【摘 要】
：
为了解决稠油黏度大而难开采问题,采用自生热降黏解堵工艺技术,利用化学生热剂和催化水热裂解的协同作用,开采近井地带富含沥青质的稠油.结果表明:优化开发的自生热降黏解堵体系,以浓度为5 mol/L的NaNO2和NH4 Cl为产热剂、质量浓度为10 g/L的硼氢化钠为产氢剂、质量浓度为15 g/L的水热裂解催化剂为添加剂,体系产热温度最高达155℃,有效产气时间为27 min,稠油降黏率为70.1％.自生热降黏剂反应残液对黏土的防膨率稳定在45％以下,对石蜡的溶解度为31.4％,可以有效保护储层的渗透性,解除石
【机 构】
：
中国石油长庆油田分公司油气工艺研究院,陕西 西安 710000;中国石油长庆油田分公司第一采油厂,陕西 西安 710000;北京化工大学化工资源有效利用国家重点实验室,北京 100029
论文部分内容阅读
为了解决稠油黏度大而难开采问题,采用自生热降黏解堵工艺技术,利用化学生热剂和催化水热裂解的协同作用,开采近井地带富含沥青质的稠油.结果表明:优化开发的自生热降黏解堵体系,以浓度为5 mol/L的NaNO2和NH4 Cl为产热剂、质量浓度为10 g/L的硼氢化钠为产氢剂、质量浓度为15 g/L的水热裂解催化剂为添加剂,体系产热温度最高达155℃,有效产气时间为27 min,稠油降黏率为70.1％.自生热降黏剂反应残液对黏土的防膨率稳定在45％以下,对石蜡的溶解度为31.4％,可以有效保护储层的渗透性,解除石蜡堵塞和疏通输送管道.试验井降黏解堵施工应用结果表明,自生热降黏剂的解堵降黏效果有效期长达18月,累计增油量为520 t.
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