Логин:
Пароль:
Регистрация
Забыли свой пароль?

Analysis of laboratory studies and field test results for thermal and gas EOR method

UDK: 622.276.6
DOI: 10.24887/0028-2448-2018-9-62-67
Key words: kerogen, low-temperature oxidation, pyrolysis, Bazhenov formation, thermochemical reactor, combustion tube
Authors: E.A. Nikitina (VNIIneft JSC, RF, Moscow), S.I. Tolokonsky (VNIIneft JSC, RF, Moscow), K.A. Shchekoldin (RITEK JSC, RF, Moscow)

While continuously reducing of conventional oil resource base in Russia, the interest of large oil companies has been changed to development of hard-to-recover hydrocarbon reserves, in particular, to the Bazhenov formation with significant potential of organic matter. The bedrock is mainly represented by practically impermeable clay-carbonate-silicon rocks, with a significant content of organic matter being separated by low-thickness permeable carbonate-siliceous rocks. An oil being able to recover from carbonate rocks by traditional methods, the primary purpose of the impact on the Bazhenov reservoirs is to involve into development the undrained or low-drained areas of the deposit, and subsequent conversion of solid organic matter (kerogen) into mobile hydrocarbons, which has been confirmed by numerous laboratory and field tests. Researches carried out have shown thermal and gas impact`s most promising EOR technique for application on Bazhenov reservoirs, which consists in pumping air (enriched air, the air / water mixture) in the reservoir and in occurring of high temperature oxidation processes in it with the aim of involving solid organic substances in the development. In addition, the formation rock heated results in improved filtration and capacitive properties as well as formed network of cracks (channels) being for further recovery of mobile hydrocarbons.

Laboratory studies have been carried out in VNIIneft JSC for determination of two essential parameters, which are the amount of mobile hydrocarbons formed from solid organic matter and parameters of chemical reactions under thermal effects on oil and kerogen - containing rock for subsequent thermohydrodynamic modeling. Based on the results of studies for high-temperature oxidation in the "combustion tube", the main technological parameters of the thermal gas treatment are determined with the assessment of data obtained from the field tests for the Bazhenov formation stratum.

References

1. Lazeev A.N., Kashik A.S., Bilibin S.I. et al., Main problems of studying of the Bazhen formation deposits (In Russ.), Geofizika = Russian Geophysics, 2015, no. 3, pp. 2–4.

2.В  Nemova V.D., Conditions of reservoir formation in deposits of bazhenov strata whithin the junction of Krasnolenin arch and Frolov megadepression (In Russ), Neftegazovaya geologiya. Teoriya i praktika, 2012, V. 7, no. 2, URL: http://www.ngtp.ru/rub/4/23_2012.pdf

3. Nemova V.D., Litologiya i kollektorskie svoystva otlozheniy bazhenovskogo gorizonta na zapade Shirotnogo Priob'ya (Lithology and reservoir properties of BazhenovВ  horizon sediments in the west of Ob River Region): thesis of candidate of geological and mineralogical sciences, Moscow, 2012.

4. Kokorev V.I., Sudobin N.G., Polishchuk A.M. et al., Termodestruktsiya kerogena bituminoznykh porod Galyanovskogo mestorozhdeniya bazhenovskoy svity (Thermal degradation of kerogen of bituminous rocks of the Galyanovsky deposit of the Bazhenov suite), Proceedings of conference “Nanoyavleniya pri razrabotke mestorozhdeniy uglevodorodnogo syr'ya: ot nanomineralogii i nanokhimii k nanotekhnologiyam” (Nano-phenomena in the development of hydrocarbon deposits: from nanomineralogy and nanochemistry to nanotechnology), Moscow, 18–19 November, pp. 261–266.

5. Kokorev V.I., Sudobin N.G., Polishchuk A.M., Termodestruktsiya kerogena bituminoznykh porod tutleymskoy (bazhenovskoy) svity mestorozhdeniy Krasnoleninskogo rayona (Thermal degradation of kerogen of bituminous rocks of the Tutleymskaya (Bazhen) formation of the deposits of the Krasnoleninsky District), Proceedings of II international scientific symposium “Teoriya i praktika primeneniya metodov uvelicheniya nefteotdachi plastov” (Theory and practice of applying enhanced oil recovery methods), Moscow: Publ. of VNIIneft', 2009, Part 1.

