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Application of multidimensional models for the evaluation of oil displacement efficiency in the Visean productive sediments of the Solikamsk depression

UDK: 622.276.21
DOI: 10.24887/0028-2448-2018-04-58-61
Key words: oil displacement efficiency, porosity, permeability, residual-water saturation, rock density, regression and discriminant analysis, multidimensional equation
Authors: E.A. Gladkikh (Perm National Research Polytechnic University, RF, Perm)

The main reserves of large oil fields discovered in the last century have already been worked out. Much smaller deposits are involved in development to maintain oil production. The calculation of the recoverable reserves of such deposits and the compilation of development documents requires conducting, among other things, studies to determine the oil displacement efficiency that is normally performed in laboratory on the formation models. These works are labor-intensive and time-consuming, require the attraction of significant technical and material resources, and their results are relevant only for specific geological and physical conditions. Moreover, this method of determining the displacement efficiency is impossible, for example, in the absence of a sufficient core, which is relevant for new and relatively small deposits.

Estimation of the displacement efficiency by analogy with other deposits or with use analytical dependencies is alternative method. The author's work is devoted to obtaining these dependencies.

The article presents the main results of studies on the problem of estimating the oil displacement efficiency using the example of the Visean terrigenous deposits of the Solikamsk depression of the Perm Region. Correlation, regression and discriminant analyzes were used to process laboratory data on the oil displacement efficiency. Dependences are obtained that allow us to estimate the displacement efficiency, using, along with the viscosity of oil, the parameters of porosity, permeability, residual water saturation and bulk density of the rock, determined by standard core analysis.

Multidimensional equations are applicated to estimate the oil displacement efficiency in the Visean productive sediments of a number of Solikamsk depression deposits, for which the coefficient value is determined in laboratory conditions. The results showed a high convergence of the model values of the displacement efficiency with the results of special flow studies.

References

1. Mikhnevich V.G., Tul'bovich B.I., Metodicheskie rekomendatsii po opredeleniyu koeffitsienta vytesneniya nefti raschetnym sposobom(Methodical recommendations for determining the oil displacement coefficient by calculation method), Perm': Publ. of PermNIPIneft', 1980, 12 p.

2. Tul'bovich B.I., Mikhnevich V.G., Mitrofanov V.P. et al., Primenenie obobshchennykh petrofizicheskikh zavisimostey pri podschete balansovykh i izvlekaemykh zapasov (Application of generalized petrophysical dependencies in the calculation of balance and recoverable reserves), Collected papers Problemy geologii i razrabotki neftyanykh mestorozhdeniy v rayonakh s istoshchayushchimisya resursami (Problems of geology and development of oil fields in areas with depleting resources), Proceedings of BashNIPIneft', 1989, V. 79, pp. 117123.

3. Mikhnevich V.G., Tul'bovich B.I., Khizhnyak G.P., Metodicheskie rekomendatsii po opredeleniyu koeffitsienta vytesneniya nefti vodoy raschetnym sposobom(Methodical recommendations for determining the coefficient of displacement of oil by water using calculation), Perm': Publ. of PermNIPIneft', 1988, 12 p.

4. Repina V.A., How to consider rock density in fluid flow model of oil fields during permeability modelling (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2017, V. 16, no. 2, pp. 104112, DOI: 10.15593/2224-9923/2017.2.1

5. Galkin V.I., Ponomareva I.N., Repina V.A., Study of oil recovery from reservoirs of different void types with use of multidimensional statistical analysis (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2016, V. 15, no. 19, pp. 145154, DOI: 10.15593/2224-9923/2016.19.5.

6. Patent application no. 2017116297 RF, kl. MPK G01N 15/08, Sposob opredeleniya koeffitsienta vytesneniya nefti bashkirskikh karbonatnykh otlozheniy Bashkirskogo svoda (The method for determining the oil displacement coefficient of the Bashkir carbonate deposits of the Bashkir Arch), Inventors: Galkin V.I., Gladkikh E.A., Khizhnyak G.P. 

