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采用ＫＳＣＮ作示踪剂，测定了高分子量聚丙烯酰胺（ＨＰＡＭ）５８℃时在辽河油田油砂岩芯中的不可及孔隙体积．分析结果表明，随着ＨＰＡＭ浓度的增加，不可及孔隙体积也增加；油砂的孔隙率越高，不可及孔隙体积越小．表明ＨＰＡＭ在油砂中将有更高的驱油效率．
Using KSCN as tracers, the unobservable pore volume of high molecular weight polyacrylamide (HPAM) in oil sands cores of Liaohe Oilfield at 58 ℃ was measured. The results show that with the HPAM concentration increases, the inaccessible pore volume also increases; the higher the porosity of the oil sands, the less accessible the pore volume. This shows that HPAM will have higher oil displacement efficiency in oil sands.