New Russian oil-recovery method for exploiting the Bazhenov Formations deposits

Authors: V.Yu. Alekperov, V.I. Grayfer, N.M. Nikolaev (OAO LUKOIL, RF, Moscow), V.B. Karpov, V.I. Kokorev, R.G. Nurgaliev, A.P. Paliy (RITEK JSC, RF, Moscow), A.A. Bokserman, V.A. Klinchev (Zarubezhneft JSC, RF, Moscow), A.V. Fomkin (VNIIneft OAO, RF, Moscow)

Key words: Bazhenov Formation, thermal-gas treatment, oxygen-containing mixture injection, kerogen, miscible drive, enhanced oil recovery.

In this paper we present new Russian oil-recovery method for exploiting the Bazhenov Formations deposits, which is based on the integration of the thermal and gas reservoir treatment. This method is carried out by the injection of the oxygen-containing mixture and its spontaneous exothermic oxidation reactions in situ. Based on the aggregation of long-term research it was established that such complex treatment, firstly, allows to increase dramatically oil recovery from the drained carbonate hydrophobic interlayers due to the effective displacing agents generation, and secondly, provides bringing into development the non-drained argillaceous-kerogenic interlayers due to their controlled heating from the drained interlayers, and at last thirdly, provides additional hydrocarbon recovery from the kerogen due to its cracking and pyrolysis. The results of the first phase of field tests in the pilot of the Sredne-Nazymskoye field (Bazhenov Formation) not only proved in principle the possibility of the new technologys field implementation, but also confirmed main science-based positive effects of the thermal-gas treatment of the Bazhenov Formations deposits. It is established that this new technology is able to provide the value of oil recovery an order of magnitude greater than the depletion drive.

References
1. Sonich V.P., Baturin Yu.E., Malyshev A.G. et al., Neftyanoe khozyaystvo V Oil Industry, 2001, no. 9, pp. 36-68.
2. Baykov N.M., Baykova E.N., Neftyanoe khozyaystvo V Oil Industry, 2013,
no. 5, pp. 120-123, no. 7, pp. 131-134.
3. 3. Baturin Yu.E., Sonich V.P., Malyshev A.G. et al., Interval, 2002, V. 36, no. 1, pp. 17V32.
4. Sonich V.P., Collected papers Osobennosti podscheta zapasov nefti v
bazhenovskikh otlozheniyakh Zapadnoy Sibiri (Features of calculation of oil
reserves in Western Siberia Bazhenov deposits), Tyumen': Publ. of SibNIINP,
1985, pp. 73-77.
5. Nesterov I.I., Geologiya, geofizika i razrabotka neftyanykh i gazovykh
mestorozhdeniy, 2004, no. 1, pp. 78-{89.
6. Karnyushina E.E., Vestnik Moskovskogo Universiteta. Seriya 4. Geologiya -
Moscow University Geology Bulletin, 2003, no. 6, pp. 19{-27.
7. Slavkin V.S., Alekseev A.D., Koloskov V.N., Neftyanoe khozyaystvo V Oil Industry, 2007, no. 8, pp. 100-{104.
8. Zubkov M.Yu., Geologiya i geofizika V Russian Geology and Geophysics,
1999, V. 40, no. 12, pp. 1821{-1836.
9. Bokserman A.A., Collected papers Teplovye metody vozdeystviya na
plast (Thermal methods of reservoir stimulation), Proceedings of industry
workshop, October 5-8, 1971, Ukhta, Moscow: Publ. of VNIIOENG, 1971,
pp. 10-16.
10. Lopatin N.V., Emets T.P., Geologiya, geofizika i razrabotka neftyanykh
mestorozhdeniy, 1999, no. 7, pp. 2{-17.
11. Vol'f A.A., Petrov A.A., Neftyanoe khozyaystvo V Oil Industry, 2006, no. 4,
pp. 56{-58.
12. Bokserman A.A., Vlasov V.N., Plynin V.V. et al., Neftepromyslovoe delo,
2011, no. 2, pp. 12-15.
13. Kokorev V.I., Neftepromyslovoe delo, 2010, no. 6, pp. 29-32.
14. Bokserman A.A., Grayfer V.I., Kokorev V.I., Chubanov O.V., Interval, 2008,
no. 7, pp. 26-33.
15. Alvarado V, Mandrik E., Metody uvelicheniya nefteotdachi plastov.
Planirovanie i strategii primeneniya (EOR methods. Planning and implementation
strategy), Moscow: Premium inzhiniring, 2011, 244 p.
16. Obzor proektov primeneniya MUN v mire (Overview of EOR projects in the world), Oil & Gas Journal, 2004, no. 4; 2008, no. 4; 2010, no. 4; 2012, no. 4.

