New models to predict the viscosity of extra-heavy oil in Colombian fields.
Abstract
Viscosity is one of the fundamental properties of fluids in calculating the pressure drop of fluid flow through pipes or porous media. It is also highly relevant in interpreting production tests, hydrocarbon transport and the analysis of problems that may arise in the well. This paper introduces an adjustment to the De Ghetto viscosity model in order to accurately predict the viscosity of undersaturated extra-heavy oil.
The adjustment of the De Ghetto model for undersaturated extra-heavy oil has been developed using a database of PVT analysis of extra-heavy oil to assess the accuracy of the models published in literature. Subsequently, by using statistical analysis and regression techniques, the models with the best approximation to the values of the PVT reports were adjusted, thus resulting in two models with absolute average error rates of 4.69 and 2.42%. These rates are valid for oils with API gravities ranging from 6.5 to 9.5, in order to accurately predict the viscosity of undersaturated extra-heavy oils.
References
https://doi.org/10.1016/B978-1-933762-03-6.50010-1
Bergman, D. F. & Sutton, R. P. (2006). Undersaturated oil viscosity correlation for adverse conditions. SPE Annual Technical Conference and Exhibition, San Antonio. SPE 103144.
De Ghetto, G., Paone, F. & Villa, M. (1995). Pressure-Volume- Temperature correlations for heavy and extra heavy oils. International Heavy Oil Symposium, Calgary. SPE 30316.
https://doi.org/10.2118/30316-MS
Elsharkawy, A. M. & Alikhan, A. A. (1999). Models for predicting the viscosity of middle east crude oils. Fuel, 78(8), 891-903.
https://doi.org/10.1016/S0016-2361(99)00019-8
Hossain, M. S., Sarica, C., Zhang, H. Q., Rhyne, L. & Greenhill, K. (2005). Assessment wand development of heavy-oil viscosity correlations. SPE International Thermal Operations and Heavy Oil Symposium. Calgary. SPE 97907.
https://doi.org/10.2118/97907-MS
Kartoatmodjo, T. & Schmidt, Z. (1991). New correlations for crude oil physical properties. SPE 23556.
Labedi, R. (1992). Improved correlations for predicting the viscosity of light crudes. J. Petrol. Sci. Eng., 8(3), 221-234.
https://doi.org/10.1016/0920-4105(92)90035-Y
Petrosky, G. E. & Farshad, F. F. (1995). Viscosity correlations for Gulf of México crude oils. SPE Production Operation Symposium, Oklahoma. SPE 29468.
https://doi.org/10.2118/29468-MS
Standing, M. B. (1947). A Pressure Volume-Temperature correlation for mixtures of California oils and gases. Drilling and Production Practices, New York. API 47-275.
Treviño, M. (2006). Futuro pesado. Carta Petrolera. 114.
Vásquez, M. E. & Beggs, H. D. (1980). Correlation for fluid physical property prediction. J. Petrol. Technol., 32(6), 968-970.
https://doi.org/10.2118/6719-PA
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