«Geology, geophysics and development of oil and gas fields»

Integrated approach to determination of residual water saturation on the core of non-hydrophilic reservoirs of oil fields in laboratory conditions

UDC: 622.276.031:550.822.3
DOI: 10.33285/2413-5011-2022-5(365)-43-49

Authors:

¹ LUKOIL-Engineering Limited PermNIPIneft Branch Office in Perm, Perm, Russia

Keywords: wettability, core, residual water saturation, reservoir conditions, capillary pressure

Annotation:

The article describes an integrated methodological approach for determining the residual water saturation on core samples of rocks from oil fields, taking into account the features of surface properties (wetting). The integrated approach includes the wettability determination and control at different stages of laboratory research and the use of the improved method for determining the residual water saturation by saturation dependences on capillary pressure in reservoir conditions. The main attention is paid to the rocks of oil reservoirs, which are characterized by a wettability change in the direction of its increase in water (hydrophilization) after the standard preparation of core samples for petrophysical studies using hot extraction in Soxhlet apparatus in an alcohol-benzene mixture. The problematics of research is related to the fact that the results of determining the residual water saturation by regulated laboratory methods on samples with changed wettability can subsequently introduce a significant error in calculating oil reserves.

Bibliography:

1. Amyx J., Bass D., Whiting R. Fizika neftyanogo plasta. – M.: Gostoptekhizdat, 1962. – 568 s.

2. Dobrynin V.M., Vendel’shteyn B.Yu., Kozhevnikov D.A. Petrofizika (fizika gornykh porod). – M.: Izd-vo "Neft’ i gaz" RGU nefti i gaza im. I.M. Gubkina, 2004. – 368 s.

3. Petersil’e V.I., Poroskun V.I., Yatsenko G.G. Metodicheskie rekomendatsii po podschetu geologicheskikh zapasov nefti i gaza ob"emnym metodom. – M.–Tver’: VNIGNI, NPTs "Tver’geofizika", 2003.

4. Khanin A.A. Porody-kollektory nefti i gaza i ikh izuchenie. – M.: Nedra, 1976. – 295 s.

5. OST 39-204-86. Neft’. Metod laboratornogo opredeleniya ostatochnoy vodonasyshchennosti kollektorov nefti i gaza po zavisimosti nasyshchennosti ot kapillyarnogo davleniya. – M.: VNIIOENG, 1986. – 23 s.

6. Tul’bovich B.I. Kollektorskie svoystva i khimiya poverkhnosti produktivnykh porod. – Perm’: Permskoe knizhnoe izd-vo, 1975. – 194 s.

7. Novye predstavleniya o smachivaemosti kollektorov nefti i gaza / N.N. Mikhaylov, I.P. Gurbatova, K.A. Motorova, L.S. Sechina // Neft. khoz-vo. – 2016. – № 7. – S. 80–85.

8. Osobennosti provedeniya laboratornykh issledovaniy negidrofil’nykh porod-kollektorov / I.S. Putilov, D.B. Chizhov, I.P. Gurbatova, A.I. Nevolin // Izv. Tomskogo politekhnich. un-ta. Inzhiniring georesursov. – 2021. – T. 332. – № 4. – S. 70–79.

9. Nevolin A.I., Chizhov D.B. Otsenka ostatochnoy vodonasyshchennosti v sistemakh "voda–gaz" i "neft’–voda" dlya slozhno postroennykh karbonatnykh porod-kollektorov // Problemy razrabotki mestorozhdeniy uglevodorodnykh i rudnykh poleznykh iskopaemykh: materialy XIV Vseros. nauch.-tekhn. konf. (g. Perm’, 9-12 noyabrya 2021 g.). – Perm’–Ekaterinburg: PNIPU, 2021. – S. 41–45.

10. Ekstraktsiya i starenie karbonatnogo kerna devonskikh otlozheniy na mikroskopicheskom masshtabe / K.M. Kovalev, A.Yu. Rashkovskiy, M.M. Khayrullin, P.A. Grishin, V.Ya. Shklover, N.A. Artemov, I.G. Maryasev // SPE–191659–RU. – Ros. neftegazovaya tekhn. konf. SPE. – 2018. – 15 s.

11. Osobennosti izucheniya karbonatnykh porod-kollektorov laboratornymi metodami / I.P. Gurbatova, D.V. Glushkov, P.N. Rekhachev, S.V. Melekhin, N.A. Popov. – Perm’: Filial OOO "LUKOIL–Inzhiniring" "PermNIPIneft’" v g. Permi, 2017. – 264 s.

12. Vremennye metodicheskie rekomendatsii po opredeleniyu koeffitsienta neftenasyshchennosti negidrofil’nykh kollektorov pri podschete zapasov nefti i gaza mestorozhdeniy kompanii PAO "LUKOIL" v Timano-Pechorskoy neftegazonosnoy provintsii / T.F. D’yakonova, V.Yu. Terent’ev, A.D. Saetgaraev, I.P. Gurbatova, E.E. Kristya, L.K. Bata, S.V. Melekhin, D.B. Chizhov, E.V. Pogonishcheva // Nedropol’zovanie XXI vek. – 2021. – № 2. – S. 60–74.

13. McPhee C., Reed J., Zubizarreta Iz. Core Analysis: A Best Practice Guide. – Amsterdam, Netherlands: Elsivier Publ., 2015. – 829 p.

14. Tiab D., Donaldson C.E. Petrophysics: theory and practice of measuring reservoir rock and fluid transport properties. – Elsivier Publ., 2004. – 881 p.

15. Amott E. Observation Relating to the Wettability of Porous Rock Trans // AIME. – 1959. – Vol. 216. – Pp. 156–162.

16. Hopkins P., Puntervold T., Strand S. Preserving initial core wettability during core restoration of carbonate cores // SCA2015-017. – International const. of the Society of Core Analysts. – Canada: St. John Newfoundland and Labrador, 2015. – 12 p.

17. Cuiec L.E. Restoration of the Natural State of Core Samples // SPE 5634. – American Institute of Mining, Metallurgical and Petroleum Engineers, Inc., 1975. – 23 p.

18. Sripal E., James L.A. Application of an optimization method for the restoration of core samples for scal experiments // SCA2017-029. Part II. – International conf. of the Society of Core Analysts. – Austria: Vienna, 2017. – 14 p.