Improving the efficacy of a downhole pumping well conformance control

UDK: 622.276.432

DOI: 10.24887/0028-2448-2025-7-121-125

Key words: conformance control, downhole pumping, laboratory studies, formulation, study results

Authors: E.V. Sergeeva (SamaraNIPIneft LLC, RF, Samara); V.V. Konovalov (SamaraNIPIneft LLC, RF, Samara); S.V. Vorobiev (International Institute of Professional Education, RF, Samara); D.A. Frolov (Samaraneftegas JSC, RF, Samara); Y.E. Belugina (Samaraneftegas JSC, RF, Samara); N.A. Morozovskiy (Rosneft Oil Company, RF, Moscow)

Currently, there in an increase in a number of injection wells equipped with a downhole liquid pumping systems maintaining the formation pressure. One of the important engineering measures to improve the flooding efficacy is the conformance control (CC), with a special interest of a number of Rosneft Oil Company subsidiaries to «approachless» technologies which do not require withdrawal of the downhole pumping equipment. At the same time, the downhole liquid pumping well design restricts the use of conventional CC technologies without extensive testing or requires the development of new technologies. This work presents the results of development of a CC technology for downhole pumping systems which uses a blend of a sedimentogenic composition with a surfactant. The extensive studies showed that a composition containing sodium organic salts, when interacting with mineralized water, forms a colloidal suspension composed of solid thin particles. The solid phase size distribution depends on the calcium chloride concentration and total water salt content. The composition contains surfactants to keep dispersion phase suspended and prevent the premature sedimentation of colloid particles. The experiments have demonstrated that the composition developed possess adjustable dynamic viscosity and long-term sedimentation stability at different dilution ratios thereby minimizing packer space deposition risks. It is also non-strain-ageing, has an ability to provide an additional filtration resistance and should not have any negative effect on the oil gathering and preparation system.

References

1. Ardalin A.A., Golovacheva E.G., Intra-well formation fluid pumping for reservoir pressure maintenance at Samaraneftegas OGSC (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft’”, 2010, no. 4, pp. 8–11.

2. Amirov A., Ardalin A., Timashev E., Downhole pumping of formation water (In Russ.), Neftegazovaya vertikal’, 2011, no. 11, pp. 80–82.

3. Kozhin V.N., Sergeeva E.V., Cherepanov V.G. et al., An integrated approach to development of a program of measures for levelling the injectivity profile of injection wells on the example of PJSC «Orenburgneft» field (In Russ.), Neftepromyslovoe delo, 2019, no. 4, pp. 8–12, DOI: https://doi.org/10.30713/0207-2351-2019-4(604)-8-12

4. Almaev R.Kh., Safonov E.N., Metody izvlecheniya ostatochnoy nefti na mestorozhdeniyakh Bashkortostana (Methods of extracting residual oil in Bashkortostan fields), Ufa: Publ. of Bashneft’, 1997, 245 p.

5. Baranov Yu.V. et al., The technology of using a fibrous-dispersed system is a new promising means of increasing oil recovery from heterogeneous formations with hard-to-recover oil reserves (In Russ.), Neftepromyslovoe delo, 1995, no. 2–3, pp. 65–71.

6. Gazizov A.Sh., Galaktionova L.A., Geuyuzov A.A., Enhancement of oil recovery at a late stage of field development using polymer-dispersed systems and other chemical reagents (In Russ.), Neftepromyslovoe delo, 1995, no. 2–3, pp. 29–34.

7. Gazizov A.Sh., Muslimov R.Kh., Nauchno-tekhnologicheskie osnovy povysheniya nefteotdachi plastov na mestorozhdeniyakh Tatarstana (Scientific and technological foundations for enhancing oil recovery at Tatarstan fields), Al’met’evsk, 1996, pp. 36–37.

8. Gazizov A.Sh., Nikolaev V.I., Polimerdispersnye kompozitsii dlya povysheniya okhvata plastov vozdeystviem (Polymer-dispersed compositions for increasing the coverage of formations by impact), Collected papers “Sostoyanie i perspektivy rabot v oblasti sozdaniya kompozitsiy PAV dlya povysheniya nefteotdachi plastov” (Status and prospects of work in the field of creating surfactant compositions for enhancing oil recovery), Moscow, 1987, pp. 74–83.