7. Patent application no. 2017116296 RF, kl. MPK G01N 15/08, Sposob opredeleniya koeffitsienta vytesneniya nefti bashkirskikh karbonatnykh otlozheniy Solikamskoy depressii (Method for determining the oil displacement coefficient of Bashkir carbonate deposits of the Solikamsk depression), Inventors: Galkin V.I., Gladkikh E.A., Khizhnyak G.P. 

8. Gladkikh E.A., Khizhnyak G.P., Galkin V.I., Popov N.A., Method for evaluation of oil displacement coefficient based on conventional core analysis (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2017, V. 16, no. 3, pp. 225237, DOI:10.15593/2224-9923/2017.3.3.

9. Gladkikh E.A., Khizhniak G.P., Galkin V.I., Estimation method of oil displacement efficiency based on standard core analysis, Advances in Engineering Research: Proceedings of the International Conference Actual Issues of Mechanical Engineering 2017 (AIME 2017), 27-29 July, 2017, Tomsk, Russia, 2017, V. 133, pp. 240247, DOI: 10.2991/aime-17.2017.40.

10. Gladkikh E.A., Khizhnyak G.P., Development of a model applied to estimate the oil displacement factor (on the example of Bashkir carbonate deposits) (In Russ.), Neftepromyslovoe delo, 2017, no. 5, pp. 914. 

11. Gladkikh E.A., Khizhnyak G.P., Galkin V.I., The method for estimating the oil displacement coefficient based on standard core analysis (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 8, pp. 9093, DOI: 10.24887/0028-2448-2017-8-90-93.

12. Kolychev I.Yu., Study of zones of wettability distribution based on lateral logging for oil-bearing Visean reservoirs of the Solikamsk depression (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2017, V. 16, no. 4, pp. 331341, DOI:10.15593/2224-9923/2017.4.4

13. Galkin S.V., Accounting methods of geological risks on the stage of oil fields exploration (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2012, V. 11, no. 4, pp. 2332.

14. Lyadova N.A., Yakovlev Yu.A., Raspopov A.V., Geologiya i razrabotka neftyanykh mestorozhdeniy Permskogo kraya (Geology and development of oil deposits of the Perm region), Moscow: Publ. of VNIIOENG, 2010, 335 p.

The main reserves of large oil fields discovered in the last century have already been worked out. Much smaller deposits are involved in development to maintain oil production. The calculation of the recoverable reserves of such deposits and the compilation of development documents requires conducting, among other things, studies to determine the oil displacement efficiency that is normally performed in laboratory on the formation models. These works are labor-intensive and time-consuming, require the attraction of significant technical and material resources, and their results are relevant only for specific geological and physical conditions. Moreover, this method of determining the displacement efficiency is impossible, for example, in the absence of a sufficient core, which is relevant for new and relatively small deposits.

Estimation of the displacement efficiency by analogy with other deposits or with use analytical dependencies is alternative method. The author's work is devoted to obtaining these dependencies.

The article presents the main results of studies on the problem of estimating the oil displacement efficiency using the example of the Visean terrigenous deposits of the Solikamsk depression of the Perm Region. Correlation, regression and discriminant analyzes were used to process laboratory data on the oil displacement efficiency. Dependences are obtained that allow us to estimate the displacement efficiency, using, along with the viscosity of oil, the parameters of porosity, permeability, residual water saturation and bulk density of the rock, determined by standard core analysis.

Multidimensional equations are applicated to estimate the oil displacement efficiency in the Visean productive sediments of a number of Solikamsk depression deposits, for which the coefficient value is determined in laboratory conditions. The results showed a high convergence of the model values of the displacement efficiency with the results of special flow studies.

References

1. Mikhnevich V.G., Tul'bovich B.I., Metodicheskie rekomendatsii po opredeleniyu koeffitsienta vytesneniya nefti raschetnym sposobom(Methodical recommendations for determining the oil displacement coefficient by calculation method), Perm': Publ. of PermNIPIneft', 1980, 12 p.

