摘要
通过在微亲水人造岩心上开展的室内驱油物理模拟试验,探讨了毛管数对不同粘弹性聚合物溶液驱油效率及残余油饱和度的影响。同时,在相同毛管数条件下,研究了不同粘弹性聚合物溶液对其驱油效率及残余油饱和度的影响,得到了不同粘弹性条件下毛管数与驱油效率关系的一族曲线;比较系统地研究了不同粘弹性聚合物溶液下毛管数对驱油效率及残余油饱和度的影响规律,即在毛管数相同的条件下,聚合物溶液的粘弹性越高,体系的采收率越高,残余油饱和度越低,说明了聚合物溶液的弹性也是影响其提高采收率、降低残余油饱和度的重要因素。对进一步深入研究聚合物驱油机理和现场作业具有重要指导意义。
The influence of capillary numbers on polymer solutions with different viscoelasticities and residual oil saturation is studied by a laboratory physical simulation test of oil displacement on hydrophilic artificial cores.The effect of polymers with different viscoelaticities on oil displacement efficiency and residual oil saturation is also studied under the condition of same capillary numbers.A group of curves of the relation between capillary numbers and oil displacement efficiency are obtained under different viscoelaticities,the influence laws of polymer with different viscoelasticities on the displacement efficiency and residual oil saturation are more systematically investigated.That is under the condition of same capillary numbers,the higher the viscoelasticity of the polymer is,the higher the recovery factor of the displacing system is,the higher the residual oil saturation will be.This indicates that the polymer viscoelasticity is also one of the key factors influencing the enhanced oil recovery,reducing residual oil saturation,which is great significance of studying polymer displacement mechanism and field operation.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2007年第2期97-100,共4页
Journal of Oil and Gas Technology
基金
中国石油天然气集团公司石油科技中青年创新基金项目(05E7038)
国家西部开发科技行动计划重大攻关项目(2005BA901A13)
关键词
驱油试验
物理模拟
聚合物
驱油效率
驱替液
毛管数
粘弹性
oil displacement test
physical simulation
polymer
oil displacement efficiency
displacing fluid
capillary number
viscoelasticity
