CuSO₄/NaOH 催化稠油原位水热改质规律研究

The heavy oil has enormous resource potential, but its poor fluidity makes the extraction difficult. The in-situ upgrading technology aims to decrease the heavy oil viscosity and enhance the oil recovery by the hydrothermal cracking reaction. The transition metal was used as catalyst in in-situ upgrading technology. The composite catalyst including inorganic salt and alkali was been proposed based on the mechanism study of hydrothermal cracking reaction. The composite catalyst solve the disadvantages of low catalytic efficiency and have the advantages of low cost and easy injection, which have a wide application prospect. This work used the response surface methodology to analyze the impact of composite catalyst ratio, reaction temperature and pressure. It was found that the response surface methodology can predict the upgrading results accurately, and excessive or insufficient CuSO₄ concentration and reaction temperature were not suitable for improving the upgrading efficiency, while increasing NaOH concentration didn’t have a negative impact.