摘要
聚合物配注系统中过滤器和管线内壁存在黏性胶状物,它是注入水中微生物在系统内大量繁殖的产物,它不仅会对井筒附近区域储层孔隙造成堵塞,与聚合物溶液接触后还会引起聚合物溶液性质变化.通过采集杏树岗油田聚合物配注系统滋生胶状物,从中提取微生物,对其进行培养后得到微生物菌液.在此基础上,通过向聚合物溶液中添加微生物菌液来模拟微生物对聚合物分子链降解作用,并利用物理模拟方法开展了微生物对聚合物溶液渗流特性、驱油效率和驱油效果影响实验研究.结果表明：随微生物含量增加,聚合物溶液黏度降低,阻力系数和残余阻力系数减小;随微生物含量增加,聚驱采收率增幅减小;随聚合物浓度增加,微生物对聚合物溶液降解作用增强,采收率增幅下降.
There is viscous jelly exists in the filter and internal pipe wall in the system of polymer injection alloca- tion, that is the product of the microbial populations of the injection water in the system. It can not only clog up the reservoir pores near the wellbore, but also change the properties of the polymer solution after contacting with the so- lution. Through the collection of the spawned jelly in the polymer injection allocation system of Xingshugang Oil- field, the microbial liquid is got from the cultivating solution of the extracted jelly. On the basis of the above, the microbial degradation of the polymer molecular chains is simulated by adding the microbial liquid into the polymer solution, at the same time, the experimental studies of the micro-organism influences on the seepage properties, oil displaced efficiency and effects of the polymer solution are carried out by the physical simulation method. The re- sults show that with the rise of the microbial content, the polymer solution viscosity is reduced, and moreover the resistance coefficients and residual resistance coefficients are decreased as well. With the increase of the microbialcontent, the incremental degree of the polymer flooding recovery is decreased. With the increase of the polymer concentration, the microbial degradation on the polymer solution is enhanced and furthermore the dropped degree of the oil recovery are increased.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2014年第2期131-136,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
中国石油大庆油田重点科技项目“胶状物对油层孔渗性及聚驱注入体系有害微生物对开发效果的影响研究(DQYT-0504003-2011-JS)
关键词
大庆油田
聚合物驱
配注系统
微生物
黏性胶状物
物理模拟
机理分析
Daqing Oilfield
polymer flooding
injection distribution/allocation system
microbes
viscous jelly
physical simulation
mechanism analysis
