Field experience of thermotropic compositions application for enhanced oil recovery

UDK: 622.276.6
Key words: enhanced oil recovery (EOR), chemical EOR methods, thermal methods, gels, high-viscosity oils
Authors: I.V. Kuvshinov, V.A. Kuvshinov, L.K. Altunina (Institute of Petroleum Chemistry, Siberian Branch of the RAS, RF Tomsk)

World reserves of heavy and high-viscous oils exceed light and low-viscous reserves several times, and they are the most important part of raw materials base of petroleum industry, both in Russia and in a number of other oil-producing countries in the world. So, the development of high-viscosity oil pools receives increasing attention.

This work presents results of pilot tests of chemical EOR/IOR compositions, developed at Institute of Petroleum Chemistry Siberian Branch of RAS. The tests were held in 2014 on Permian-Carboniс deposit of Usinskoye oilfield. Five different technologies had been tested on 23 producing and 5 injection wells. Significant effect had been obtained at increasing oil production rate and decreasing watercut. By additional oil, effect was up to 800 tons per well, with a duration of effect of up to 9 months. The conclusion is drawn about the prospects of using enhanced recovery technologies for low-productive wells using oil-displacing compositions with controlled viscosity and alkalinity IHN-PRO, as well as acid composition GBK. These compositions are proposed for “cold” intensification of high-viscous oil recovery, as an alternative for thermal methods.

Large-scale industrial application of new technologies for enhanced oil recovery will extend the profitable operation of oilfields in the late stage of development, and oilfields with hard-to-recover hydrocarbon reserves could be involved in the development, including high-viscosity oil fields and deposits of the Arctic region.

References

1. Altunina L.K., Kuvshinov V.A., Physicochemical methods for enhancing oil

recovery from oil fields (In Russ.), Uspekhi khimii = Uspekhi khimii, 2007, V. 76,

no. 10, pp. 1034–1052.

2. Altunina L.K., Kuvshinov V.A., Improved oil recovery of high-viscosity oil pools

with physicochemical methods at thermal-steam treatments, Oil&Gas Science

and Technology, 2008, V. 63, no. 1, pp. 37-48.

3. Altunina L.K., Kuvshinov V.A., Ursegov S.O., Chertenkov M.V., Synergism of

physicochemical and thermal methods intended to improve oil recovery

from high-viscosity oil pools, Proceedings of 16th European Symposium on Improved

Oil Recovery, Cambridge, UK, April 12-14, 2011, CD-ROM, Paper A13.

4. Kuvshinov I., Planning of complex cyclic-steam and physical-chemical

treatment of high-viscosity oil pools, Proceedings of 72nd EAGE Conference

& Exhibition incorporating SPE EUROPEC 2010 Barcelona, Spain, 14 - 17 June

2010.

5. Altunina L., Kuvshinov V., Kuvshinov I., Ursegov S., Kompozitsii dlya

uvelicheniya nefteotdachi zalezhey vysokovyazkikh neftey (Compositions for

enhanced oil recovery of deposits of high-viscosity oil), Oil&Gas Journal Russia,

2012, no. 7, pp. 44 – 51.

6. Altunina L.K., Kuvshinov V.A., Chertenkov M.V., Ursegov S.O., Integrated IOR

technologies for heavy oil pools, Abstract Book of the 21st World Petroleum

Congress, Moscow, June 15-19, 2014, pp. 10-11.

7. Ursegov S.O., Opyt sektornogo termogidrodinamicheskogo modelirovaniya

permo-karbonovoy zalezhi Usinskogo mestorozhdeniya na osnove

realizatsii kompleksnogo podkhoda (Experience in the sector thermohydrodynamic

simulation of Permo-Carboniferous deposit of the Usinsk field

based on an integrated approach), Proceedings of III International Scientific

Symposium “Teoriya i praktika primeneniya metodov uvelicheniya nefteotdachi

plastov” (Theory and practice of EOR), Moscow: Publ. of OAO “VNIIneft'”,

20-21 September, 2011, рр. 37–38.

World reserves of heavy and high-viscous oils exceed light and low-viscous reserves several times, and they are the most important part of raw materials base of petroleum industry, both in Russia and in a number of other oil-producing countries in the world. So, the development of high-viscosity oil pools receives increasing attention.

This work presents results of pilot tests of chemical EOR/IOR compositions, developed at Institute of Petroleum Chemistry Siberian Branch of RAS. The tests were held in 2014 on Permian-Carboniс deposit of Usinskoye oilfield. Five different technologies had been tested on 23 producing and 5 injection wells. Significant effect had been obtained at increasing oil production rate and decreasing watercut. By additional oil, effect was up to 800 tons per well, with a duration of effect of up to 9 months. The conclusion is drawn about the prospects of using enhanced recovery technologies for low-productive wells using oil-displacing compositions with controlled viscosity and alkalinity IHN-PRO, as well as acid composition GBK. These compositions are proposed for “cold” intensification of high-viscous oil recovery, as an alternative for thermal methods.

Large-scale industrial application of new technologies for enhanced oil recovery will extend the profitable operation of oilfields in the late stage of development, and oilfields with hard-to-recover hydrocarbon reserves could be involved in the development, including high-viscosity oil fields and deposits of the Arctic region.

References

1. Altunina L.K., Kuvshinov V.A., Physicochemical methods for enhancing oil

recovery from oil fields (In Russ.), Uspekhi khimii = Uspekhi khimii, 2007, V. 76,

no. 10, pp. 1034–1052.

2. Altunina L.K., Kuvshinov V.A., Improved oil recovery of high-viscosity oil pools

with physicochemical methods at thermal-steam treatments, Oil&Gas Science

and Technology, 2008, V. 63, no. 1, pp. 37-48.

3. Altunina L.K., Kuvshinov V.A., Ursegov S.O., Chertenkov M.V., Synergism of

physicochemical and thermal methods intended to improve oil recovery

from high-viscosity oil pools, Proceedings of 16th European Symposium on Improved

Oil Recovery, Cambridge, UK, April 12-14, 2011, CD-ROM, Paper A13.

4. Kuvshinov I., Planning of complex cyclic-steam and physical-chemical

treatment of high-viscosity oil pools, Proceedings of 72nd EAGE Conference

& Exhibition incorporating SPE EUROPEC 2010 Barcelona, Spain, 14 - 17 June

2010.

5. Altunina L., Kuvshinov V., Kuvshinov I., Ursegov S., Kompozitsii dlya

uvelicheniya nefteotdachi zalezhey vysokovyazkikh neftey (Compositions for

enhanced oil recovery of deposits of high-viscosity oil), Oil&Gas Journal Russia,

2012, no. 7, pp. 44 – 51.

6. Altunina L.K., Kuvshinov V.A., Chertenkov M.V., Ursegov S.O., Integrated IOR

technologies for heavy oil pools, Abstract Book of the 21st World Petroleum

Congress, Moscow, June 15-19, 2014, pp. 10-11.

7. Ursegov S.O., Opyt sektornogo termogidrodinamicheskogo modelirovaniya

permo-karbonovoy zalezhi Usinskogo mestorozhdeniya na osnove

realizatsii kompleksnogo podkhoda (Experience in the sector thermohydrodynamic

simulation of Permo-Carboniferous deposit of the Usinsk field

based on an integrated approach), Proceedings of III International Scientific

Symposium “Teoriya i praktika primeneniya metodov uvelicheniya nefteotdachi

plastov” (Theory and practice of EOR), Moscow: Publ. of OAO “VNIIneft'”,

20-21 September, 2011, рр. 37–38.



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