Impacto de los estudios reológicos en el transporte por oleoducto de crudos parafínicos

  • L. RODRIGUEZ Ecopetrol S.A. – Instituto Colombiano del Petróleo, A.A. 4185 Bucaramanga, Santander, Colombia
  • H. VIDALES Ecopetrol S.A. – Instituto Colombiano del Petróleo, A.A. 4185 Bucaramanga, Santander, Colombia
  • M. CASTAÑEDA Ecopetrol S.A. – Instituto Colombiano del Petróleo, A.A. 4185 Bucaramanga, Santander, Colombia
  • G. LEAL Ecopetrol S.A. – Instituto Colombiano del Petróleo, A.A. 4185 Bucaramanga, Santander, Colombia
  • R. BARRERO Ecopetrol S.A. – Instituto Colombiano del Petróleo, A.A. 4185 Bucaramanga, Santander, Colombia
  • J. GARZÓN Ecopetrol S.A. – Instituto Colombiano del Petróleo, A.A. 4185 Bucaramanga, Santander, Colombia
Keywords: viscosity, creep stress, rheological behavior, restart pumping, crude paraffin, pour point depressants, cloud point, pour point

Abstract

The results of this applied research contribute fundamental elements for handling paraffinic crude oils (pipeline design and operation) and the optimization of the use of Pour Point Depressor additives. The rheological studies support the fluid-dynamic analyses that accurately predict the pipeline transport operation, unlike traditional parameters such as pour point and cloud point. The evaluation of rheological behavior was carried out at the laboratory level in concentric viscometers and were scaled at the pilot plant level in a fluid-dynamic test circuit in pipes with diameters from 1.27 to 15.24 cm (1/2 to 6 inches), where the laboratory scale was confirmed. The tests were performed under strain rate temperature and conditions similar to those of pipeline and flowline operation in production fields. Also, the viability to restart pumping after a prolonged shutdown with extreme temperatures was calculated, evaluating creep stress. The study has allowed us to transport Cupiagua crude oil without the PPD additive in a segregated manner, showing that despite its high pour point 300K (27 °C), in dynamic conditions similar to those in the pipeline, the crude oil flows at temperatures near 283K (10 °C) without putting the integrity of the pipe in danger and within operational and equipment restrictions for the company operating the pipeline. This has generated significant savings, due to the additive as well as the possibility to segregate the crude oils, which facilitates the operation of the paraffin plant at the Barrancabermeja Industrial Complex.

References

Agrawal, K. M. et al., 1990. "Wax deposition of Bombay high crude oil under flowing conditions". Fuel, vol 69, June. https://doi.org/10.1016/0016-2361(90)90051-Q

Agrawal, K. M., 1989. "Influence of waxes on the flow properties of Bombay high crude" Fuel, vol 68, July. https://doi.org/10.1016/0016-2361(89)90134-8

Ajienka, J.A., 1994. "Criteria for the design of waxy crude oil pipelines: maximum pump (horsepower) pressure requirement". PS& E. Nov. https://doi.org/10.1016/0920-4105(94)00064-B

ASTM Designation: D 5853 - 95, Standard Test Method for Pour Point of Crude Oils.

ASTM Designation 287 Standard Method For API Gravitiy of Crude Petroleum and Petroleum Products (Hidrometer Method).

Denis, J., Durand, J. P., 1991. "Modifiation of Wax Crystallyzation in Petroleum Products". Instituto Francés del Petróleo. https://doi.org/10.2516/ogst:1991031

Grosso, J.L., Castro, A. y Escalante, D. et al., 1987. "Estudio para la Vicepresidencia de Transporte: Efecto de la dilución de crudos parafínicos y no parafínicos a transportar por el Oleoducto Central de los Llanos". Influencia en el comportamiento reológico y punto de fluidez. Informe técnico Ecopetrol-ICP.

Grosso J.L., Rosero, G. y Rodríguez, L. et al., 1989. "Influencia del Sistema de Mezclado en los Consumos de Aditivo Depresor de Punto de Fluidez para Transporte de Crudos Parafínicos por el Oleoducto Central de los Llanos". Efecto del Escalado. Informe técnico Ecopetrol-ICP.

Grosso J.L., Rosero, G., Barrero, R. y Rodríguez, L., 1989. "Optimización del uso de aditivos Modificadores de Punto de Fluidez y Viscosidad en los crudos parafínicos". Informe técnico Ecopetrol-ICP.

Grosso J.L., Barrero, R. y Rodríguez, L. et al., 1990. "Estudio comparativo de la efectividad de Aditivos Modificadores de Punto de Fluidez para los crudos parafínicos". Informe técnico Ecopetrol-ICP.

Kumar, S.R.K., Gandhi, V., Agrawal, N.K. and Patel, S.M., 1995. "Rheological Behaviour of Waxy Crude Oils for Transportation trough Pipeline". Petrotech.

Majeed, A. et al., 1990. "Model calcules wax deposition for N. sea Oils". Oil & Gas Journal, June 18.

Brown., 1995. Brief: "Measurement and Prediction of the Kinetics of Parafin Deposition". SPE 30331, JPT April.

Rodríguez, L., Castañeda, M. y Garzón, J., 1999. "Fenómenos de Cristalización de parafinas y sus Efectos en las Propiedades de Flujo de Crudos Parafínicos". Informe Proyecto Investigación Ecopetrol-Instituto Colombiano del Petróleo.

Sanjay, M. et al., 1995. "Parafin problems in crude oil production and transportation: a review". SPE Production & Facilities, February. https://doi.org/10.2118/28181-PA

Srivastava, S. P. et al. 1992. "Crystallization Behaviour of n-Paraffins in Bombay High Middle - Distillate wax/gel". Fuel, vol 71, May. https://doi.org/10.1016/0016-2361(92)90150-M

Svendsen, J.A., 1993. "Mathematical Modeling of Wax Deposition in Oil Pipeline Systems". AIC the Journal, Vol 39, No. 8. Aug. https://doi.org/10.1002/aic.690390815

Vidales, H., Leal, G., Barrero, R. y Rodríguez, L., 1998. "Caracterización Fluidodinámica para el transporte de crudos y mezclas Cupiagua y Cusiana-Pruebas Laboratorio y Planta Piloto". Informe Técnico Ecopetrol-ICP.

Vidales, H., Ruiz, M., Leal, G., Barrero, R. y Rodríguez, L., et al., 1999. "Estudio de Rearranque de Oleoducto simulando parada prolongada en el transporte de crudo parafínico Cupiagua y Cusiana". Informe técnico Ecopetrol-ICP.

How to Cite
RODRIGUEZ, L. ., VIDALES, H. ., CASTAÑEDA, M., LEAL, G. ., BARRERO, R., & GARZÓN, J. . (2000). Impacto de los estudios reológicos en el transporte por oleoducto de crudos parafínicos. CT&F - Ciencia, Tecnología Y Futuro, 2(1), 19–29. https://doi.org/10.29047/01225383.557

Downloads

Download data is not yet available.
Published
2000-12-31
Section
Scientific and Technological Research Articles

Altmetric

Crossref Cited-by logo
QR Code

Some similar items: