聚驱污水稀释聚合物溶液驱油效果可行性研究  

Research on Oil Displacement Feasibility of Polymer Solution Diluted by Polymer Flooding Sewage

作　　者：张继红[1] 徐思宁[1] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《石油化工高等学校学报》2016年第2期60-64,共5页Journal of Petrochemical Universities

基　　金：国家自然科学基金资助项目(51274070)

摘　　要：针对大庆油田聚合物驱过程中,清水用量日益紧张、采出污水处理难度加大、采出污水回注问题严重等现状,利用采出污水代替清水稀释聚合物溶液驱油受到普遍重视。本文针对聚驱污水的特点,通过聚驱污水和深度处理污水水质对比分析,确定利用曝氧和杀菌处理后的聚驱污水进行流动特性实验以及驱油实验。结果表明,与深度处理污水相比,处理后聚驱污水稀释的聚合物溶液残余阻力系数高,降低水相渗透率的能力增强,有利于提高采收率;相同渗透率、相同分子质量、相同浓度条件下,与深度处理污水稀释聚合物溶液的驱油效果相比还不理想,采收率提高值相差1%左右;若要达到与深度处理污水稀释的聚合物溶液驱油的效果,则应适当地提高聚驱污水稀释聚合物溶液的浓度。In the process of polymer flooding in daqing oilfield,there are some problems such as water consumption growing tensions,sewage treatment increasing more differences and the problem of injecting sewage becoming serious.Using the produced sewage instead of water to dilute polymer solution flooding will be widely attached.Aiming at the characteristics of polymer flooding sewage depth by polymer flooding sewage and sewage water quality analysis,polymer flooding sewage by oxygen exposure and sterilization was used to study flow characteristics and oil displacement effect.Results show that,compared with deep treatment sewage,residual resistance coefficient with polymer solution is high after polymer flooding sewage dilution,the ability to reduce water phase permeability is enhanced,and recovery factor is improved.Under the same conditions of permeability,molecular weight,concentration,and depth of sewage displacement effect of polymer solution is not ideal compared to dilute oil,and the value of recovery efficiency differs by about 1%.The same effect with the polymer flooding deeply produced by sewage dilutes can be achieved if the concentration of polymer solution diluted by the polymer flooding sewage is increased.

关 键 词：聚驱污水 深度处理污水 稀释 聚驱效果 

分 类 号：TE357[石油与天然气工程—油气田开发工程]