二氧化碳溶解气对原油粘度的影响

利用高温高压油气水混合液粘度测量装置对原油及含二氧化碳气原油的粘温特性进行了实验研究,测量了不同气油比条件下油气混合液的粘度,分析了二氧化碳溶解气对原油粘度的影响。结果表明,在相同压力下,原油及其混合液粘度与温度存在指数关系,原油粘度与压力基本呈线性关系。在同一温度下,油气混合液的粘度在达到泡点压力之前随着压力的升高而降低;在达到泡点压力之后,随压力的升高而增大;油气混合液的粘度随气油比增加而减小;油气混合液的泡点压力随着含气量的增加和温度的升高而增大。

Effect of dissolved carbon dioxide on the viscosity of crude oil

The viscosity-temperature characters of the carbon dioxide-oil mixture were investigated with high-temperature and high-pressure viscometer. The viscosity of the oil-gas mixture with different gas-oil ratios was measured. The effect of the dissolved carbon dioxide on the viscosity of crude oil was analyzed. The viscosity of the carbon dioxide-oil mixture varies exponentially with temperature at the same pressure and varies linearly with pressure. At the same temperature, the viscosity of the mixture decreases with pressure rising before reaching the bubble point pressure and increases after reaching the bubble point pressure. The viscosity of the mixture decreases with the rise of gas-oil ratio. The bubble point pressure of the mixture rises with the increase of content of dissolved carbon dioxide and temperature.