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PREDICTION MODELS FOR CO2 CORROSION OF OIL AND GAS FIELDS |
Guoan Zhang;Changfeng Chen;Minxv Lu;Yinshun Wu |
北京科技大学腐蚀与防护中心 |
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Abstract Several prediction models for CO2 corrosion of oil and gas fields have been reviewed. These models are mainly divided into three categories: empirical models, semi-empirical models and mechanistic models. Empirical models are based on laboratory or field data. They are simple and coincide with much of field data quite well. Semi-empirical models are developed according to chemical, electrochemical reactions kinetics and diffusion of species to and from the bulk phase. Then deviation from prediction models will be corrected by multiplying with factors. Mechanistic models are based on CO2 corrosion mechanism combining corrosion thermodynamics and kinetics with diffusion kinetics. Because there are many factors affecting CO2 corrosion and the CO2 corrosion mechanism is extremely complicated, it is quite difficult to develop an accurate universal prediction models. The present prediction models, including empirical models, semi-empirical models and mechanical models, are imperfect and need further improvement.
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Received: 18 October 2003
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Corresponding Authors:
Guoan Zhang
E-mail: zga2003@163.net
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