Key words: Bazhenov Formation, thermal-gas treatment, oxygen-containing mixture injection, kerogen, miscible drive, enhanced oil recovery.

In this paper we present new Russian oil-recovery method for exploiting the Bazhenov Formations deposits, which is based on the integration of the thermal and gas reservoir treatment. This method is carried out by the injection of the oxygen-containing mixture and its spontaneous exothermic oxidation reactions in situ. Based on the aggregation of long-term research it was established that such complex treatment, firstly, allows to increase dramatically oil recovery from the drained carbonate hydrophobic interlayers due to the effective displacing agents generation, and secondly, provides bringing into development the non-drained argillaceous-kerogenic interlayers due to their controlled heating from the drained interlayers, and at last thirdly, provides additional hydrocarbon recovery from the kerogen due to its cracking and pyrolysis. The results of the first phase of field tests in the pilot of the Sredne-Nazymskoye field (Bazhenov Formation) not only proved in principle the possibility of the new technologys field implementation, but also confirmed main science-based positive effects of the thermal-gas treatment of the Bazhenov Formations deposits. It is established that this new technology is able to provide the value of oil recovery an order of magnitude greater than the depletion drive.

References
1. Sonich V.P., Baturin Yu.E., Malyshev A.G. et al., Neftyanoe khozyaystvo V Oil Industry, 2001, no. 9, pp. 36-68.
2. Baykov N.M., Baykova E.N., Neftyanoe khozyaystvo V Oil Industry, 2013,
no. 5, pp. 120-123, no. 7, pp. 131-134.
3. 3. Baturin Yu.E., Sonich V.P., Malyshev A.G. et al., Interval, 2002, V. 36, no. 1, pp. 17V32.
4. Sonich V.P., Collected papers Osobennosti podscheta zapasov nefti v
bazhenovskikh otlozheniyakh Zapadnoy Sibiri (Features of calculation of oil
reserves in Western Siberia Bazhenov deposits), Tyumen': Publ. of SibNIINP,
1985, pp. 73-77.
5. Nesterov I.I., Geologiya, geofizika i razrabotka neftyanykh i gazovykh
mestorozhdeniy, 2004, no. 1, pp. 78-{89.
6. Karnyushina E.E., Vestnik Moskovskogo Universiteta. Seriya 4. Geologiya -
Moscow University Geology Bulletin, 2003, no. 6, pp. 19{-27.
7. Slavkin V.S., Alekseev A.D., Koloskov V.N., Neftyanoe khozyaystvo V Oil Industry, 2007, no. 8, pp. 100-{104.
8. Zubkov M.Yu., Geologiya i geofizika V Russian Geology and Geophysics,
1999, V. 40, no. 12, pp. 1821{-1836.
9. Bokserman A.A., Collected papers Teplovye metody vozdeystviya na
plast (Thermal methods of reservoir stimulation), Proceedings of industry
workshop, October 5-8, 1971, Ukhta, Moscow: Publ. of VNIIOENG, 1971,
pp. 10-16.
10. Lopatin N.V., Emets T.P., Geologiya, geofizika i razrabotka neftyanykh
mestorozhdeniy, 1999, no. 7, pp. 2{-17.
11. Vol'f A.A., Petrov A.A., Neftyanoe khozyaystvo V Oil Industry, 2006, no. 4,
pp. 56{-58.
12. Bokserman A.A., Vlasov V.N., Plynin V.V. et al., Neftepromyslovoe delo,
2011, no. 2, pp. 12-15.
13. Kokorev V.I., Neftepromyslovoe delo, 2010, no. 6, pp. 29-32.
14. Bokserman A.A., Grayfer V.I., Kokorev V.I., Chubanov O.V., Interval, 2008,
no. 7, pp. 26-33.
15. Alvarado V, Mandrik E., Metody uvelicheniya nefteotdachi plastov.
Planirovanie i strategii primeneniya (EOR methods. Planning and implementation
strategy), Moscow: Premium inzhiniring, 2011, 244 p.
16. Obzor proektov primeneniya MUN v mire (Overview of EOR projects in the world), Oil & Gas Journal, 2004, no. 4; 2008, no. 4; 2010, no. 4; 2012, no. 4.


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