9. Gorbunov A.T., Buchenkov L.N., Shchelochnoe zavodnenie (Alkaline flooding), Moscow: Nedra Publ., 1989, 160 p.

10. Kovaleva G.A., Manyrin V.N., Shvetsov I.A., Primenenie kol’matiruyushchikh sostavov dlya povysheniya koeffitsienta okhvata (Use of colmatation compounds to increase the coverage coefficient), Proceedings of 4th scientific and production conference “Sostoyanie i perspektivy rabot po povysheniyu nefteotdachi plastov” (Status and prospects of work on enhanced oil recovery), Samara, 15–17 June 2000, Samara, 2000, pp. 28–31.

11. Kukin V.V., Shvetsov I.A., Gorbatova A.N. et al., On alignment of the injection well intake profile (In Russ.), Neftepromyslovoe delo, 1967, V. 18, pp. 30–35.

12. Muslimov R.Kh., Gazizov A.Sh., Nauchno-tekhnologicheskie osnovy povysheniya nefteotdachi zavodnennykh kollektorov (Scientific and technological foundations for enhancing oil recovery from flooded reservoirs), Proceedings of meeting “Kontseptsiya razvitiya metodov uvelicheniya nefteizvlecheniya” (Concept of development of methods for increasing oil recovery), Bugul’ma, 27–28 May 1996, Kazan, 1997, pp. 92–115.

13. Patent RU 2066743 C1, Compound for stimulation of oil recovery from formation, Inventors: Altunina L.K., Kuvshinov V.A. et al.

14. Patent RU 2125647 C1, Compound for oil recovery and method of making compound, Inventors: Pozdnyshev G.N., Manyrin V.N. et al.

15. Patent RU 2131513 C1, Composition for shutoff of water inflow in oil wells, Inventors: Abaturov S.V., Ramazanov D.Sh. et al.

16. Patent RU 2167281 C1, Method of nonuniform formation development, Inventors: Shvetsov I.A., Manyrin V.A. et al.

17. Pozdnyshev G.N., Novye emul’sionno-dispersionnye sistemy dlya dobychi nefti na osnove reagenta RDN (New emulsion-dispersion systems for oil production based on RDN reagent), Proceedings of 2nd scientific conference “Sostoyanie i perspektivy rabot po povysheniyu nefteotdachi plastov” (Status and prospects of work on enhanced oil recovery), Samara, 14–16 June 1998, Samara, 1998, pp. 19–22.

18. Red’kin I.I., Laboratornye i promyslovye issledovaniya protsessa kol’matatsii provodyashchikh kanalov porovo-treshchinovatykh kollektorov (Laboratory and field studies of the process of colmatation of conducting channels of porous-fractured reservoirs), Kuybyshev: Publ. of Giprovostokneft’, 1984, pp. 70–77.

19. Tarasyuk A.V., Galantsev I.N., Sukhanov V.N. et al., Gelling compositions for leveling the intake profile and selective isolation of water inflows (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1994, no. 2, pp. 64–68.

20. Shvetsov I.A., Manyrin V.N., Fiziko-khimicheskie metody uvelicheniya nefteotdachi pri zavodnenii (Physical and chemical methods of enhanced oil recovery for water flooding), Samara: Rosing Publ., 2000, 336 p.

21. Ibatullin R.R., Khisametdinov M.R., Gaffarov Sh.K. et al., New technologies of increase in layers sweep by water flooding (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2007, no. 7, pp. 46–49.

22. Gershtanskiy O.S., Intensification of an oil recovery by application of temporarily blocking structures (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2004, no. 9, pp. 96–98.

23. Gorbunov A.T., Petrakov A.M., Kayumov L.Kh.
et al., Application of chemical reagents of Himeko-GANG JSC to enhance oil
recovery and intensify oil production (In Russ.), Neftyanoe khozyaystvo = Oil
Industry, 1997, no. 12, pp. 65–69.