Numerical and Experimental Investigation of CO2 Corrosion

Author

By MYSARA EISSA MOHYALDIN, NOAMAN ELKHATIB, MOKHTAR CHE ISMAIL.

Abstracts

Internal corrosion is a common problem in pipelines transporting oil and gas containing corrosive components such as CO2 and H2S. In many mature oil wells, the water cut and CO2 content may reach high level which forms a suitable environment for initiation and growth of corrosion. To avoid the consequences of corrosion, process parameters should always be controlled within safe operating limits. To do so, corrosion rates at various values of the parameters are to be predicted to set the critical values of every parameter; and then the process should be operated below these critical values. Efforts have been made to predict and control corrosion in many oil fields worldwide. As a result, many models and measurement techniques have been proposed. One of these models is NORSOK Norwegian standard CO2 prediction model (NORSOK 2005), which predict the corrosion rate due to presence of CO2 in straight pipes that transport single phase or two-phase (oil-water) fluids. The model is a set of three equations for prediction of corrosion rate in straight pipe within temperature range of 5-150 oC. The effects of pH is introduced to the equations as a factor calculated at different temperatures and within different pH ranges using simple empirical

References

  • A. and Young, R. D. (2001). A model for calculating rates of general corrosion of carbon steel and 13%Cr stainless steel in CO2/H2S environments. CORROSION 2001, Houston, Tx, NACE International. Aballe, A., et al. (1999). Using wavelets transform in the analysis of electrochemical noise data. Electrochimica Acta. 44: p. 48054816.
  • Churchill, S.W.(1977). Friction factor equation spans all fluid-flow regimes,. Chem. Eng., 84: p. 91-92.
  • Gunaltun, Y. (1991). Carbon Dioxide Corrosion in Oil Wells. SPE 21330: pp.97-113.Jepson, W.P., S. Bhongrde, and M. Gopal (1996). Predictive Model for Sweet Corrosion in Horizontal Multiphase Slug Flow. . in NACE International.
  • Jepson, W.P., et al. (1997). Model for Sweet Corrosion in Horizontal Multiphase Slug Flow in CORROSION 97: NACE International.
  • Jones, L.W. (1992). Corrosion and Water Technology for Petroleum Products.: Oil and Gas Consultants International, Inc.
  • Mysara Eissa Mohyaldinn (2011). Development and Validation of Computational Models for Sand Erosion and Corrosion Prediction in Pipes and Fittings, PhD thesis, Universiti Teknologi PETRONAS. Nesic, S., J.-Y. Cai, and K.-L.J. Lee. (2005). A Multiphase Flow and Internal Corrosion Prediction Model for Mild Steel Pipeline. in CORROSION2005.: NACE International. NORSOK, NORSOK standard M-506 (2005): CO2 corrosion prediction model: Strandveien. Trimmer, W. and H. Hassan, (1997) sizing irrigation minerals and fittings.
  • Swidzinski, M., et al., (2000). Corrosion inhibition of wet gas pipelines under high gas and liquids velocities. in corrosion. Orlando.
  • Wang, H., J.-Y. Cai, and W.P. Jepson, (2002). CO2 Corrosion Modelling and Prediction of Horizontal Slug Flow. in CORROSION 2002: NACE International.
  • Waard, C.D. and D.E. Milliams, (1975). Carbonic Acid Corrosion of Steel. in Corrosion 31.
  • Waard, C.d., U. Lotz, and A. Dugstad, (1995). Influence of liquid flow velocity on CO2 corrosion: a semi-empirical model. in NACE CORROSION. Houston, Texas.

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