摘要
西达里亚h1-1油藏DK15井组生产井含水率已高达90%,且多个注采井对之间存在着高渗条带,部分注水井存在注水效果不明显甚至无效注水的情况。交联聚合物驱技术是油田改善注水井开发效果,实现油藏稳产的有效手段。利用数值模拟软件对聚合物驱段塞组合,聚合物浓度以及注入速度等进行了模拟研究,结果表明在保证相同聚合物用量的条件下,多级聚合物凝胶段塞组合调剖效果最好;由于凝胶的吸附和滞留作用,注入速度应不能过大,否则容易使注压力超过地层破裂压力。在注水井井底流压不超过地层破裂压力的前提下,聚合物浓度并不是越高越好,应根据实际情况进行优化选择。
The producton well water cut of DK 15 well group in XIDALIYA reservoir has reached as high as 90 %,and more than one injection-production pair has high permeability channel.The waterflooding effect of part injection well is not obvious or even invalid.The cross-linking polymer flooding technology is an effective messure to improve development effectiveness and achieve stable production.By using numerical simulation software,polymer slug flooding,polymer concentration and the injection speed has been analyzed.The result show that the multi-stage polymer gel slug combination has the best effect.The injection rate should not be too large because of the gel adsorption and retention.On the premise of that the injection well bottom-hole pressure does not exceed the formation fracture pressure,the polymer concentration is not as high as possible,it should be based on the actual situation to optimize selection.
出处
《石油化工应用》
CAS
2013年第9期25-27,42,共4页
Petrochemical Industry Application
关键词
高渗条带
交联聚合物驱
吸附
滞留
地层破裂压力
数值模拟
high permeability channel
crosslinked polymer flooding
adsorption
retention
formation-parting pressure
numerical simulation
