热化学就地生热促进稠油水热裂解实验研究  

Laboratory Study on Promotion of Aquathermolysis of Heavy Oil by in-situ Thermochemical Heat-generation

作　　者：胡绍彬[1] 刘永建[1] 蒋大丽[1] 赵杰[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,大庆163318

出　　处：《科学技术与工程》2010年第12期2853-2856,共4页Science Technology and Engineering

基　　金：教育部高等学校博士学科点专项科研基金项目(200802200001);国家大学生创新性实验计划项目(081022005);国家重大油气专项项目(2008ZX05012-001)资助

摘　　要：针对稠油就地水热裂解反应因地层温度有限而受影响的情况,开展了利用热化学就地生热提升地层温度促进稠油水热裂解反应的模拟实验。结果表明:向反应釜中注入5mL浓度为5mol/L的NaNO2/NH4Cl放热体系后,反应釜温度从200℃提升到了240℃以上,压力增加了近0.4MPa,反应后稠油降黏率增加了40%左右,饱和烃、芳香烃含量明显增加,胶质、沥青质含量明显降低,热化学生热提温可促进稠油水热裂解反应。分析认为现场热化学体系注入工艺可行、放热反应速度与"热峰"位置可控、对地层无伤害,热化学生热提温促进稠油就地水热裂解降黏具有可行性,具体应用时应深入分析热化学就地生热提温的影响因素并优化相关操作参数。Facing the problem of in-situ aquathermolysis of heavy oil （ATHO） being influenced by limited formation temperature, laboratory experiments were carried out to investigate the promotion of ATHO by raising formation temperature through thermochemical heat-generation （TCHG）. Results showed that with the injection of 5 mL solutions of 5 mol/L NaNO2/NH4Cl successively into the autoclave, the system temperature raised from 200℃ to above 240℃, the pressure increased about 0. 4 MPa, the viscosity reduction ratio of the heavy oil increased 40%, the contents of saturated and aromatic hydrocarbon fractions increased and the contents of resin and asphaltene fractions reduced obviously, confirming that the TCHG can promote the ATHO. Analysis showed that the field injection technique of thermochemical system is feasible, the heat-generating rate and the position of ＂thermal spike＂ can be controlled and the thermochemical system is unharmful to the formation. It is feasible to use TCHG to raise the formation temperature to promote the in-situ ATHO. When applied in field, the influencing factors on raising formation temperature by TCHG should be analyzed deeply and relative operation parameters should be optimized.

关 键 词：热化学 就地生热 稠油 水热裂解 实验研究 

分 类 号：TE254[石油与天然气工程—油气井工程] TE39