Abstract
AbstractLow temperature oxidation Air injection has the advantages of low energy consumption and low environmental pollution, and is an important means of heavy oil development. In order to study the change characteristics of heavy oil in Ji 7 well area of Xinjiang oilfield and the feasibility of air injection for oil displacement, dynamic oil displacement experiments were carried out by using one-dimensional combustion tube. The heat release and heavy oil characteristics of Ji 7 heavy oil at different ignition temperatures were studied. Thermogravimetric analysis and differential scanning calorimetry experiments were carried out by using TG/DSC thermal analyzer, combined with component analysis and thermal component analysis. The exothermic law and reaction mechanism of low temperature oxidation of Ji 7 heavy oil at different temperatures were analyzed by analytical kinetics analysis method. The feasibility of low temperature oxidation flooding technology by air injection was evaluated according to the reservoir characteristics. The results show that the oxidation of Ji 7 heavy oil can be divided into three stages: low temperature oxidation (LTO), fuel deposition (FD) and high temperature oxidation (HTO). Weak self-exothermic phenomena can be detected after oxidation of Ji 7 heavy oil at 40 ~C. After oxidation at 180 ~C, the combustion and deposition stage of Ji 7 heavy oil has obvious characteristics, the low temperature oxidation stage weakens, the high temperature oxidation stage migrates to the direction of lower temperature, DTG and DSC peaks. The value is more obvious, and the peak value of mass loss and heat flux is larger. Under reservoir temperature and pressure conditions, the oxidation of heavy oil and air is weak. After oxidation and pressurization of Ji 7 heavy oil, the thermal effect of low temperature oxidation of heavy oil is remarkable. It is suggested that pressurization start air injection development at higher initial temperature (about 350 C).KeywordsAir injectionLow temperature oxidationHeavy oilThermal analysisJi 7 well area
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
