摘要
通过物理模拟实验研究了不同渗透率级差条件下泡沫驱油体系提高采收率的能力.实验结果表明,泡沫虽然具有较好的封堵调剖能力,但泡沫的调剖能力具有一定的限制,在渗透率级差小于11.4∶1的条件下,泡沫体系具有良好的封堵调剖能力,能够大幅度提高非均质油藏的采收率;当渗透率级差大于11.4∶1时,泡沫体系的调剖能力逐渐变差;当渗透率级差达到17∶1左右时,泡沫调剖及提高采收率的能力都较差,低渗模型的动用程度较低,主要通过提高高渗模型的采出程度来提高采收率.
Through physical simulation test we have carried out the study of the ability of difference permeability grade with foam flooding enhance oil recovery.The experimentation proves that foam has the ability of block up and injection profile adjusting,but the ability get limit,on the condition of little permeability grade under 11.4∶1,the foam possess well ability of profile adjusting.It can greatly enhance heterogeneous reservoir oil recovery.When the value was bigger than 11.4∶1,the ability of enhancing oil recovery gradually reduces.When the permeability grade reaches to 17∶1,the ability to enhance oil recovery is poor,injecting enhance foam can enhance high permeable formation oil recovery,but the low permeable formation oil recovery is very little.
出处
《大庆石油学院学报》
CAS
北大核心
2008年第6期39-42,共4页
Journal of Daqing Petroleum Institute
基金
中国石油化工集团公司重大先导性项目(P03004)
关键词
泡沫驱
采收率
渗透率级差
调剖
封堵能力
压差
foam flooding
recovery
permeability grade
profile adjusting
ability to block up
pressure difference