6. Kokorev V.I., Vlasov S.A., Sudobin N.G., Polishchuk A.M., Studies of thermal impact on samples of Bazhenovsky series rocks (In Russ.), Neftepromyslovoe delo, 2010, no. 3, pp. 12–18.

7. Vasil'evskiy A.V., Nikitina E.A., Tolokonskiy S.I., Charuev S.A., An integrated approach to the study of the processes of air-injection for enhanced oil recovery (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 102–104.

8. Khimiya uglevodorodov nefti (Chemistry of petroleum hydrocarbons), edited by Bruks B.T., Burd S.E., Kurtts S.S., Shmerling L., Part 2, Leningrad: Gostoptekhizdat Publ., 1958, 391 p.

9. Chernozhukov N.I., Kreyn S.E., Okislyaemost' mineral'nykh masel (Oxidation of mineral oils), Moscow: Gostoptekhizdat Publ., 1955, 372 p.

10. Nikitina E.A., Tolokonskiy S.I., Darishchev V.I. et al., Usloviya obrazovaniya topliva pri primenenii termicheskogo vozdeystviya na plastakh bazhenovskoy svity (Conditions of fuel formation applying the thermal recovery method in Bazhenov formation horizons), Collected papers “Tekhnologii razrabotki trudnoizvlekaemykh zapasov uglevodorodov” (Technologies for the development of hard-to-recover hydrocarbon reserves): edited by Fomkin A.V., Zhdanov S.A., Proceedings of VNIIneft', 2016, V. 155.

11. Sheynman A.B., Malofeev G.E., Sergeev A.I., Vozdeystvie na plast teplom pri dobyche nefti (Effects on the formation of heat during oil production), Moscow: Nedra Publ., 1969, 256 p.

12. RITEK: The thermogas treatment of the Bazhen's series depositsВ  (In Russ.), ROGTEC, 2013, V. 35, pp. 28–32.

13. Tekhnika i tekhnologiya termogazovogo vozdeystviya na zalezhi bazhenovskoy svity (Technique and technology of thermogas effect on deposits of the Bazhenov suite): edited by Grayfer V.I., Moscow: Publ. of RITEK, 2017, Part 2,В  200 p.

While continuously reducing of conventional oil resource base in Russia, the interest of large oil companies has been changed to development of hard-to-recover hydrocarbon reserves, in particular, to the Bazhenov formation with significant potential of organic matter. The bedrock is mainly represented by practically impermeable clay-carbonate-silicon rocks, with a significant content of organic matter being separated by low-thickness permeable carbonate-siliceous rocks. An oil being able to recover from carbonate rocks by traditional methods, the primary purpose of the impact on the Bazhenov reservoirs is to involve into development the undrained or low-drained areas of the deposit, and subsequent conversion of solid organic matter (kerogen) into mobile hydrocarbons, which has been confirmed by numerous laboratory and field tests. Researches carried out have shown thermal and gas impact`s most promising EOR technique for application on Bazhenov reservoirs, which consists in pumping air (enriched air, the air / water mixture) in the reservoir and in occurring of high temperature oxidation processes in it with the aim of involving solid organic substances in the development. In addition, the formation rock heated results in improved filtration and capacitive properties as well as formed network of cracks (channels) being for further recovery of mobile hydrocarbons.

Laboratory studies have been carried out in VNIIneft JSC for determination of two essential parameters, which are the amount of mobile hydrocarbons formed from solid organic matter and parameters of chemical reactions under thermal effects on oil and kerogen - containing rock for subsequent thermohydrodynamic modeling. Based on the results of studies for high-temperature oxidation in the "combustion tube", the main technological parameters of the thermal gas treatment are determined with the assessment of data obtained from the field tests for the Bazhenov formation stratum.

References

1. Lazeev A.N., Kashik A.S., Bilibin S.I. et al., Main problems of studying of the Bazhen formation deposits (In Russ.), Geofizika = Russian Geophysics, 2015, no. 3, pp. 2–4.

