Evaluating efficiency of wave stimulation technologies at Tatneft PJSC oil assets

UDK: 622.276.6 Пр.М.
DOI: 10.24887/0028-2448-2021-1-38-43
Key words: oil, wave stimulation, enhanced oil recovery (EOR), rate transient analysis (RTA), evaluation of effect, field tests
Authors: V.A. Iktissanov (TatNIPIneft, RF, Bugulma), R.Z. Sakhabutdinov (TatNIPIneft, RF, Bugulma), A.T. Zaripov (TatNIPIneft, RF, Bugulma), M.M. (TatNIPIneft, RF, Bugulma) N.Kh. Musabirova (TatNIPIneft, RF, Bugulma), A.V. Baigushev (TatNIPIneft, RF, Bugulma)

Wave stimulation techniques to enhance oil recovery and/or remove formation damage in the near wellbore zone have been attracting interest in oil industry practice in recent years. It is known from literature that the technique has been successful in some cases, however, to-date, there are several controversial and inconclusive issues about the technology. The main point at issue is the physical mechanism of the wave stimulation process and its effect on different reservoir rocks. To gain greater insight into the process and to evaluate the efficiency of the wave stimulation technique in carbonate and sandstone reservoirs, Tatneft PJSC has carried out a wide-scale field experiment in the own producing assets. The experiment was carried out over a period of two years involving 23 wells on three pilot blocks. The wells adjacent to those with the waves’ generators were equipped with downhole gauges to measure pressure, production rate (or injectivity), and water cut of the wellstream. The field experiment comprised two stages: acquisition and analysis of production and injection wells’ data in absence of wave stimulation, and the same after starting and operation of generators. Reservoir flow capacity, viscosity and density of degassed oil at both stages were analyzed. To evaluate the effect of wave stimulation, the RTA (Rate Transient Analysis) provided by the Kappa Topaze software was applied instead of the commonly used DCA (Decline Curve Analysis) approach. Change in production rate after wave stimulation was used as the main criterion. Algorithm of determination of this parameter based on interpretation results was offered. The field experiment yielded the following results: in the Kynovskian-Pashiyan reservoirs with high water cut, oil production rates increased by some 6%; in addition, a significant increase in degassed oil viscosity was recorded suggesting that the by-passed oil was mobilized. In the Tournaisian reservoirs with low water cut developed at low borehole pressure, production rates did not change. Comparative analysis of pressure buildup curves did not show a somewhat pronounced change in the reservoir flow capacity.

References

1. Napol'skaya R.N., A promising technologies for stimulation of oil based on the wave phenomena (In Russ.), Neftegazovye tekhnologii i novye materialy. Problemy i resheniya, 2018, no. 7(12), pp. 168–174.

2. Dubinskiy G.S., Chibisov A.V., Ganiev O.R. et al., Planning of technologies for stimulation wells and enhance in oil recovery with use of wave processes and the resonance in productive layers (In Russ.), Neftegazovye tekhnologii i novye materialy. Problemy i resheniya, 2016, no. 5 (10), pp. 186–196.

3. Ganiev O.R., Ganiev R.F., Ukrainskiy L.E., Rezonansnaya makro- i mikromekhanika neftyanogo plasta. Intensifikatsiya dobychi nefti i povysheniya nefteotdachi. Nauka i praktika (Resonant macro- and micromechanics of an oil reservoir. Enhanced oil production and enhanced oil recovery. Science and practice), Moscow – Izhevsk: Institute of the computer science, 2014, 256 p.

4. Kuznetsov O.L., Dyblenko V.P., Sharifullin R.Ya., Tufanov I.A., Innovatsionnye volnovye tekhnologii i ikh ispol'zovanie dlya povysheniya effektivnosti razrabotki neftegazovykh mestorozhdeniy (Innovative wave technologies and their use to improve the efficiency of oil and gas field development), Collected papers “Elastic wave effect on fluid in porous media, Proceedings of III International conference, Moscow, 2012, pp. 4–7.

5. Barabanov V.L., Nikolaev A.V., Problema spektra dominantnykh chastot pri seysmicheskom vozdeystvii na neftyanye zalezhi (The problem of the spectrum of dominant frequencies during seismic impact on oil deposits), Collected papers “Elastic wave effect on fluid in porous media, Proceedings of III International conference, Moscow, 2012, pp. 30–33.

6. Barskaya E., Tukhvatullina A., Ganeeva Y., Yudupova T., Influence of ultrasonication on the dispersed structure of the crude oils, Collected papers “Elastic wave effect on fluid in porous media, Proceedings of III International conference, Moscow, 2012, pp.39–42.

7. Svalov A.M., Conditions of effective application of technologies of shock-wave impact on productive formations (In Russ.), Tekhnologii nefti i gaza, 2019, no. 5, pp. 53–57.

8. Seysmicheskoe vibrovozdeystvie na neftyanuyu zalezh' (Seismic vibration impact on an oil reservoir): edited by Sadovskiy M.A., Nikolaev A.V., Moscow: Publ. of UIPE RAS, 1993, 240 p.

9. Simonov B.F., Cherednikov E.N., Serdyukov S.V. et al., The technology of volumetric wave action on oil and gas deposits to enhance hydrocarbon recovery (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1998, no. 4, pp. 42–44.

10. Kostrov S.A., Wooden W.O., Roberts P.M., In situ seismic shockwaves stimulate oil production, Oil and Gas Journal, 2001, V. 99(36), pp. 47–52.

