摘要
对于聚合物驱后不同类型的剩余油需要采取有针对性的开采方法。开展了井网加密与高质量浓度聚驱相结合的矿场试验研究,针对大庆油田北二东剩余油主要分布在分流线附近和薄差油层的特征,通过井网加密改变液流方向挖掘分流线剩余油,通过高质量浓度聚驱进一步扩大波及体积挖掘薄差油层剩余油。选取9注16采试验区,确定井网井距和注入参数,进行跟踪调整和效果评价。结果表明:聚驱后高质量浓度聚驱渗流阻力增加,流度控制增强,见到增油降水效果,目前提高采收率5.3%,预测到试验结束可提高采收率6.77%。
For various types of remained oil after the polymer flooding,it is needed for the specific producing methods for the oils.The researches are conducted on the integrated field test between the well infilling and highconcentration/mass polymer flooding,in the light of the main distribution characteristics nearby the distributary streamlines and in the thin-poor oil layers for the remained oil in Block North 2E of Daqing Oilfield,the former oil is tapped by means of changing fluid flowing direction thanks to the well infilling;for the latter,it is produced by the further enlarged swept volume with the help of the high-concentration polymer flooding.The testing block with 9injectors and 16 producers is chosen to determine the well spacing and injecting parameters,and furthermore the following adjustment and effect evaluation are figured out.The achievements show that after the high-concentration/mass polymer flooding,both the seepage resistance and mobility control are increased and some good effects are achieved,including oil increment and water cut reduction.At present,the oil recovery is enhanced by 5.3% and moreover the predicted EOR can reach 6.77% at the end of the test.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2016年第3期94-98,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项"大型油气田及煤层气开发"(2011ZX05010)
关键词
聚合物驱后
井网加密
高质量浓度聚合物驱
流度控制
提高采收率
after polymer flooding
well infilling
high-concentration/mass polymer flooding
mobility control
EOR
