On the classification of the process of field based oil treatment taking into account the properties of separated products and other factors

UDK: 622.276.8
DOI: 10.24887/0028-2448-2021-12-140-143
Key words: grouping oil by density and viscosity, the difference in density of water and oil, hydrocarbon composition of oil, resins, asphaltenes, paraffin, highly mineralized formation waters, oil treatment, quality of waste water treatment
Authors: V.N. Kozhin (SamaraNIPIneft LLC, RF, Samara), A.V. Grishagin (SamaraNIPIneft LLC, RF, Samara)

When classifying the process of oil dehydration for preliminary assessments of the technological parameters of its treatment at various stages of the design and development of oil fields, it is necessary to take into account regional differences, starting with the geographical and geological location of oil deposits and the conditions of their occurrence, ending with the features of the physicochemical properties of reservoir fluids extracted to the surface. On the example of a number of fields in the Samara region, the dependence of the change in viscosity when changing from reservoir conditions to surface conditions is built, a comparative grouping of oil by viscosity in reservoir and surface conditions is considered, consistent with the classification of oil to assess the parameters of its preparation simultaneously in terms of density and viscosity in surface conditions. A conditional comparison of the classification parameters and the required temperature of the emulsion during oil dehydration to a residual water content of 10 wt% (preliminary dehydration) and 0.5-1 wt% (deep dehydration) was carried out according to various literature sources. It is proposed for the range of Paleozoic production of oil wells in the Volga-Ural oil and gas province, in addition to assessing the generally accepted characteristics of oil density and the content of paraffin in it, to select technological parameters for oil treatment, additionally use the relative indicators, taking into account the unique properties of highly mineralized reservoir waters and the heterogeneous hydrocarbon composition of the oil itself. On the basis of the introduced characteristics, the classification of oil dehydration of a number of fields in the Orenburg, Samara regions and Siberia is considered. A comparative assessment of the quality of wastewater treatment was carried out taking into account two calculation methods based on the properties of the separated phases, taking into account the mentioned characteristics, as well as the oil density and the specific load on the interface of the apparatuses for the combined preparation of oil and water.

References

1. Belokon' T.V., Gorbachev V.I., Balashova M.M., Stroenie i neftegazonosnost' rifeysko-vendskikh otlozheniy vostoka Russkoy platformy (Structure and oil and gas potential of the Riphean-Vendian deposits of the eastern Russian platform), Perm': Zvezda Publ., 2001, 108 p.

2. Grishagin A.V., Gladunov O.V., Manasyan A.E. et al., On the need for promotion of research and high-quality data support in fi d development projects and design of surface facilities (In Russ.), Ekspozitsiya Neft' Gaz, 2018, no. 4, pp. 45-50.

3. Grishagin A.V., Andreev V.I., Manasyan  A.E. et al., Formation waters or their mixtures with surface water applicability as possible agent for reservoir water-flooding purposes (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2013, no. 11, pp. 44–49.

4. Smirnov Yu.S., Meloshenko N.T., Chemical demulsification of oil as the basis for its field treatment (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1989, no. 8, pp. 46-50.

5. Persiyantsev M.N., Grishagin A.V., Andreev V.V., Ryabin N.A., On the influence of oil properties on the quality of discharged water during preliminary dehydration of well products (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1999, no. 3, pp. 47-49.

6. Nikitin Yu.M., Grishagin A.V., Separation of the emulsion in the equipment for the combined preparation of oil and water (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1989, no. 5, pp. 54-56.

7. Tarasov M.Yu., Zyryanov A.B., Preliminary estimation of technological parameters of oil treatment on the basis of oils emulsibility classification (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2008, no. 9, pp. 105-107.

8. Order of the Ministry of Natural Resources of Russia dated 01.02.2016 N 3-r (as amended on 19.04.2018) “Ob utverzhdenii metodicheskikh rekomendatsiy po primeneniyu Klassifikatsii zapasov i resursov nefti i goryuchikh gazov, utverzhdennoy prikazom Ministerstva prirodnykh resursov i ekologii RF ot 01.11.2013 N 477” (On the approval of methodological recommendations for the application of the Classification of reserves and resources of oil and combustible gases, approved by order of the Ministry of Natural Resources and Environment of the Russian Federation dated 01.11.2013 N 477).

