Multivariate Analysis of the Efficiency of a Waterflooding System using Analytical Techniques

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

Abstract

One of the pressing challenges in oil production is the efficient development of residual reserves to achieve the maximum economic oil recovery factor. To maintain the efficiency of the displacement process in the late stages of development, timely optimization of the waterflooding system is essential. Issues such as uneven reserve recovery, imbalances in the development system, and unproductive injection must also be considered. The Aktashskaya area of the Novo-Yelkhovskoye field is considered. It is characterized by a heterogeneous structure and merging of formations, which creates difficulties in assessing fluid production compensation and identifying unproductive injection. The objective of this paper is to examine various methods for solving this problem: constructing a compensation map based on waterflooding cells and a multivariate compensation calculation. The first method allows for the identification of localized areas with under- or over-compensation of production. The second methodology, based on a multivariate approach, takes into account various parameters such as reservoir conductivity, well spacing, filtration properties, and others, allowing for a more accurate assessment of the impact of injection on production and assisting in targeted planning of reservoir pressure maintenance measures. It has been established that the application of a multivariate analysis of waterflooding system efficiency allows for the identification of areas with unproductive injection. The resulting maps allow for fairly accurate conclusions that correlate with the analysis of specific well performance, demonstrating the direct impact of injection wells on production. These findings are aimed at maintaining optimal reservoir pressure, optimizing filtration flows, and bringing previously under-drained reserves into development by regulating the operating modes of production and injection wells.

Keywords

non-productive injectioncompensation of production lossesreservoir pressure maintenance systemflooding elementszones of reduced reservoir pressurecompensation maps of production lossesmaterial balance method

Bibliography

  1. 1.Revenko V.M. et al. Issledovanie vliiania prevyistosti plasta na koefitsient okhva protessom vytesnenia [Study of the influence of reservoir discontinuity on the sweep efficiency of the displacement process]. Problemy nefti i gaza Tiumeni, 1984, iss. 61, pp. 31-33. Scholar
  2. 2.Bađianov V.A. Metody komp'juternogo modelirovania v zadachakh neftepromyslovoi geologii [Computer modeling methods in oil field geology problems]. 2dn ed. Tiumen': Shadrinskii Dom Pechati, 2011, 184 p. Scholar
  3. 3.Bađianov V.A. ed. al. Sovershenstvovanie sistem razrabotki neftianykh mestorozhdenii Zapadnoi Sibiri [Improving oil field development systems in Western Siberia]. Ed. N.K. Pravednikov. Sverdlovsk: Sredne-Ural'skoe knizhnoe izdatel'stvo, 1975, 175 p. Scholar
  4. 4.Atanov G.A., Vashurkin A.I., Revenko V.M. K voprosu prognozirovania razrabotki neftianykh mestorozhdenii po promyslovym dannym [On the issue of forecasting the development of oil fields based on field data]. Problemy nefti i gaza Tiumeni, 1973, no. 17, pp. 35-37. Scholar
  5. 5.Ignatov I. An Algorithm for Automated Identification of Waterflood Pattern Elements. Abu Dhabi International Petroleum Exhibition & Conference, Nov. 11-14, 2019. Abu Dhabi, 2019, SPE-197126-MS. DOI: 10.2118/197126-MS Scholar
  6. 6.Surguchev M.L., Simkin E.M. Faktory, vliiaushchie na sostoianie ostatnochi nefti v zavodnennykh plastakh [Factors Affecting the State of Residual Oil in Waterflooded Reservoirs]. Neftianoe khoziaistvo, 1988, no. 9, pp. 31-36. Scholar
  7. 7.Surguchev M.L. et al. Metody izvlechenia ostatnochi nefti [Methods for extracting residual oil]. Moscow: Nedra, 1991, 347 p. Scholar
  8. 8.Baziv V.F. et al. Metodicheskie ukazania po geologo-promyslovomu analizu razrabotki neftianykh i gazoneftianykh mestorozhdenii [Guidelines for geological and field analysis of the development of oil and gas fields]. Data vvedenija s 01.03.2002. Moscow: FGU “Ekspertneftegaz”, 2002, 119 p. Scholar
  9. 9.Antonov M.S. Kompensatsionnoe regulirovanie zavodnenia s tsel'iu povyshenia effektivnosti energeticheskogo polia neftianogo plasta [Compensatory regulation of waterflooding to improve the efficiency of the energy field of an oil reservoir]. Abstract of Ph. D. thesis. Ufa, 2011, 24 p. Scholar
  10. 10.Antonov M.S. Optimizatsiia sistemy zavodnenia putem postroeniia kart tekushchei i nakoplennoi kompensatsii na primere kolganskoi tolshchi Vakhitovskogo neftianogo mestorozhdeniia [Optimization of the waterflooding system by constructing maps of current and accumulated compensation using the example of the Kolgan formation of the Vakhitovsky oil field]. Neftepromyslovoe delo, 2011, no. 3, pp. 17-20. Scholar
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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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