出于对稠油火驱开发低温氧化阶段的原油与尾气变化特征深入认识之目的，利用

For the purpose of in-depth understanding of the characteristics of crude oil and tail gas changes in the low-temperature oxidation stage of heavy oil fire flooding development, low-temperature oxidation experiments under different temperature conditions were carried out using reactors, and crude oil physical properties, group components, functional groups, chromatographic fingerprints, Research on isotopes and exhaust gas components. <br><br>The research indicates that: (1) The low-temperature oxidation stage of the fire flooding of heavy oil is dominated by oxygenation, accompanied by a small amount of cracking reaction; (2) The physical properties of the crude oil become worse at the low-temperature oxidation stage of heavy oil below 200℃, at 200℃ The viscosity and density reach the maximum value, and then gradually decrease with the increase of temperature. This is mainly affected by the content of non-hydrocarbon, asphaltene and oxygen in the crude oil; (3) Due to the low degree of cracking, there is no carbon isotope between crude oil and group components. Obvious isotope fractionation occurred; (4) Exhaust gas data showed that oxygen-containing compounds such as aldehydes, ketones, alcohols or carboxylic acids were generated during the low-temperature oxidation process of heavy oil fire flooding. In this study, the change law of crude oil and tail gas during low-temperature oxidation of heavy oil fire flooding was explored, and the low-temperature oxidation reaction equation of heavy oil at different temperatures was calculated.

In order to gain an in-depth understanding of the characteristics of crude oil and exhaust gas changes in the low temperature oxidation phase of the development of heavy oil fire drive, the reactor was used to carry out low temperature oxidation experiments under different temperature conditions, and the study of crude oil properties, family parts, official energy groups, chromatography fingerprints, isotopes and exhaust gas parts was carried out.<br><br>The study indicates that: (1) heavy oil in the fire drive low temperature oxidation stage mainly oxygenation reaction, accompanied by a small amount of lysation reaction; The density reaches the maximum value, and then decreases gradually with the temperature increase, which is mainly affected by the content of non-hydrocarbons, asphalt and oxygen elements of crude oil, and (3) the carbon isotope fractionation of crude oil and family members does not occur due to the low degree of lysation. ;(4) exhaust data show that oxygen-containing compounds such as aldehyde, ketones, alcohols, or pyric acid are produced during low-temperature oxidation driven by heavy oil fire. In this study, the change law of crude oil and exhaust gas in the process of low temperature oxidation of heavy oil fire is explored, and the equation of low temperature oxidation reaction of heavy oil at different temperatures is calculated.

In order to understand the change characteristics of crude oil and tail gas in low temperature oxidation stage of heavy oil fire drive development, low temperature oxidation experiments at different temperatures were carried out in a reactor, and the physical properties, group composition, functional groups, chromatographic fingerprints, isotopes and tail gas components of the crude oil were studied.<br>The results show that: (1) oxygen addition is the main reaction in the low-temperature oxidation stage of heavy oil, accompanied by a small amount of cracking reaction; (2) the physical properties of heavy oil become worse in the low-temperature oxidation stage below 200 ℃, and the viscosity and density reach the maximum value at 200 ℃, and then gradually decrease with the increase of temperature, which is mainly affected by the contents of non hydrocarbon, asphaltene and oxygen elements in the crude oil; (3) the physical properties of heavy oil in the low-temperature oxidation stage of fire flooding are poor The carbon isotope of crude oil and group components did not show obvious isotopic fractionation when the cracking degree was low; (4) tail gas data showed that aldehyde, ketone, alcohol or carboxylic acid and other oxygen-containing compounds were formed during the low-temperature oxidation of heavy oil by fire flooding. In this study, the variation law of crude oil and tail gas in the process of low-temperature oxidation of heavy oil is explored, and the reaction equation of low-temperature oxidation of heavy oil at different temperatures is calculated.<br>