预交联体膨聚合物调剖驱油机理及效果评价  

Profile modification mechanism and enhanced oil recovery of precrosslinked polymer flooding

作　　者：石志成[1] 卢祥国[2] 

机构地区：[1]大庆油田有限责任公司第六采油厂,黑龙江大庆163114 [2]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《大庆石油学院学报》2007年第3期28-30,37,共4页Journal of Daqing Petroleum Institute

基　　金：中国石油天然气股份有限公司科技攻关项目(020202-2-2)

摘　　要：大庆油田部分区块注入水或聚合物溶液沿高渗透条带低效或无效循环,水驱和聚合物驱的驱油效果受到严重影响,为改善吸液剖面,利用微观驱替和物理模拟实验方法,对体膨聚合物的调驱机理和效果进行研究.结果表明,体膨聚合物颗粒在岩石喉道内形成的“桥堵”作用是其主要调剖机理,体膨聚合物对大孔道的封堵可以有效改善吸液剖面,扩大波及体积,进而提高水驱或聚合物驱的驱油效果,为完善体膨聚合物调剖技术提供了依据.Aiming at low efficiencies and inefficiencies circulating along the high permeability straps of injected water and polymer of partly block, the water flooding and polymer flooding is seriously affected. In order to improving the profile modification, the author has made some researches into the mechanism of profile modification and oil displacement and the effect of precrosslinked polymer by making use of microdisplacement and modern physical simulated experimental method. The experimental results show that the “bridge block” action, which is formed by particle of cubical dilatation granule in the pore throat, is main profile modification mechanism of precrosslinked polymer flooding. The block of cubical dilatation granule into the big pore throat can improve water injection profile actively and enlarge sweep volume, and improve oil displacement effect of water flooding and polymer flooding. These recognitions provide experimental stratum for further perfecting profile modification technique of precrosslinked polymer.

关 键 词：预交联体膨聚合物 微观驱替 非均质模型 调剖驱油机理 驱油效果 

分 类 号：TE341[石油与天然气工程—油气田开发工程]