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摘要: 采用大庆、辽河两种稠油，研究了油藏矿物、硫酸镍催化剂以及四氢萘供氢剂对其水热裂解反应的影响。结果表明，与单纯水热裂解相比，油藏矿物的加入能使两种稠油的平均相对分子质量减小，饱和烃和芳香烃组分含量增加，胶质和沥青质组分含量减少，稠油的降黏率分别从7.41%和12.95%增加到16.05%和25.29%，油藏矿物对稠油水热裂解反应具有催化作用；将硫酸镍和四氢萘加入反应体系后，稠油平均相对分子质量进一步降低，族组分中饱和烃和芳香烃进一步增加，胶质和沥青质组分进一步减少，稠油黏度明显降低，降黏率可高达84.39%。Abstract: Through laboratory experiments with samples from Daqing and Liaohe oilfields, the effects of reservoir mineral, NiSO4 and tetrahydronaphthalene (THN) on the aquathermolysis (AT) of heavy oil were investigated. The results indicate that, in contrast with simple AT, the addition of reservoir minerals leads to lower average molecular weight, higher contents of saturated and aromatic hydrocarbon fractions and lower contents of resin and asphaltene fractions, and the viscosity reduction ratio of the two oil samples increases from 7.41% and 12.95% to 16.05% and 25.29% respectively, which means that reservoir minerals can catalyze the AT of heavy oil. With the addition of NiSO4 and THN into the reaction system, the average molecular weight of the reaction products decreases further, the contents of saturated and aromatic hydrocarbon fractions increase and the contents of resin and asphaltene fractions decrease further, the viscosity decreases greatly with a reduction ratio as high as 84.39%.
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Key words:
- heavy oil /
- aquathermolysis /
- reservoir mineral /
- catalysis /
- viscosity reduction
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