The experience of AC-CSE-1313 technology at the Priobskoye field

UDK: 622.276.43:678
DOI: 10.24887/0028-2448-2019-4-70-73
Key words: low-permeability reservoir, impact coverage factor, oil displacement factor, filtration tests, oil flow rate, water cut, increment of remaining recoverable reserves
Authors: S.A. Tastemirov (Multifunctional Company ChemServiceEngineering LLC, RF, Moscow), R.N. Fakhretdinov (Multifunctional Company ChemServiceEngineering LLC, RF, Moscow), G.H. Yakimenko (Multifunctional Company ChemServiceEngineering LLC, RF, Moscow), D.Yu. Kolupaev (Gazpromneft-Khantos LLC, RF, Khanty-Mansiysk), M.M. Bikkulov (Gazpromneft-Khantos LLC, RF, Khanty-Mansiysk), A.I. Islamov (Gazpromneft-Khantos LLC, RF, Khanty-Mansiysk)

The characteristic property of the current state of the oilfield development is the reduction in the current oil recovery factor due to low reservoir characteristics, which is ahead of the flooding of the production well stock, and the increment of the decline rate in base production. One way aimed to reduction of the production inequality and the development effectiveness is the use of flow-diverting chemical technologies. The influence mechanism used in the industry of chemical technologies involves the change only the sweep efficiency due to the whole or partial blocking of water flushed zones.

The paper considers the effective solution of the problem of the efficiency gains of development of the low-permeability reservoirs of the Priobskoye field. When choosing the impact technologies, there is to consider also the specifics of the deposit rock - a high content of clay components (10-12%). The use of polymer technologies in the development of the objects being examined leads to an increase in injection pressure, which is not specific for AC-CSE-1313 technology. The considered AC-CSE-1313 technology of conformance control has a complex mechanism of action based on both the conformance factor’s changes and the increase of the oil displacement efficiency. Moreover, according to the filtration tests using the composite different-permeable core models, the average increment of the displacement efficiency made 29.39 - 48.29%, while it was noted that 89% of the average increase of the displacement efficiency made oil, displaced from the low-permeability models. At the Priobskoye field the technology is to apply since 2015 and up to 60-78 well-treatments are carried out annually. As a result of AC-CSE-1313 technology usage the impact areas show the decrease in the decline rate of the base production and the increase of remaining recoverable reserves, that proves the correctness of the method chosen for the efficient reservoir development of the Priobsky field.

References

1. Gimaletdinov R.A., Sidorenko V.V., Fakhretdinov R.N. et al., Criteria for effective application of conformance control technologies under the production climate of Gazprom Neft JSC (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 5, pp. 78–83.

2. Vinokhodov M.A., Yarkeev A.R., Kuznetsov M.A. et al., Technological efficiency of applying the new gelling AC-CSE-1313 technology in oil and gas industry (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 10, pp. 90–94.

3. Kuznetsov M.A., Ishkinov S.M., Kuznetsova T.I. et al., The constantly developed research and production programs of industrial adaptation of injectivity profile leveling technologies for low permeability reservoirs of Slavneft-Megionneftegas OJSC (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 10, pp. 106–110.

4. Fakhretdinov R.N., Yakimenko G.Kh., Sidorov R.V. et al., Novaya proryvnaya tekhnologiya nefteotdachi plastov (New breakthrough oil recovery technology), Proceedings of VI International Scientific and Practical Conference “Prakticheskie aspekty neftepromyslovoy khimii” (Practical aspects of oilfield chemistry), Ufa: Publ. of BashNIPIneftʹ, 2016, pp. 22–23.

5. Kuznetsov M.A., Ishkinov S.M., Kuznetsova T.I. et al., The technology for water shutoff in producing wells (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 7, pp. 58–60.

The characteristic property of the current state of the oilfield development is the reduction in the current oil recovery factor due to low reservoir characteristics, which is ahead of the flooding of the production well stock, and the increment of the decline rate in base production. One way aimed to reduction of the production inequality and the development effectiveness is the use of flow-diverting chemical technologies. The influence mechanism used in the industry of chemical technologies involves the change only the sweep efficiency due to the whole or partial blocking of water flushed zones.

The paper considers the effective solution of the problem of the efficiency gains of development of the low-permeability reservoirs of the Priobskoye field. When choosing the impact technologies, there is to consider also the specifics of the deposit rock - a high content of clay components (10-12%). The use of polymer technologies in the development of the objects being examined leads to an increase in injection pressure, which is not specific for AC-CSE-1313 technology. The considered AC-CSE-1313 technology of conformance control has a complex mechanism of action based on both the conformance factor’s changes and the increase of the oil displacement efficiency. Moreover, according to the filtration tests using the composite different-permeable core models, the average increment of the displacement efficiency made 29.39 - 48.29%, while it was noted that 89% of the average increase of the displacement efficiency made oil, displaced from the low-permeability models. At the Priobskoye field the technology is to apply since 2015 and up to 60-78 well-treatments are carried out annually. As a result of AC-CSE-1313 technology usage the impact areas show the decrease in the decline rate of the base production and the increase of remaining recoverable reserves, that proves the correctness of the method chosen for the efficient reservoir development of the Priobsky field.

References

1. Gimaletdinov R.A., Sidorenko V.V., Fakhretdinov R.N. et al., Criteria for effective application of conformance control technologies under the production climate of Gazprom Neft JSC (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 5, pp. 78–83.

2. Vinokhodov M.A., Yarkeev A.R., Kuznetsov M.A. et al., Technological efficiency of applying the new gelling AC-CSE-1313 technology in oil and gas industry (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 10, pp. 90–94.

3. Kuznetsov M.A., Ishkinov S.M., Kuznetsova T.I. et al., The constantly developed research and production programs of industrial adaptation of injectivity profile leveling technologies for low permeability reservoirs of Slavneft-Megionneftegas OJSC (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 10, pp. 106–110.

4. Fakhretdinov R.N., Yakimenko G.Kh., Sidorov R.V. et al., Novaya proryvnaya tekhnologiya nefteotdachi plastov (New breakthrough oil recovery technology), Proceedings of VI International Scientific and Practical Conference “Prakticheskie aspekty neftepromyslovoy khimii” (Practical aspects of oilfield chemistry), Ufa: Publ. of BashNIPIneftʹ, 2016, pp. 22–23.

5. Kuznetsov M.A., Ishkinov S.M., Kuznetsova T.I. et al., The technology for water shutoff in producing wells (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 7, pp. 58–60.



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