Summary This paper describes a thennodynamic model for asphaltene that captures the behavior of asphaltene precipitation during primary depletion. Precipitation occurs above the saturation pressure, reaches a maximum value around the saturation pressure, and decreases as the pressure drops further. The precipitated asphaltene is represented as a pure solid, with the oil and gas phases modeled with an equation of state (EOS). A validation of the model",:ith exp~rimental data is reported. A study of the sensitivity of the model to different parameters IS described.
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Nghiem et al. (1997) studied this question.
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