摘要
为了研究稠油泡沫驱和三元复合驱的微观驱油机理,利用微观仿真玻璃刻蚀模型进行了驱油实验,通过图像采集系统将驱替过程的图像转化为计算机的数值信号,然后采用图像分析技术进行对比研究.结果表明,泡沫驱对稠油的微观驱油机理有乳化作用、贾敏效应和泡沫的挤压剪切作用,而三元复合驱主要还是通过聚合物对管壁剩余油、盲端剩余油的拉、拽作用达到剥离稠油的目的.泡沫驱和三元复合驱相比,泡沫驱具有贾敏效应,能够对水流大通道进行有效封堵,从而提高了驱替剂的波及系数.三元复合驱虽然对稠油也具有较强的乳化作用,但是未观察到乳化捕集作用从而引起波及系数的提高.由于波及系数的提高对于开发稠油油藏极为有利,因此泡沫驱对提高稠油油藏采收率具有很大的优势.
In order to study the microscopic oil displacement mechanism of foam flooding and ASP flooding for heavy oil,oil displacement experiment is carried out by using microscopic artificial lithographic glass model.The images of oil displacement process are collected and transformed into numerical signals by a computer image collection system,and they are studied by using image analysis technology.The results show that there are three microscopic oil displacement mechanisms of foam flooding,which are emulsification effect,Jamin effect and extrusion and shearing effect of foam on heavy oil.While the mechanism of ASP flooding is that the polymer solution displace and carry the residual oil on the wall of micro pores and in the dead ends of pores mainly by shearing effect.Compared with ASP flooding,because of Jamin effect,foam flooding can effectively block the major large flowing channel and therefore enhance the sweep efficiency of the displacement agent.Although the ASP flooding also has a strong emulsification to heavy oil,the increase of sweep efficiency caused by emulsification is not observed.The improvement of sweep efficiency is extremely favorable for the development of heavy oil reservoir,so foam flooding has great advantages in improving the recovery factor of heavy oil.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2010年第1期53-56,共4页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家863项目"稠油油藏混气表面活性剂驱"(编号:2006AA06Z227)
教育部新世纪优秀人才计划(编号:NECT-07-0846)
霍英东教育基金优选资助课题(114016)
关键词
稠油
泡沫驱
三元复合驱
微观机理
heavy oil
foam flooding
ASP flooding
microscopic mechanism
作者简介
裴海华（1984-），男，博士，主要从事油田化学与提高采收率方面的研究．E-mail：peihaihua2008@126．com
