摘要
通过实验测定了部分水解聚丙烯酰胺(HPAM)溶液在流变仪中的流变性及通过多孔介质的流变性和残余阻力系数,计算了衰竭层厚度,用不同的浓度、注入速度和岩芯渗透率进行了驱油实验。提出了HPAM分子缠结作用的增强引起的表观粘度的增加或衰竭层厚度的降低使平行于油水界面的拉动残余油的力增加,能使残余油饱和度降低,采收率提高。HPAM溶液浓度的增加能增加表观粘度,降低衰竭层厚度;注入速度的增加能降低衰竭层厚度。不同浓度和不同注入速度情况下的驱油结果证实了HPAM分子缠结作用和衰竭层效应对残余油的作用机理。
The rheological behaviors of HPAM solution in a rheometer and in porous media and residual resistance factors were measured through experiments. Depleted layer thickness was calculated. Displacement experiments were proceeded with various concentration, injecting speed and core permeabilities. It is expounded that the increase of apparent viscosity or the decrease of depleted layer thickness generated by the overlap of HPAM molecules can increase the force parallel to oil-Water interface, which can pull more residual oil out and enhance oil recovery. With the concentration increase of HPAM solution, the apparent viscosities increase and the depleted layer thickness decrease. The increase of injecting speed can decrease depleted layer thickness. The flooding results with various concentrations and injecting speed affirmed the mechanism that the overlap effects and depleted layer effects of HPAM molecules act on residual oil.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2004年第1期161-164,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50174011)