2.В  Nemova V.D., Conditions of reservoir formation in deposits of bazhenov strata whithin the junction of Krasnolenin arch and Frolov megadepression (In Russ), Neftegazovaya geologiya. Teoriya i praktika, 2012, V. 7, no. 2, URL: http://www.ngtp.ru/rub/4/23_2012.pdf

3. Nemova V.D., Litologiya i kollektorskie svoystva otlozheniy bazhenovskogo gorizonta na zapade Shirotnogo Priob'ya (Lithology and reservoir properties of BazhenovВ  horizon sediments in the west of Ob River Region): thesis of candidate of geological and mineralogical sciences, Moscow, 2012.

4. Kokorev V.I., Sudobin N.G., Polishchuk A.M. et al., Termodestruktsiya kerogena bituminoznykh porod Galyanovskogo mestorozhdeniya bazhenovskoy svity (Thermal degradation of kerogen of bituminous rocks of the Galyanovsky deposit of the Bazhenov suite), Proceedings of conference “Nanoyavleniya pri razrabotke mestorozhdeniy uglevodorodnogo syr'ya: ot nanomineralogii i nanokhimii k nanotekhnologiyam” (Nano-phenomena in the development of hydrocarbon deposits: from nanomineralogy and nanochemistry to nanotechnology), Moscow, 18–19 November, pp. 261–266.

5. Kokorev V.I., Sudobin N.G., Polishchuk A.M., Termodestruktsiya kerogena bituminoznykh porod tutleymskoy (bazhenovskoy) svity mestorozhdeniy Krasnoleninskogo rayona (Thermal degradation of kerogen of bituminous rocks of the Tutleymskaya (Bazhen) formation of the deposits of the Krasnoleninsky District), Proceedings of II international scientific symposium “Teoriya i praktika primeneniya metodov uvelicheniya nefteotdachi plastov” (Theory and practice of applying enhanced oil recovery methods), Moscow: Publ. of VNIIneft', 2009, Part 1.

6. Kokorev V.I., Vlasov S.A., Sudobin N.G., Polishchuk A.M., Studies of thermal impact on samples of Bazhenovsky series rocks (In Russ.), Neftepromyslovoe delo, 2010, no. 3, pp. 12–18.

7. Vasil'evskiy A.V., Nikitina E.A., Tolokonskiy S.I., Charuev S.A., An integrated approach to the study of the processes of air-injection for enhanced oil recovery (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 102–104.

8. Khimiya uglevodorodov nefti (Chemistry of petroleum hydrocarbons), edited by Bruks B.T., Burd S.E., Kurtts S.S., Shmerling L., Part 2, Leningrad: Gostoptekhizdat Publ., 1958, 391 p.

9. Chernozhukov N.I., Kreyn S.E., Okislyaemost' mineral'nykh masel (Oxidation of mineral oils), Moscow: Gostoptekhizdat Publ., 1955, 372 p.

10. Nikitina E.A., Tolokonskiy S.I., Darishchev V.I. et al., Usloviya obrazovaniya topliva pri primenenii termicheskogo vozdeystviya na plastakh bazhenovskoy svity (Conditions of fuel formation applying the thermal recovery method in Bazhenov formation horizons), Collected papers “Tekhnologii razrabotki trudnoizvlekaemykh zapasov uglevodorodov” (Technologies for the development of hard-to-recover hydrocarbon reserves): edited by Fomkin A.V., Zhdanov S.A., Proceedings of VNIIneft', 2016, V. 155.

11. Sheynman A.B., Malofeev G.E., Sergeev A.I., Vozdeystvie na plast teplom pri dobyche nefti (Effects on the formation of heat during oil production), Moscow: Nedra Publ., 1969, 256 p.

12. RITEK: The thermogas treatment of the Bazhen's series depositsВ  (In Russ.), ROGTEC, 2013, V. 35, pp. 28–32.

13. Tekhnika i tekhnologiya termogazovogo vozdeystviya na zalezhi bazhenovskoy svity (Technique and technology of thermogas effect on deposits of the Bazhenov suite): edited by Grayfer V.I., Moscow: Publ. of RITEK, 2017, Part 2,В  200 p.



Attention!
To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases

13.11.2019
08.11.2019
30.10.2019