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World experience of solvents injection for extraction of heavy oil and solvent-based processes potential in TATNEFT PJSC heavy oil fields

UDK: 622.276.5:553.984
DOI: 10.24887/0028-2448-2017-2-78-81
Key words: heavy oil recovery, bitumen, solvent injection process, asphaltenes deposits
Authors: M.R. Yakubov (A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of RAS, RF, Kazan), M.I. Amerkhanov, R.S. Khisamov (Tatneft JSC, RF, Almetyevsk), Yu.V. Khanipova (TatNIPIneft, Bugulma)

Well-known technology of solvent-based recovery of heavy (extra-viscous) oils and bitumens has a number of indisputable advantages. They include the possibility of development of thin oil reservoirs, reduced or zero water consumption, significant decrease in the capital and operating expenditures, and reduction of the overall power consumption up to 85%. The results of the current pilot projects show that this technology is competitive even in conditions of low oil prices. Physical simulation of the oil displacement process in conditions corresponding to the Ashalchinskoye field allows evaluating the applicability of composite solvents based on light aliphatic and aromatic hydrocarbons. It was established that application of the composite solvent based on the light saturate hydrocarbons only leads to deposition of the oil residues enriched with asphaltenes (up to 50-60%) in the pore space. With the increase of proportion of aromatic hydrocarbon (toluene) in the composite solvent, precipitation of asphaltenes is decreased proportionally. Experimental simulation revealed the optimal concentration of aromatic hydrocarbon in the composite solvent based on pentane-hexane fraction for effective displacement of the extra-viscous oil. The velocity of the oil displacement and the volume of recoverable oil are both increased when the amount of asphaltenes deposited in the pore space is decreased. Various synthetic and natural amphiphilic substances behaving as inhibitors of asphaltene deposition process can be used in the composite solvent instead of toluene and other aromatic hydrocarbons.В 

References

1. Rassenfoss S., A tricky tradeoff – can adding a little solvent yield a lot

more heavy crude, JPT, 2012, no. 6, pp. 58–64.

2. Orr B., ES-SAGD: Past, present, and future, SPE 129518, 2009.

3. Boone T., An integrated technology development plan for solventbased

recovery of heavy oil, SPE 150706, 2011.

4. Stark S., Increasing cold lake recovery by adapting steam flood principles

to a bitumen reservoir, SPE 145052, 2011.

5. Gupta S., Gittins S., Semi analytical approach for estimating optimal solvent

use in solvent aided SAGD process, SPE 146671, 2011.

6. Edmunds N., Maini B., Peterson J., Advanced solvent-additive processes

by genetic optimization, JCPT, 2010, no. 49 (09), pp. 34–41.

7. Sharma J., Gates I.D., Dynamics of steam-solvent coupling at the edge

of an ES-SAGD chamber, SPE 128045, 2010.

8. Gates I.D., Design of the injection strategy in expanding-solvent steamassisted

gravity drainage, Proceedings of Second CDEN International

Conference on Design Education, Innovation, and Practice Kananaskis,

Alberta, Canada, 18-20 July 2005.

9. Jamaloei B.Y., Dong M.Z., Mahinpey N., Maini B.B., Enhanced cyclic solvent

process (ECSP) for heavy oil and bitumen recovery in thin reservoirs,

Energy&Fuels, 2012, no. 26(5), pp. 2865–2874.

10. Jiang T., Zeng F., Jia X., Gu Y., An improved solvent-based enhanced

heavy oil recovery method: cyclic production with continuous solvent injection,

Fuel, 2014, no. 115, pp. 268–281.

11. Jia X., Zeng F., Gu Y., Gasflooding-assisted cyclic solvent injection (GACSI)

for enhancing heavy oil recovery, Fuel, 2015, V. 140, pp. 344–353.

12. Yakubov M.R., Borisov D.N., Rakhimova Sh.G. et al., Effect of solvent

composition on heavy oil displacement while modeling (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 2014, no. 10, pp. 106–109.

13. Khisamov R.S., Amerkhanov M.I., Khanipova Yu.V., Change of properties

and composition of heavy oil in the process of Ashalchinskoye field development

by steam-assisted gravity drainage method (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 2015, no. 9, pp. 78–81.

14. Patent no. 2274742 RF, Method for high-viscous oil or bitumen field development,

Inventor: Khisamov R.S.

