阳离子聚多糖MM-1作为驱油剂的物化性能研究  

Physicochemical Propertis of Cationic Polysaccharide MM-1 as EOR Polymer

作　　者：李云静[1] 孙宁[1] 周芳霞[1] 朱维群[1] 

机构地区：[1]胶体与界面化学教育部重点实验室(山东大学),山东济南250100

出　　处：《油田化学》2007年第2期150-153,共4页Oilfield Chemistry

摘　　要：测定了水溶性阳离子聚多糖（季铵基聚多糖）MS—1在粒径0．175～0．246mm的洗油油砂上的静态溶液吸附量，吸附等温线符合Langmuir吸附规律，温度对吸附量的影响小，25℃吸附量略大于60℃吸附量；MM-1的饱和吸附量远大于HPAM．25℃和60℃时分别为1592．1和1513.6μg／g。MM—1在油砂上的吸附量在pH=7．0时有最大值，随电解质硫酸钠加入量的增大（W44％）或MM-1阳离子度的增大（≤0．40）而不断增大并趋于平衡值。对产生以上实验结果的原因作了解释。在60℃吸附MM．1后分离出的油砂在蒸馏水中的zeta电位，随MM-1阳离子度的增大（0．05～0．40）而增大，由负值变正值．阳离子度为0．125时为零。MM-1在溶液中与原油和油砂的相互作用放热，放热量随MM-1浓度增大而增大，分别在浓度1．0g／L（与原油）和10g／L（与油砂）时出现最大值，此后趋于恒定。图8参14。The static adsorption of cationic polysaccharide, or quartenary ammonium salt of polysaccharide, MM-1 on deoiled reservoir sands of 0. 175-0.246 mm in diameter from aqueous solution is investigated and it is shown that the isotherms of adsorption fit to Langrnuir＇s equation; the experimental temperature has minor influence on the adsorption and the adsorption amount at 25℃ is slightly larger than that at 60℃ ; the saturation adsorption of MM-1 is much larger than that of HPAM polymers, being of 1592.1 and 1513.6/zg/g sands at 25℃ and 60℃, respectively. The adsorption of MM-1 on sands reaches a maximum at pH = 7.0 and increases continueously and finally approaches to an equilibrium value with increasing amout of Na2SO4 added （≤4%） or substitution degree （SD） by cationic functionalities （≤0.40）. The reasons for these experimental phenomena are discussed. The zeta potential of the reservoir sands with MM-1 adsorbed from aqueous solution at 60℃ is measured in distilled water and is shown to increase with increasing SD in range 0.05-0.40 from negative to positive values and to go through zero point at SD≈0. 125. The interactions of MM-1 in aqueous solution with crude oil and oily sands are exothermic and the heat of interaction increases with increasing MM-1 concentration, reaches a peak value at concentration 1.0 g/L （with crude oil） and 10 g/L （with oily sand） and then becomes constant.

关 键 词：阳离子聚糖 季铵基聚糖 阴离子度 溶液吸附 反应热 ZETA电位 油砂 原油 驱油聚合物 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] O636.1[理学—高分子化学]