聚丙烯酰胺/柠檬酸铝胶态分散凝胶性质的研究

AN EXPERIMENTAL STUDY OF THE PROPERTIES OF A POLYACRYLAMIDE/ ALUMINUM CITRATE“ COLLOIDAL DISPERSION GEL”

用低浓度不同分子量的部分水解聚丙烯酰胺（ Ｈ Ｐ Ａ Ｍ） 和柠檬酸铝制备了胶态分散凝胶（ Ｃ Ｄ Ｇ） ，并用奥氏粘度计、超细粒度分析仪、岩芯流动实验对 Ｃ Ｄ Ｇ 的性质进行了研究．结果表明， Ｃ Ｄ Ｇ 的粘度比 Ｈ Ｐ Ａ Ｍ 粘度低，粒径在４５０ ～５２０ｎ ｍ 之间．岩芯流动实验结果表明， Ｃ Ｄ Ｇ 能够使岩芯的流动阻力大幅度增加，且在岩芯中达到同样的流动阻力所需通过 Ｃ Ｄ Ｇ 的体积与形成 Ｃ Ｄ Ｇ 的 Ｈ Ｐ Ａ Ｍ 的分子量、浓度及岩芯渗透率有关．

The colloidal dispersion gels ( C D G) were prepared by low concentration partiallyhydrolyzed polyacrylamide with different molecular weights and aluminum citrate. Theproperties of C D G were investigated by the Oswald capillary viscometer,ultrafine sizeanalyzer and theflow experiment. The resultsshowedthatthe viscosity of C D Gislowerthanthat of hydrolyzed polyacrylamide ( H P A M) and the viscosity of C D G decreases withincreasing the reaction time. The particle diameter of C D Gwith H P A M molecular weightsof4 ×106 and 1 4 ×107 was determined to be 460 and 510 nm , respectively . The flowresistance of C D G, which generally increased with increasing H P A M molecular weight andconcentration ,is much larger than that of H P A Msolutionsin the core . The flow resistanceofthe C D Gin lower permeability core was increased more quick than that of the C D Ginhigher permeability core. The flow resistance of C D Gin the core was associated with themoleculare weight and concentration of H P A Mand the permeability ofthe core . C D Gis abletoincrease the flow resistancein the core effectively .