高岭土对聚丙烯酰胺静吸附与动滞留的影响

Influence of kaoline to static adsorption and dynamical retention of polyacrylamide

李宜强 曲成永

Li Yiqiang Qu Chengyong

中国石油大学提高采收率研究中心, 北京 102249; 大庆石油学院提高油气采收率教育部重点实验室, 黑龙江大庆 163318

Enhanced Oil Recovery Research Center of Chinese University of Petroleum, Beijing 102249; Key Laboratory of Enhanced Oil Recovery of Ministry of Education, Daqing Petroleum Institute, Daqing 163318

在三次采油领域里,吸附滞留量是影响化学剂驱油效果的关键因素之一。结合现场实施注聚采油工艺出现的各种问题,在基础理论的指导下,通过室内模拟实验45℃条件下,利用淀粉-碘化镉比色法研究了聚丙烯酰胺水溶液在不含油石英砂中的静态吸附及人造均质岩心中的动态滞留规律,并考察了高岭土对其滞留量产生的影响。实验结果表明,吸附等温线基本符合S型,溶液浓度在1 200 mg/L附近达饱和吸附;高岭土的存在使聚合物在石英砂中的吸附量及岩心中的滞留量增加,随着高岭土含量的增加,吸附滞留量由0.353 mg/g增加到0.794 mg/g。相同实验条件下,吸附量要远远多于滞留量。

During the tertiary oil recovery, volume of adsorption and retention is one of the key factors influencing the effect of polymer flooding.Combining with many problems occurred during polymer flooding on the working sites, under the guidance of the basic theories, the law of polyacrylamide adsorption statically in siliceous sand without oil and dynamical restoration in the artificial co re with starchcadmium iodide colorimetry have been studied by indoor simulation experiments at 45℃.In addition, the influence of kaoline on the retention volume has also been studied.The results show ed that adsorption isotherm was in accordance with "S" on the whole, saturation adsorption was achieved when the concentration of solution was about 1 200 mg/L.Polymer resorted more in the core and absorbed more on the surface of siliceous sand because of kaoline;in addition, the retention volume was increased from 0.353 mg/g to 0.794 mg/g with the increasing of kaoline.Under the same experimental conditions, the adsorption volume was higher than the retention volume.

https://doi.org/10.3969/j.issn.1008-2336.2010.02.072