pp. 72-76, DOI: https://doi.org/10.24887/0028-2448-2019-5-72-7.
6. Zernin A.A., Makarov K.A., Tyul'kova A.I., Features of production geophysical and hydrodynamic research of horizontal multilateral wells in the fields Rosneft Oil Company (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2021, no. 7, pp. 94–98, DOI: https://doi.org/10.24887/0028-2448-2021-7-94-98
7. Urazov R.R., Davletbaev A.Ya., Sinitskiy A.I. et al., Rate transient analysis of fractured horizontal wells (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2020, no. 10, pp. 62–67 , DOI: https://doi.org/10.24887/0028-2448-2020-10-62-67
8. Savel'ev O.Yu., Borodkin A.A., Naugol'nov M.V. et al., Modernized approach to provide block and factor analysis of oil field development system (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 10, pp. 74–77.
9. Naugol'nov M.V., Rastegaeva E.V., Zul'karniev R.Z., Asmandiyarov R.N., Factor analysis of the success of well interventions as a tool for improving the quality of geological and simulation models (In Russ.), PRONEFT''. Professional'no o nefti, 2019, no. 1 (11), pp. 34–38, DOI: 10.24887/2587-7399-2019-1-34-38
10. Asalkhuzina G.F., Davletbaev A.Ya., Khabibullin I.L., Modeling of the reservoir pressure difference between injection and production wells in low permeable reservoirs (In Russ.), Vestnik Bashkirskogo universiteta, 2016, V. 21, no. 3, pp. 537–544.