9. RD 39-30-898-83, Instruktsiya po issledovaniyu neftey i neftyanykh emul'siy s tsel'yu vydachi iskhodnykh dannykh dlya proektirovaniya ustanovok podgotovki nefti (Instructions for the study of oils and oil emulsions in order to provide initial data for the design of oil treatment units), Kuybyshev: Giprovostokneft', 1984, 202 p.

When classifying the process of oil dehydration for preliminary assessments of the technological parameters of its treatment at various stages of the design and development of oil fields, it is necessary to take into account regional differences, starting with the geographical and geological location of oil deposits and the conditions of their occurrence, ending with the features of the physicochemical properties of reservoir fluids extracted to the surface. On the example of a number of fields in the Samara region, the dependence of the change in viscosity when changing from reservoir conditions to surface conditions is built, a comparative grouping of oil by viscosity in reservoir and surface conditions is considered, consistent with the classification of oil to assess the parameters of its preparation simultaneously in terms of density and viscosity in surface conditions. A conditional comparison of the classification parameters and the required temperature of the emulsion during oil dehydration to a residual water content of 10 wt% (preliminary dehydration) and 0.5-1 wt% (deep dehydration) was carried out according to various literature sources. It is proposed for the range of Paleozoic production of oil wells in the Volga-Ural oil and gas province, in addition to assessing the generally accepted characteristics of oil density and the content of paraffin in it, to select technological parameters for oil treatment, additionally use the relative indicators, taking into account the unique properties of highly mineralized reservoir waters and the heterogeneous hydrocarbon composition of the oil itself. On the basis of the introduced characteristics, the classification of oil dehydration of a number of fields in the Orenburg, Samara regions and Siberia is considered. A comparative assessment of the quality of wastewater treatment was carried out taking into account two calculation methods based on the properties of the separated phases, taking into account the mentioned characteristics, as well as the oil density and the specific load on the interface of the apparatuses for the combined preparation of oil and water.

References

1. Belokon' T.V., Gorbachev V.I., Balashova M.M., Stroenie i neftegazonosnost' rifeysko-vendskikh otlozheniy vostoka Russkoy platformy (Structure and oil and gas potential of the Riphean-Vendian deposits of the eastern Russian platform), Perm': Zvezda Publ., 2001, 108 p.

2. Grishagin A.V., Gladunov O.V., Manasyan A.E. et al., On the need for promotion of research and high-quality data support in fi d development projects and design of surface facilities (In Russ.), Ekspozitsiya Neft' Gaz, 2018, no. 4, pp. 45-50.

3. Grishagin A.V., Andreev V.I., Manasyan  A.E. et al., Formation waters or their mixtures with surface water applicability as possible agent for reservoir water-flooding purposes (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2013, no. 11, pp. 44–49.

4. Smirnov Yu.S., Meloshenko N.T., Chemical demulsification of oil as the basis for its field treatment (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1989, no. 8, pp. 46-50.

5. Persiyantsev M.N., Grishagin A.V., Andreev V.V., Ryabin N.A., On the influence of oil properties on the quality of discharged water during preliminary dehydration of well products (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1999, no. 3, pp. 47-49.

6. Nikitin Yu.M., Grishagin A.V., Separation of the emulsion in the equipment for the combined preparation of oil and water (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1989, no. 5, pp. 54-56.

7. Tarasov M.Yu., Zyryanov A.B., Preliminary estimation of technological parameters of oil treatment on the basis of oils emulsibility classification (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2008, no. 9, pp. 105-107.

8. Order of the Ministry of Natural Resources of Russia dated 01.02.2016 N 3-r (as amended on 19.04.2018) “Ob utverzhdenii metodicheskikh rekomendatsiy po primeneniyu Klassifikatsii zapasov i resursov nefti i goryuchikh gazov, utverzhdennoy prikazom Ministerstva prirodnykh resursov i ekologii RF ot 01.11.2013 N 477” (On the approval of methodological recommendations for the application of the Classification of reserves and resources of oil and combustible gases, approved by order of the Ministry of Natural Resources and Environment of the Russian Federation dated 01.11.2013 N 477).

9. RD 39-30-898-83, Instruktsiya po issledovaniyu neftey i neftyanykh emul'siy s tsel'yu vydachi iskhodnykh dannykh dlya proektirovaniya ustanovok podgotovki nefti (Instructions for the study of oils and oil emulsions in order to provide initial data for the design of oil treatment units), Kuybyshev: Giprovostokneft', 1984, 202 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. .