15. Rakhimova Sh.G., Amerkhanov M.I., Khisamov P.C., Capabilities of petroleum

solvents use in technologies of thermal-steam treatment (In Russ.),

Neftyanoe khozyaystvo = Oil Industry, 2009, no. 2, pp. 34–37. В 

Well-known technology of solvent-based recovery of heavy (extra-viscous) oils and bitumens has a number of indisputable advantages. They include the possibility of development of thin oil reservoirs, reduced or zero water consumption, significant decrease in the capital and operating expenditures, and reduction of the overall power consumption up to 85%. The results of the current pilot projects show that this technology is competitive even in conditions of low oil prices. Physical simulation of the oil displacement process in conditions corresponding to the Ashalchinskoye field allows evaluating the applicability of composite solvents based on light aliphatic and aromatic hydrocarbons. It was established that application of the composite solvent based on the light saturate hydrocarbons only leads to deposition of the oil residues enriched with asphaltenes (up to 50-60%) in the pore space. With the increase of proportion of aromatic hydrocarbon (toluene) in the composite solvent, precipitation of asphaltenes is decreased proportionally. Experimental simulation revealed the optimal concentration of aromatic hydrocarbon in the composite solvent based on pentane-hexane fraction for effective displacement of the extra-viscous oil. The velocity of the oil displacement and the volume of recoverable oil are both increased when the amount of asphaltenes deposited in the pore space is decreased. Various synthetic and natural amphiphilic substances behaving as inhibitors of asphaltene deposition process can be used in the composite solvent instead of toluene and other aromatic hydrocarbons.В 

References

1. Rassenfoss S., A tricky tradeoff – can adding a little solvent yield a lot

more heavy crude, JPT, 2012, no. 6, pp. 58–64.

2. Orr B., ES-SAGD: Past, present, and future, SPE 129518, 2009.

3. Boone T., An integrated technology development plan for solventbased

recovery of heavy oil, SPE 150706, 2011.

4. Stark S., Increasing cold lake recovery by adapting steam flood principles

to a bitumen reservoir, SPE 145052, 2011.

5. Gupta S., Gittins S., Semi analytical approach for estimating optimal solvent

use in solvent aided SAGD process, SPE 146671, 2011.

6. Edmunds N., Maini B., Peterson J., Advanced solvent-additive processes

by genetic optimization, JCPT, 2010, no. 49 (09), pp. 34–41.

7. Sharma J., Gates I.D., Dynamics of steam-solvent coupling at the edge

of an ES-SAGD chamber, SPE 128045, 2010.

8. Gates I.D., Design of the injection strategy in expanding-solvent steamassisted

gravity drainage, Proceedings of Second CDEN International

Conference on Design Education, Innovation, and Practice Kananaskis,

Alberta, Canada, 18-20 July 2005.

9. Jamaloei B.Y., Dong M.Z., Mahinpey N., Maini B.B., Enhanced cyclic solvent

process (ECSP) for heavy oil and bitumen recovery in thin reservoirs,

Energy&Fuels, 2012, no. 26(5), pp. 2865–2874.

10. Jiang T., Zeng F., Jia X., Gu Y., An improved solvent-based enhanced

heavy oil recovery method: cyclic production with continuous solvent injection,

Fuel, 2014, no. 115, pp. 268–281.

11. Jia X., Zeng F., Gu Y., Gasflooding-assisted cyclic solvent injection (GACSI)

for enhancing heavy oil recovery, Fuel, 2015, V. 140, pp. 344–353.

12. Yakubov M.R., Borisov D.N., Rakhimova Sh.G. et al., Effect of solvent

composition on heavy oil displacement while modeling (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 2014, no. 10, pp. 106–109.

13. Khisamov R.S., Amerkhanov M.I., Khanipova Yu.V., Change of properties

and composition of heavy oil in the process of Ashalchinskoye field development

by steam-assisted gravity drainage method (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 2015, no. 9, pp. 78–81.

14. Patent no. 2274742 RF, Method for high-viscous oil or bitumen field development,

Inventor: Khisamov R.S.

15. Rakhimova Sh.G., Amerkhanov M.I., Khisamov P.C., Capabilities of petroleum

solvents use in technologies of thermal-steam treatment (In Russ.),

Neftyanoe khozyaystvo = Oil Industry, 2009, no. 2, pp. 34–37. В 



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