Логин:
Пароль:
Регистрация
Забыли свой пароль?

On the interpretation of drilling fluids rotational viscometry data

UDK: 622.244.442
DOI: 10.24887/0028-2448-2018-10-50-53
Key words: biviscosity fluids, multi-criteria analysis, maximum principle of likely hood function, rheologically stationary model, rotational viscometry, Couette flow
Authors: М.А. Myslyuk (Ivano-Frankivsk National Technical University of Oil and Gas, Ukraine, Ivano-Frankivsk)

The data processing technique for rotational viscometry has been considered, which is based on the maximum likely hood function principle, takes into account the information content of the experiments and is built on the strict solution of the Couette flow equation in the viscosimeter gap. The class of models is formed fr om rheologically stationary (including biviscosity) models that admit an explicit analytical representation of the form .і = .і (Д) wh ere .і – velocity gradient, Д – shear stress. It is noted that for a fairly complete class of rheological models, there are several models with similar values for the criteria of their choice.

To increase the efficiency of making technological decisions with certain requirements for information support, it has been proposed to evaluate the rheological model and properties on the basis of multi criteria analysis. The stages of processing rotational viscometryВ  data has been described, including the formation of a class of rheological models, evaluation of rheological properties using the criteria of the likelihood function, selection of a subset of equivalent rheological models, construction of covariance matrices and the accuracy criteria for evaluating rheological properties and selection of a rheological model by the accuracy criteria.

Illustrative examples of the interpretation of the results of processing the rheological properties for the biopolymer Biokar system and the re-suspension slurry RTM-75 PV have been given.

References

1. Golubev D.A., The true rheological curves plotting using the data of rotational viscosimetry (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1979, no. 8, pp. 18–21.

2. Myslyuk M.A., On the procedure for determining the rheological properties of disperse media from the data of rotational viscosimetry (In Russ.), Inzhenerno-fizicheskiy zhurnal, 1988, V. 54, no. 6, pp. 975–979.

3. Kelessidis V.C., Maglione R., Shear rate corrections for Herschel – Bulkley fluids in Coutte geometry, Applied Rheology, 2008, V.183, 34482 p.

4. Bui B.T., Tutuncu A.N., A generalized rheological model for drilling fluids with cubic splines, SPE 169527-PA, 2015.

5. Myslyuk M.A., Salyzhin Yu.M., The evaluation of biviscosity fluids rheological properties on the basis of rotational viscometry data (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2008, no. 12, pp. 40–42.

6. Myslyuk M.A., Salyzhin Yu.M., Evaluation of the influence of barothermic conditions on the rheological properties of drilling fluids (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2007, no. 4, pp. 44–47.

7. Myslyuk M., Salyzhyn I., The evaluation rheological parameters of non-Newtonian fluids by rotational viscosimetry, Applied Rheology, 2012, V. 223, 32381 p.

8. Myslyuk M.A., Rheotechnologies in well drilling, Journal of Hydrocarbon Power Engineering, 2016, V. 3, no. 2, pp. 39–45.

9. Myslyuk M.A., Bogoslavets V.V., Luban Yu.V. et al., Research of rheological properties of "Biokar" biopolymer system (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2015, no. 8, pp. 31–36.

The data processing technique for rotational viscometry has been considered, which is based on the maximum likely hood function principle, takes into account the information content of the experiments and is built on the strict solution of the Couette flow equation in the viscosimeter gap. The class of models is formed fr om rheologically stationary (including biviscosity) models that admit an explicit analytical representation of the form .і = .і (Д) wh ere .і – velocity gradient, Д – shear stress. It is noted that for a fairly complete class of rheological models, there are several models with similar values for the criteria of their choice.

To increase the efficiency of making technological decisions with certain requirements for information support, it has been proposed to evaluate the rheological model and properties on the basis of multi criteria analysis. The stages of processing rotational viscometryВ  data has been described, including the formation of a class of rheological models, evaluation of rheological properties using the criteria of the likelihood function, selection of a subset of equivalent rheological models, construction of covariance matrices and the accuracy criteria for evaluating rheological properties and selection of a rheological model by the accuracy criteria.

Illustrative examples of the interpretation of the results of processing the rheological properties for the biopolymer Biokar system and the re-suspension slurry RTM-75 PV have been given.

References

1. Golubev D.A., The true rheological curves plotting using the data of rotational viscosimetry (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1979, no. 8, pp. 18–21.

2. Myslyuk M.A., On the procedure for determining the rheological properties of disperse media from the data of rotational viscosimetry (In Russ.), Inzhenerno-fizicheskiy zhurnal, 1988, V. 54, no. 6, pp. 975–979.

3. Kelessidis V.C., Maglione R., Shear rate corrections for Herschel – Bulkley fluids in Coutte geometry, Applied Rheology, 2008, V.183, 34482 p.

4. Bui B.T., Tutuncu A.N., A generalized rheological model for drilling fluids with cubic splines, SPE 169527-PA, 2015.

5. Myslyuk M.A., Salyzhin Yu.M., The evaluation of biviscosity fluids rheological properties on the basis of rotational viscometry data (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2008, no. 12, pp. 40–42.

6. Myslyuk M.A., Salyzhin Yu.M., Evaluation of the influence of barothermic conditions on the rheological properties of drilling fluids (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2007, no. 4, pp. 44–47.

7. Myslyuk M., Salyzhyn I., The evaluation rheological parameters of non-Newtonian fluids by rotational viscosimetry, Applied Rheology, 2012, V. 223, 32381 p.

8. Myslyuk M.A., Rheotechnologies in well drilling, Journal of Hydrocarbon Power Engineering, 2016, V. 3, no. 2, pp. 39–45.

9. Myslyuk M.A., Bogoslavets V.V., Luban Yu.V. et al., Research of rheological properties of "Biokar" biopolymer system (In Russ.), Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more, 2015, no. 8, pp. 31–36.


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

Press Releases

16.07.2019
08.07.2019
04.07.2019
SPE 2019
ТАТАРСТАНСКИЙ НЕФТЕГАЗОХИМИЧЕСКИЙ ФОРУМ