In-Situ Combustion Simulation Experiment Based on Combustion of Crude Oil in Porous Media

Experiments of viscosity measurement and thermogravimetric analysis of crude oil were conducted to study the properties of viscosity and oxidation reaction kinetics parameters of crude oil.An indoor simulation experiment system of in-situ combustion was built,by which the ignition and stable combustion of crude oil in the porous medium were realized and the change of temperature was analyzed.The results show that crude oil viscosity decreases significantly with the drop of temperature,and the process of crude oil oxidation is divided into four stages,including light evaporation deposition,low-temperature oxidation reaction,sedimentation of fuel,and combustion.The ignition and stable combustion of crude oil in porous medium can be realized as the preheat temperature reaches 1 000 K.The highest burning temperature is up to 1 210 K,and the temperature in the center of combustion chamber stabilizes at about 750 K,which lasts for about four hours.It can be found that the combustion wave is difficult to move forwar