基于自组织的两亲聚合物驱油剂的渗流特性研究

Study on seepage characteristics of amphiphilic polymer oil displacement agent with self-organization behavior

针对大庆油田所应用的两亲聚合物,利用化学驱模拟评价装置研究了其渗流特性,得出了其在多孔介质中的渗流规律以及部分影响因素。结果表明,同浓度的两亲聚合物比HPAM的阻力系数和残余阻力系数更大;两亲聚合物比HPAM具有更大的粘弹性,具有更强的抗剪切性,并且在多孔介质中流动存在胀流性的行为;两亲聚合物的浓度越高,阻力系数和残余阻力系数越高;粘度随着老化时间的增长先增加后减小,在增加阶段,老化时间越长,阻力系数和残余阻力系数越大;岩心的渗透率越小,残余阻力系数越大。

Characteristics of amphiphilic polymer used in Daqing oilfield was studied with chemical flooding simulation evaluation device and its seepage rule and some influence factors were obtained.The results showed that the resistance coefficient and residual resistance coefficient of amphiphilic polymer were bigger than that of HPAM when their concentration were the same;Compared with HPAM,amphiphilic polymer was more viscoelastic,has more resistance of shearing ability and has dilatancy when flowed in porous media;The higher the concentration was,the bigger resistance coefficient and residual resistance coefficient was;viscosity first increased and then reduced and the resistance coefficient and residual resistance coefficient increase as aging time growed when viscosity increase;The residual resistance coefficient increase as the permeability of core decrease.