中文摘要：

聚合物不可人孔隙体积直接决定聚合物驱的波及系数，影响聚合物在孔隙介质中的流动性。采用单段塞法评价了岩心渗透率、部分水解聚丙烯酰胺相对分子质量、质量浓度、注入速度、温度、矿化度等因素对不可人孔隙体积的影响规律。结果表明：渗透率越高，部分水解聚丙烯酰胺分子可进入的孔隙体积分数增加，不可入孔隙体积分数越小；部分水解聚丙烯酰胺相对分子质量越大，平均分子链尺寸越大，分子线团能进入的孔隙体积分数越小，不可入孔隙体积分数越大；部分水解聚丙烯酰胺质量浓度越高，分子线团互相缠绕、重叠，流动速度减缓，在大孔隙中的吸附滞留量增加，地层残留的部分水解聚丙烯酰胺通过调剖作用使后续更多分子流入微小孔隙，不可入孔隙体积分数越小；随注入速度增大，注采压差增加，分子线团越容易流人相对狭小的孔隙中，不可人孔隙体积分数减小；随温度升高，分子内能增加，分子链卷曲更加厉害，且溶剂化作用减弱，水膜厚度减小，分子线团的体积变小，不可入孔隙体积分数减小；随矿化度增加，部分水解聚丙烯酰胺分子链会更加卷曲，不可人孔隙体积分数减小。聚合物不可入孔隙体积不但存在，而且不容忽视。

英文摘要：

The inaccessible pore volume of the polymer can directly determines the sweep efficiency of polymer flooding and furthermore influences the fluidity of the polymer in the porous media. The influences of the core per- mcabilities, relative molecular masses of partially hydrolyzed polyacrylamide, mass concentrations, injection speed, temperatures, salinities and so forth on the inaccessible pore volume are evaluated by single slug method. The results show that the higher the permeabilities are, the larger the accessible pore volume of the polymer molecule is, the less the inaccessible pore volume is ; the bigger the relative molecular mass of the polymer is, the larger the size of average molecular chain is, the less the accessible pore volume that molecular line-group can, the larger the inaccessible pore volume fraction is ; the higher the mass concentration of the polymer is, due to the in- ter-coiling and overlapping of the molecular line-group, the slower the flow velocity is, the more the absorbed and retained volume in big pores is, the more succeeding molecules after the profile control for the remained polymer can filtrate into the micro-pores, the less the the inaccessible pore volume fraction is with the increase of the input speed, the pressure differentials of both injection and production rise, the molecular line-group is more and more prone to flow into the relatively narrow pores, so the inaccessible pore volume fraction can be reduced with the rise of the temperature, the inner energy of the molecules enhances, the wrapped degree of the molecular chains becomes more serious, and moreover the solvation action turns weak, the thickness of the water film changes thin, the volume of the molecular line-group becomes small, the inaccessible pore volume fraction decreases little ; with the enhancement of the salinities, the wrapped degree of the polymer molecule chains becomes more serious, the fractions of the inaccessible pore volume turn small. The inaccessible pore volume of the polymer not only exi