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51313-02479-Corrosion Behavior of Typical Steels Under High Temperature and Pressure CO2-O2 Coexisting Condition

Product Number: 51313-02479-SG
ISBN: 02479 2013 CP
Author: Wei Liu
Publication Date: 2013
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In thickened oil recovery the high temperature and high pressure fluid is used and injected into the oil well. The corrosion environment for thickened oil recovery has two important characteristics one is that the environmental temperature and pressure around the oil well components are usually very high and another is that there is oxygen in the fluid. Due to the above two special characteristics the corrosion behavior of steels used for oil well components for thickened oil recovery is different from that under lower temperature and lower pressures. In order to control the corrosion of oil well components three typical steels were selected as tested materials i.e carbon steel low alloy steel and stainless steel. The high temperature and high pressure corrosion under CO2-O2 coexisting condition was conducted by autoclave and five high temperatures were selected according to the actual injected fluid condition. The corrosion rates for the three steels was obtained by mass-loss method and the corrosion morphologies were observed and analyzed by Scanning Electron Microscopy X-ray Diffraction Spectrum and Energy Dispersive Spectrometer. The corrosion behaviors under high temperature and high pressure condition was compared and analyzed among the three tested steels under the experimental conditions in detail. The research results are significant to selecting proper steels for thickened oil recovery well.

In thickened oil recovery the high temperature and high pressure fluid is used and injected into the oil well. The corrosion environment for thickened oil recovery has two important characteristics one is that the environmental temperature and pressure around the oil well components are usually very high and another is that there is oxygen in the fluid. Due to the above two special characteristics the corrosion behavior of steels used for oil well components for thickened oil recovery is different from that under lower temperature and lower pressures. In order to control the corrosion of oil well components three typical steels were selected as tested materials i.e carbon steel low alloy steel and stainless steel. The high temperature and high pressure corrosion under CO2-O2 coexisting condition was conducted by autoclave and five high temperatures were selected according to the actual injected fluid condition. The corrosion rates for the three steels was obtained by mass-loss method and the corrosion morphologies were observed and analyzed by Scanning Electron Microscopy X-ray Diffraction Spectrum and Energy Dispersive Spectrometer. The corrosion behaviors under high temperature and high pressure condition was compared and analyzed among the three tested steels under the experimental conditions in detail. The research results are significant to selecting proper steels for thickened oil recovery well.

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