基于静态实验的稠油低温氧化影响因素评价
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摘要
为了提高稠油火驱高温氧化的持续性,获得稠油氧化内在反应机制,保障燃烧顺利启动,对辽河油田某火驱试验区稠油油样进行静态反应釜低温氧化实验,研究了原油组分、温度、压力和含水饱和度等对低温氧化反应的影响,并用灰色关联法对氧化影响因素进行了评价。结果表明,原油中饱和烃和芳香烃的含量较高时,有利于原油低温氧化反应进行;随着温度上升,稠油低温氧化速率提高,尤其在170℃之后,增速明显增大;氧气分压升高,在相同的接触面积上有利于稠油低温氧化反应的进行;随着含水饱和度的增大,氧化反应程度呈下降趋势。用关联分析法对稠油低温氧化影响因素的排序表明,温度是影响低温氧化反应的首要因素。
In order to improve the persistence of high temperature oxidation during fire flooding,obtain the oxidation reaction mechanism of heavy oil,and ensure the smooth start of combustion,a series of static experiments of low temperature oxidation were carried out on heavy oil sample from a fire flooding test area of Liaohe oilfield. The effect of oil composition,temperature,pressure and water saturation on low temperature oxidation reaction were studied. The grey correlation method was used to evaluate the influence factors of oxidation. The results showed that high content of saturated and aromatic hydrocarbons in crude oil was contribute to the low temperature oxidation of crude oil. The low-temperature oxidation rate increased with increasing temperature.Especially after 170℃,the rate of growth increased significantly. High oxygen partial pressure promoted the reaction of low-temperature oxidation,because oxygen concentration increased on the same interface. As the water saturation increased,the degree of oxidation reaction showed a downward trend. Finally,the influence factors of low temperature oxidation were sorted by Gray correlation method. And temperature was the primary influenced factor of low temperature oxidation reaction.
In order to improve the persistence of high temperature oxidation during fire flooding,obtain the oxidation reaction mechanism of heavy oil,and ensure the smooth start of combustion,a series of static experiments of low temperature oxidation were carried out on heavy oil sample from a fire flooding test area of Liaohe oilfield. The effect of oil composition,temperature,pressure and water saturation on low temperature oxidation reaction were studied. The grey correlation method was used to evaluate the influence factors of oxidation. The results showed that high content of saturated and aromatic hydrocarbons in crude oil was contribute to the low temperature oxidation of crude oil. The low-temperature oxidation rate increased with increasing temperature.Especially after 170℃,the rate of growth increased significantly. High oxygen partial pressure promoted the reaction of low-temperature oxidation,because oxygen concentration increased on the same interface. As the water saturation increased,the degree of oxidation reaction showed a downward trend. Finally,the influence factors of low temperature oxidation were sorted by Gray correlation method. And temperature was the primary influenced factor of low temperature oxidation reaction.
引文
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[2]蒋海岩,袁士宝,李杨,等.稠油氧化阶段划分及活化能的确定[J].西南石油大学学报(自然科学版),2016,38(4):136-142.
[3]张瀚奭,郑家朋,张立民,等.高浅北区稠油油藏空气泡沫驱实验[J].油田化学,2014,31(4):527-530.
[4]王蕾,汤灵芝,张亮,等.稠油低温氧化动力学实验与模型研究[J].应用化工,2013,42(2):259-263.
[5]徐克明,曲大孜,董龙,等.火烧油层点火温度和稳定燃烧温度的计算方法[J].复杂油气藏,2013,6(2):81-83.
[6]程月.空气低温氧化原油组成和气体组成变化规律研究[D].黑龙江:哈尔滨工程大学,2007:15-30.
[7]KOK M V,KARACAN C O.Behavior and effect of SARA fractions of oil during combustion[R].SPE 66021-PA,2000:1-10.
[8]傅鹰.化学热力学导论[M].北京:科学出版社,1963:48-53.
[9]贝伦斯M,张继炎.化学反应工程=Chemischereaktionstechnik:第2版[M].中国石化出版社,1994:24-40.
[10]林伟民.地层原油及其族组分的氧化反应特性研究[J].应用化工,2011,40(9):1581-1584.
[11]龚姚进,户昶昊,宫宇宁,等.普通稠油多层火驱驱替机理及波及规律研究[J].特种油气藏,2014,12(6):83-86.
[12]寇建益.温度变化对原油低温氧化过程影响研究[D].北京:中国科学院研究生院(理化技术研究所),2008:48-55.
[13]付美龙,欧阳传湘,喻高明.稠油与高凝油油藏提高采收率技术[M].石油工业出版社,2013:325-327.
[14]刘印华.中原油田明15块空气泡沫驱实验研究[D].青岛:中国石油大学(华东),2011:51-57.
[15]尚绪柱.轻质原油注空气低温氧化特征研究[D].抚顺:辽宁石油化工大学,2009:14-16.