НЕФТЯНАЯ ПРОВИНЦИЯ

Abstract

​

Considering the ever-increasing deterioration of the hydrocarbon reserves’ structure as well as decline of the number and, more to the point, the quality (in terms of the recoverable reserves’ amount) of new discoveries, enhanced oil recovery (EOR) methods have acquired great importance. Worthy of separate attention are gas injection EOR technologies, for they do not just increase recovery, but also improve the gas utilization factor.

The efficiency of water-alternating-gas (WAG) process depends on various factors associated with properties of reservoir rocks and fluids. Still, the wettability being responsible for phases’ distribution in the porous space and the reservoir fluid flow, is one of the most important factors. The paper analyzes the effect of wettability on increase of displacement efficiency in WAG processes.

The comparative analysis of results of core flooding experiments on long core samples in water-wet (Suzunskoye oil field) and oil-wet (North-Danilovskoye and Verkhnechonskoye oil fields) conditions is presented.

Key words:

​

wettability, displacement efficiency, water-wet, oil-wet, core sample, core flooding experiment

References

​​

1. Wael Abdullah, J.S. Buckley, A. Carnegie, J. Edwards et al. Fundamentals of wettability. Oilfield Review, 2007. pp. 54-75

2. Zlobin A.A. Vliyanie smachivaemosti porod-kollektorov na koeffitsient izvlecheniya nefti [Impact of reservoir rocks wettability on oil recovery factor]. Neftepromyslovoye Delo [Petroleum Engineering], 2013, No. 9. pp. 49-53 (in Russian)

3. Mikhailov N.N., Motorova K.A., Sechina L.S. Smachivaemost neftegazovykh plastovykh system [Wettability of oil and gas reservoir systems]. Gubkin University Publishing Centre, 2019. (in Russian)

4. Rao D.N., Gas Injection EOR – A New Meaning in the New Millennium, JCPT, Feb. 2001, Vol. 40, No. 2. (in English)

5. Corporate Standard 11-09-2014 Porody gornye. Metodika izmereniy pokazatelya smachivaemosti gornykh porod [Rock formations. Procedure for measurement of wettability of rock formations] (in Russian)

6. Ivanova A.A., Mityurev N.A., Shilobreeva S.N., Cheremisin A.N. Obzor eksperimentalnykh metodov issledovaniya smachivayushchikh svoistv porod neftyanykh kollektorov [Experimental methods for studying wetting properties of oil reservoirs: a review]. Fizika Zemli [Physics of Earth], 2019, No. 3 pp. 135-149 (in Russian)

7. Mikhailov N.N., Semenova N.A., Sechina L.S. Vliyanie mikrostrukturnoi smachivaemosti na petrofizicheskiye kharakteristiki porod-kollektorov [Effect of microstructural wettability on petrophysical characteristics of reservoir rocks]. Karotazhnik [Well Logging], 2011, No. 7. (in Russian).

8. Kobyashev A.V., Zakharenko V.A., Pyatkov A.A., Kochetov A.V., Zagorovskiy A.A., Komisarenko A.S., Dolgov I.A. Sravnenie effektivnosti razlichnykh agentov vozdeistviya (voda, VGV) v geologicheskikh usloviyakh kavernozno-porovogo kollektora plasta B5 Severo-Danilovskogo mestorozhdeniya po dannym laboratornykh eksperimentov [Comparison of efficiency of different agents (water, water-gas) under geological conditions of cavernous-porous reservoir of B5 formation of North-Danilovskoye field by data obtained during laboratory experiments]. Neftepromyslovoye Delo [Petroleum Engineering], 2021, No. 10, pp. 14-22 (in Russian)

9. Putilov I.S., Chizhov D.B., Gurbatova I.P., Nevolin A.I. Osobennosti provedeniya laboratornykh issledovaniy negidrofilnykh porod-kollektorov [Specific features of laboratory studies of non-hydrophilic reservoir rocks]. Inzhiniring Georesursov [Georesources Engineering], 2021, No. 4, pp. 70-79. (in Russian)

10. Kumar S. Burukhin A.A., Cheremisin A.N., Grishin P.A. Smachivaemost karbonatnykh kollektorov: vliyanie flyuidov i starenie [Wettability of carbonate reservoirs: effects of fluid and aging]. SPE-201834-RU, October, 2020.

11. Khizhnyak G.P., Amirov A.M., Mosheva A.M., Melekhin S.V., Chizhov D.B. Vliyanie smachivaemosti na koefficient vytesneniya nefti [Wettability effect on oil displacement efficiency]. Neftegazovoye i Gornoye Delo [Petroleum and Mining Engineering], 2013, No. 6, pp. 54-63 (in Russian)

12. Zakharenko V.A., Kobyashev A.V., Fedorov K.M., Dadakin N.M., Lompik V.A., Dolgov I.A. Prognoz minimalnogo davleniya smesimosti na osnove uravneniy korrelyatsiy i opredelenie optimalnogo komponentnogo sostava dlya dostizheniya smeshivayushchegosya vytesneniya v geologicheskikh usloviyakh mestorozhdeniy Zapadnoi i Vostochnoi Sibiri [Forecast of minimum miscibility pressure based on correlation equations and determination of optimal component composition for achievement of miscible displacement in geological conditions of fields in Western and Eastern Siberia]. Neftepromyslovoye Delo [Petroleum Engineering], 2019, No. 11, pp. 62-68 (in Russian)

​

Authors

​

V.A. Zakharenko, Tyumen Petroleum Research Center

79/1, Osipenko st., Tyumen, 625002, Russian Federation

E-mail: vazakharenko@tnnc.rosneft.ru

 

A.V. Kobyashev, Tyumen Petroleum Research Center

79/1, Osipenko st., Tyumen, 625002, Russian Federation

E-mail: AVKobyashev@tnnc.rosneft.ru

 

A.A. Pyatkov, Ph.D., Tyumen Petroleum Research Center

79/1, Osipenko st., Tyumen, 625002, Russian Federation

E-mail: aapyatkov@tnnc.rosneft.ru

 

K.M. Fedorov, Dr.Sc., Tyumen Petroleum Research Center

79/1, Osipenko st., Tyumen, 625002, Russian Federation

E-mail: kmfedorov@tnnc.rosneft.ru

 

I.A. Dolgov, JSC Verkhnechonskneftegas

3, Bolshoy Liteyny Ave., Irkutsk, 664025, Russian Federation

E-mail: iadolgov@rosneft.ru

For citation:

​

V.A. Zakharenko, A.V. Kobyashev, A.A. Pyatkov, K.M. Fedorov, I.A. Dolgov Jeffektivnost' vodogazovogo vozdejstvija v uslovijah gidrofil'nyh i gidrofobnyh sred po dannym laboratornyh jeksperimentov na sostavnyh kernovyh kolonkah [Efficiency of water-alternating-gas process in water-wet and oil-wet reservoirs by results of core flooding experiments on long core samples]. Neftyanaya Provintsiya, No. 4(28), Part 1, Special issue, 2021. pp. 136-154. DOI https://doi.org/10.25689/NP.2021.4.136-154 (in Russian)