2. Tul'bovich B.I., Mikhnevich V.G., Mitrofanov V.P. et al., Primenenie obobshchennykh petrofizicheskikh zavisimostey pri podschete balansovykh i izvlekaemykh zapasov (Application of generalized petrophysical dependencies in the calculation of balance and recoverable reserves), Collected papers Problemy geologii i razrabotki neftyanykh mestorozhdeniy v rayonakh s istoshchayushchimisya resursami (Problems of geology and development of oil fields in areas with depleting resources), Proceedings of BashNIPIneft', 1989, V. 79, pp. 117123.

3. Mikhnevich V.G., Tul'bovich B.I., Khizhnyak G.P., Metodicheskie rekomendatsii po opredeleniyu koeffitsienta vytesneniya nefti vodoy raschetnym sposobom(Methodical recommendations for determining the coefficient of displacement of oil by water using calculation), Perm': Publ. of PermNIPIneft', 1988, 12 p.

4. Repina V.A., How to consider rock density in fluid flow model of oil fields during permeability modelling (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2017, V. 16, no. 2, pp. 104112, DOI: 10.15593/2224-9923/2017.2.1

5. Galkin V.I., Ponomareva I.N., Repina V.A., Study of oil recovery from reservoirs of different void types with use of multidimensional statistical analysis (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2016, V. 15, no. 19, pp. 145154, DOI: 10.15593/2224-9923/2016.19.5.

6. Patent application no. 2017116297 RF, kl. MPK G01N 15/08, Sposob opredeleniya koeffitsienta vytesneniya nefti bashkirskikh karbonatnykh otlozheniy Bashkirskogo svoda (The method for determining the oil displacement coefficient of the Bashkir carbonate deposits of the Bashkir Arch), Inventors: Galkin V.I., Gladkikh E.A., Khizhnyak G.P. 

7. Patent application no. 2017116296 RF, kl. MPK G01N 15/08, Sposob opredeleniya koeffitsienta vytesneniya nefti bashkirskikh karbonatnykh otlozheniy Solikamskoy depressii (Method for determining the oil displacement coefficient of Bashkir carbonate deposits of the Solikamsk depression), Inventors: Galkin V.I., Gladkikh E.A., Khizhnyak G.P. 

8. Gladkikh E.A., Khizhnyak G.P., Galkin V.I., Popov N.A., Method for evaluation of oil displacement coefficient based on conventional core analysis (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2017, V. 16, no. 3, pp. 225237, DOI:10.15593/2224-9923/2017.3.3.

9. Gladkikh E.A., Khizhniak G.P., Galkin V.I., Estimation method of oil displacement efficiency based on standard core analysis, Advances in Engineering Research: Proceedings of the International Conference Actual Issues of Mechanical Engineering 2017 (AIME 2017), 27-29 July, 2017, Tomsk, Russia, 2017, V. 133, pp. 240247, DOI: 10.2991/aime-17.2017.40.

10. Gladkikh E.A., Khizhnyak G.P., Development of a model applied to estimate the oil displacement factor (on the example of Bashkir carbonate deposits) (In Russ.), Neftepromyslovoe delo, 2017, no. 5, pp. 914. 

11. Gladkikh E.A., Khizhnyak G.P., Galkin V.I., The method for estimating the oil displacement coefficient based on standard core analysis (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 8, pp. 9093, DOI: 10.24887/0028-2448-2017-8-90-93.

12. Kolychev I.Yu., Study of zones of wettability distribution based on lateral logging for oil-bearing Visean reservoirs of the Solikamsk depression (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2017, V. 16, no. 4, pp. 331341, DOI:10.15593/2224-9923/2017.4.4

13. Galkin S.V., Accounting methods of geological risks on the stage of oil fields exploration (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2012, V. 11, no. 4, pp. 2332.

14. Lyadova N.A., Yakovlev Yu.A., Raspopov A.V., Geologiya i razrabotka neftyanykh mestorozhdeniy Permskogo kraya (Geology and development of oil deposits of the Perm region), Moscow: Publ. of VNIIOENG, 2010, 335 p.



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