摘要
在模拟注蒸汽条件下，开展辽河油田杜84区块超稠油低温氧化反应实验，分析稠油黏度、SARA组成及气体产物的变化，探讨超稠油低温氧化反应的基本特征和机理．结果表明：杜84区块超稠油经过低温氧化反应后气体产物主要为CO2、CO和余O2，并有少量烃气、S02和H2S，余氧体积分数一般低于4％．在空气压力为0．25MPa时，超稠油低温氧化反应后黏度增大10％～40％，重质组分体积分数增加5．00％，其中，胶质质量分数降低2．00％～5．00％，沥青质质量分数增大5．00％～10．00％．超稠油低温氧化反应机理主要是芳烃加氧或聚合向胶质转化，胶质加氧或聚合向沥青质转化．
Simulation experiment of low temperature oxidation(LTO)reaction of Du84extra-heavy oil were carried out with the closed reactor under steam injection conditions,and the viscosity and SARA of reacted heavy oils and generated gases were measured,the characteristics and principles of LTO reaction for Du84extra-heavy oil were discussed.It shows that the content of heavy components and viscosity of Du84extra-heavy oil are increased after LTO reaction,the increase in heavy components are derived from the reduction in resin content and increase in asphaltene content.The generated gases in LTO reaction of Du84extra-heavy oil mainly comprise of residue O2,CO2 and CO,and tiny hydrocarbon gas,SO2 and H2S were found as well,the residue O2 content is lower than 4% under the given experimental conditions.At 0.25 MPa,the increase content of heavy components of Du84extra-heavy oil is about 5.00%as a result of 2.00%~5.00%reduction in resin content and 2.00%~5.00%increase in asphaltene content,and the increase in viscosity is about 10%to 40%.Based on the LTO experimental result of Du84extra-heavy oil,it could be inferred that the principles of LTO reaction related to oxidation and transfer of the aromatic to resin,and oxidation and transfer of resin to asphaltene.
出处
《东北石油大学学报》
CAS
北大核心
2015年第2期116-122,12,共7页
Journal of Northeast Petroleum University
基金
国家自然科学基金项目(51174041
51474227)
国家科技重大专项(2011ZX05012-004)