11. Iktisanov V.A., Shkrudnev F.D., Oil recovery factor taking into account natural reserves replacement (In Russ.), Energeticheskaya politika, 2020, no. 9 (151), pp. 34–43. 

12. Iktisanov V.A., Sakhabutdinov R.Z., Evaluation of effectiveness of EOR and bottomhole treatment technologies using rate transient analysis (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 5, pp. 72–76.

13. Allain O. et al., Dynamic flow analysis, KAPPA, 2007.

Wave stimulation techniques to enhance oil recovery and/or remove formation damage in the near wellbore zone have been attracting interest in oil industry practice in recent years. It is known from literature that the technique has been successful in some cases, however, to-date, there are several controversial and inconclusive issues about the technology. The main point at issue is the physical mechanism of the wave stimulation process and its effect on different reservoir rocks. To gain greater insight into the process and to evaluate the efficiency of the wave stimulation technique in carbonate and sandstone reservoirs, Tatneft PJSC has carried out a wide-scale field experiment in the own producing assets. The experiment was carried out over a period of two years involving 23 wells on three pilot blocks. The wells adjacent to those with the waves’ generators were equipped with downhole gauges to measure pressure, production rate (or injectivity), and water cut of the wellstream. The field experiment comprised two stages: acquisition and analysis of production and injection wells’ data in absence of wave stimulation, and the same after starting and operation of generators. Reservoir flow capacity, viscosity and density of degassed oil at both stages were analyzed. To evaluate the effect of wave stimulation, the RTA (Rate Transient Analysis) provided by the Kappa Topaze software was applied instead of the commonly used DCA (Decline Curve Analysis) approach. Change in production rate after wave stimulation was used as the main criterion. Algorithm of determination of this parameter based on interpretation results was offered. The field experiment yielded the following results: in the Kynovskian-Pashiyan reservoirs with high water cut, oil production rates increased by some 6%; in addition, a significant increase in degassed oil viscosity was recorded suggesting that the by-passed oil was mobilized. In the Tournaisian reservoirs with low water cut developed at low borehole pressure, production rates did not change. Comparative analysis of pressure buildup curves did not show a somewhat pronounced change in the reservoir flow capacity.

References

1. Napol'skaya R.N., A promising technologies for stimulation of oil based on the wave phenomena (In Russ.), Neftegazovye tekhnologii i novye materialy. Problemy i resheniya, 2018, no. 7(12), pp. 168–174.

2. Dubinskiy G.S., Chibisov A.V., Ganiev O.R. et al., Planning of technologies for stimulation wells and enhance in oil recovery with use of wave processes and the resonance in productive layers (In Russ.), Neftegazovye tekhnologii i novye materialy. Problemy i resheniya, 2016, no. 5 (10), pp. 186–196.

3. Ganiev O.R., Ganiev R.F., Ukrainskiy L.E., Rezonansnaya makro- i mikromekhanika neftyanogo plasta. Intensifikatsiya dobychi nefti i povysheniya nefteotdachi. Nauka i praktika (Resonant macro- and micromechanics of an oil reservoir. Enhanced oil production and enhanced oil recovery. Science and practice), Moscow – Izhevsk: Institute of the computer science, 2014, 256 p.

4. Kuznetsov O.L., Dyblenko V.P., Sharifullin R.Ya., Tufanov I.A., Innovatsionnye volnovye tekhnologii i ikh ispol'zovanie dlya povysheniya effektivnosti razrabotki neftegazovykh mestorozhdeniy (Innovative wave technologies and their use to improve the efficiency of oil and gas field development), Collected papers “Elastic wave effect on fluid in porous media, Proceedings of III International conference, Moscow, 2012, pp. 4–7.

5. Barabanov V.L., Nikolaev A.V., Problema spektra dominantnykh chastot pri seysmicheskom vozdeystvii na neftyanye zalezhi (The problem of the spectrum of dominant frequencies during seismic impact on oil deposits), Collected papers “Elastic wave effect on fluid in porous media, Proceedings of III International conference, Moscow, 2012, pp. 30–33.

6. Barskaya E., Tukhvatullina A., Ganeeva Y., Yudupova T., Influence of ultrasonication on the dispersed structure of the crude oils, Collected papers “Elastic wave effect on fluid in porous media, Proceedings of III International conference, Moscow, 2012, pp.39–42.

7. Svalov A.M., Conditions of effective application of technologies of shock-wave impact on productive formations (In Russ.), Tekhnologii nefti i gaza, 2019, no. 5, pp. 53–57.

8. Seysmicheskoe vibrovozdeystvie na neftyanuyu zalezh' (Seismic vibration impact on an oil reservoir): edited by Sadovskiy M.A., Nikolaev A.V., Moscow: Publ. of UIPE RAS, 1993, 240 p.

9. Simonov B.F., Cherednikov E.N., Serdyukov S.V. et al., The technology of volumetric wave action on oil and gas deposits to enhance hydrocarbon recovery (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1998, no. 4, pp. 42–44.

10. Kostrov S.A., Wooden W.O., Roberts P.M., In situ seismic shockwaves stimulate oil production, Oil and Gas Journal, 2001, V. 99(36), pp. 47–52.

11. Iktisanov V.A., Shkrudnev F.D., Oil recovery factor taking into account natural reserves replacement (In Russ.), Energeticheskaya politika, 2020, no. 9 (151), pp. 34–43. 

12. Iktisanov V.A., Sakhabutdinov R.Z., Evaluation of effectiveness of EOR and bottomhole treatment technologies using rate transient analysis (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 5, pp. 72–76.

13. Allain O. et al., Dynamic flow analysis, KAPPA, 2007.


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