西安石油大学学报（自然科学版）2024，Vol.39Issue(4)：48-55,8.DOI:10.3969/j.issn.1673-064X.2024.04.007
注入气类型对沥青质沉积影响实验研究
Experimental Study on Influence of Injected Gas Type on Asphaltene Deposition
摘要
Abstract
In order to clarify the deposition characteristics of asphaltene under different injected gas media,the asphaltene deposition measurement experiments under the injection of N2,CH4 and CO2 were carried out by using developed high-temperature high-pressure visual asphaltene deposition measurement device,and the effects of injected gas type and gas pressure on the mass fraction,deposition rate and particle size of asphaltene deposition were quantitatively evaluated.The results show that under the same injected gas pressure(9 MPa)and mole fraction(10％),When injecting CO2,the mass fraction of crude oil asphaltene deposition is the highest(0.086％),followed by CH4(0.067％),and the lowest(0.04％)when injecting N2,which is similar to the deposition amount without gas injection(0.035％).The deposition rate of asphaltene increases first and then decreases with the increase of oil and gas contact time.The average particle size of asphaltene aggregates is 4.4 μm and 7.3 pm under the action of CH4 and CO2,and the average parti-cle size is 2.2 μm and 1.7 pm respectively with injection of N2 and without gas injection.N2 has the least impact on asphaltene deposi-tion,while CO2 has the greatest impact on asphaltene deposition,and the impact of CH4 is between the two.The thermodynamic model of asphaltene can accurately predict the mass fraction of asphaltene deposition when injecting three gas media,with an error of less than 18.2％compared to experimental results.关键词
沥青质沉积/注气介质/沉积速率/注气压力/颗粒粒径Key words
asphaltene deposition/injected gas/deposition rate/gas injection pressure/size of asphaltene deposition particles分类
能源科技引用本文复制引用
袁洁,雷琳,姚楠,张鑫,刘平,龙小泳,柴睿..注入气类型对沥青质沉积影响实验研究[J].西安石油大学学报（自然科学版）,2024,39(4):48-55,8.基金项目
国家重点研发计划"CO2驱油技术及地质封存安全监测"(2018YFB0605500) （2018YFB0605500）
