【作者】 闻守斌；

【导师】 刘永建；

【作者基本信息】 大庆石油学院 ， 油气井工程， 2004， 硕士

【摘要】 我国稠油储量丰富，如何有效动用这部分储量是一个难题。稠油化学改质是解决这个难题的有效方法之一，尤其是稠油井下化学改质技术，可以从源头上解决问题。有学者针对辽河油田稠油进行了这方面的研究，并已进行了现场实验，但针对胜利油田稠油的井下化学改质研究未见报道。本文从催化降粘和脱硫两方面入手，在近似蒸汽吞吐的温度和介质条件下，对胜利油田单6东区块超稠油进行了化学改质研究。 在催化降粘方面，笔者制备了一种超强酸催化剂，在最佳反应条件下（稠油、水、催化剂质量比为100：30：0.05，温度260℃，反应时间24h），可使稠油粘度降低55.9％。并且在该催化剂作用下：稠油中碳数分布发生了明显变化，＜C₂₅与＞C₃₅分子数减少，C₂₅～C₃₅分子数增加；饱和烃、芳香烃含量增加，胶质、沥青质含量减少。红外光谱分析证明：超稠油经催化降粘反应后，其CH₂／CH₃值由3.45减小到3.05，芳香度（f_A）由0.301增加到0.364，说明在反应过程中，含芳环的化合物发生了部分脱烷基侧链的反应，这也可以从反应物中饱和烃与芳香烃的增加得到证实。本文还考察了阻聚剂、引发剂、溶剂、油层矿物和地层水对稠油催化降粘反应的影响。实验结果证明，除阻聚剂外，其它各物质均可与催化剂产生协同作用，不同程度地提高了稠油的降粘率。 在脱硫方面，笔者配制了一种脱硫剂，该剂可用于稠油的湿法氧化脱硫。使用该剂，在一定反应条件下（稠油100g，水30g，脱硫剂0.06g，温度260℃，反应时间24h），硫脱除率可达58.2％。将催化剂与脱硫剂共同作用于稠油，反应体系中各物质的添加量为：超稠油100g、水30g、催化剂0.05g、引发剂0.3g、溶剂0.4g、偏钒酸钠0.01g、碳酸钠0.0015g，反应时间24h。实验结果显示，在220℃～260℃范围内，稠油降粘率在80％以上，脱硫率不低于70％。 在室内实验的基础上，本文还研究了胜利超稠油井下脱硫降粘的现场实施方案。在技术原理、现场施工操作参数、现场实验效果评价等方面进行了初步的探讨。更多还原

【Abstract】 Heavy oil reserve is abundant in China. To produce this reserve effectively is difficult. Heavy oil chemical upgrading is one of the effective methods. The method of heavy oil down-hole chemical upgrading, which can solve the problem originally, is effective particularly. Some scholars have studied this method and done some field experiment on heavy oil from Liaohe oilfield. No research about this method in producing heavy oil from Shengli oilfield is reported. In this paper, the catalytic visbreaking and desulfuration of extra-heavy oil from Shengli oilfield is studied in the proximate conditions of cyclic steam stimulation.A super acid catalyst is prepared for catalytic visbreaking of heavy oil. After visbreaking, the viscosity of extra-heavy oil is reduced 55.9% in the optimum test conditions (260癈, 24hr). The optimum mass rate is: oil : water : cat. = 100 : 30 : 0.05. The <C25 molecules, >C35 molecules, resin and asphaltene in extra-heavy oil is decreased after catalytic visbreaking. The C25 --C35 molecules, saturated and aromatic hydrocarbon in extra-heavy oil is increased after catalytic visbreaking. The result of IR spectrum analysis shows: the CH2/CH3 of extra-heavy oil is decreased from 3.45 to 3.05 and the fA of extra-heavy oil is increased from 0.301 to 0.364. This result confirmed that aromatic compound in extra-heavy oil had broken its side chain alkylation. This reaction can also be confirmed by such fact that saturated and aromatic hydrocarbon in extra-heavy oil is increased after catalytic visbreaking. The synergetic effect of catalyst and polymerization inhibitor, initiator, solvent, reservoir mineral, formation water in catalytic visbreaking of extra-heavy oil have been reviewed in this paper. The experiments results shows that any mass, except polymerization inhibitor, has synergetic effect with catalyst and enhanced viscosity reduction rate of extra-heavy oil.A desulfuration reagent is prepared for wet and oxidation desulfuration of extra-heavy oil. The sulfide content of extra-heavy oil reduced 58.2% after treatmented by this reagent (oil : water : reagent = 100 : 30 : 0.06, 260℃, 24hr). The viscosity of extra-heavy oil is reduced more than 80% and The sulfide content of extra-heavy oil reduced not less than 70% when catalyst and desulfuration reagent coexist in reaction system (220℃~260℃,24hr). The optimum mass rate is:oil : water : cat. : initiator : solvent ". NaVO3 : Na2CO3=100 : 30 : 0.05 : 0.3: 0.4 : 0.01 : 0.0015.In this paper, the field conduct program of extra-heavy oil down-hole desulfuration visbreaking is studied based on lab research. The research include: technical principle, operated parameter, effectiveness assessment.更多还原