Скачать или смотреть Dr. Junshi Tang - Research on oil oxidation process during oilfield air injection production process

High temperature oxidation (HTO) kinetics is very important for the propagation stability and combustion front temperature during in-situ combustion. This paper studied the HTO kinetics of different oils. Thermogravimetric analysis was used to study the HTO kinetics of oils with different viscosities. DSC, TGA and ARC were used in this paper. Oil samples with different viscosities were taken from air injection pilots of CNPC. Oxidation heat measurements of different samples and SARA fractions were carried out. Influence of pressure and oxygen fraction on HTO and LTO reaction heat was studied.
Oxidation test showed that oil samples with different viscosities have similar LTO reaction temperature range and HTO reaction temperature range. Heavy oil samples also have high LTO heat effect. The measured reaction heat of HTO by unit mass of coke is large than that of LTO by unit mass of oil. The fuel for HTO of light oil was much smaller compared with heavy oils, which made the peak reaction rate smaller than heavy oils. Kinetics parameters determined by single test curve method was not accurate due to the influence of determination process of reaction order. Iso-conversional methods can get the intrinsic kinetic parameters. Although the viscosities and compositions of oils were different, the HTO activation energies were more or less the same. The activation energy range for three oils was 130-154 kJ/mol. Kinetic cell and effluent gas analysis technique were used in this study. Fuel amount and fuel composition were calculated by the effluent CO2, CO and O2 concentrations. The results showed that fuels of HTO reactions were coke with very low hydrogen content. Heavy oil produced more coke than light oil. Although the viscosities and compositions of oils were different, the fuels for HTO reaction were similar. So, TGA analysis showed similar HTO kinetics for different oils.


Dr. Junshi TANG, associate professor of Research Institute of Petroleum Exploration and Development(RIPED), is the chief of air injection laboratory. His main research interests are heavy oil in-situ combustion and light oil air injection. Won two first prizes for scientific and technological progress of China Petroleum and Chemical Industry Federation, and one two prizes for scientific and technological progress of CPNC. Published more than 20 journal papers, obtained more than 10 invention patents. Dr. Tang will present to us "Research on oil oxidaiton process during oiflied air injection production process" and will tell us about the study the High temperature oxidation kinetics of oils with different viscosities using thermogravimetric analysis