含聚污水配制超高分聚合物溶液实验研究

发布时间：2018-11-18 08:15

【摘要】：目前油田聚驱规模的不断扩大,油田用水量紧张和采出水外排污染急需解决,如果解决这个问题,就能使油田污水得以循环利用。针对大庆油田采油五厂区块已进入高含水阶段,聚合物采油的投入产出比逐渐加大的问题。本文通过理论分析、仪器检测和室内物理模拟研究,对不同含聚浓度污水配制超高分聚合物溶液的粘度、抗剪切性、粘弹性、稳定性、分子线团尺寸等性能参数、注入能力和驱油效果进行了实验研究。结果表明,物化污水配制并稀释的超高分聚合物溶液性能优于生化污水配制的超高分聚合物溶液;在溶剂水水质相同的前提下,聚合物溶液配制浓度越大,其阻力系数和残余阻力系数越大;污水中残留聚合物具有一定的增粘性能,在聚合物干粉浓度相同前提下,所配制的聚合物溶液粘度随污水中残留聚合物浓度升高而增大,驱油效果也逐渐增强。经过对比分析,含聚浓度600mg/L污水配制稀释超高分聚合物体系在所研究水质体系配制的聚合物溶液中性能及驱油效果最优。综合考虑矿场实际情况,建议采用含聚浓度为600mg/L污水配制稀释超高分聚合物体系,既能节约聚合物干粉用量、简化含聚污水的处理工艺,又能达到理想的驱油效果。
[Abstract]:At present, the scale of polymer flooding in oil field is expanding, the water consumption of oil field is tight and the pollution of produced water is in urgent need to be solved. If this problem is solved, the oilfield sewage can be recycled. In view of the high water cut in the block of No. 5 Oil production Plant in Daqing Oilfield, the ratio of input and output of polymer oil production is increasing gradually. In this paper, the viscosity, shear resistance, viscoelasticity, stability and size of molecular coils of ultra-high polymer solution prepared from wastewater containing different concentration of polymer are studied by theoretical analysis, instrumentation and laboratory physical simulation. The injection ability and oil displacement effect are studied experimentally. The results showed that the properties of the ultrahigh content polymer solution prepared by physicochemical wastewater and diluted were better than that of the super high content polymer solution prepared by biochemical wastewater. When the solvent water quality is the same, the larger the concentration of polymer solution is, the greater the resistance coefficient and residual resistance coefficient are. The viscosity of the polymer solution increased with the increase of the residual polymer concentration, and the oil displacement effect increased gradually. Through comparison and analysis, the properties and oil displacement effect of diluted ultra-high content polymer system prepared with 600mg/L wastewater were optimized in the polymer solution prepared by the studied water quality system. Considering the actual situation of mine field, it is suggested that using polymer concentration as 600mg/L wastewater to prepare the super high content polymer system can not only save the amount of polymer dry powder, simplify the treatment process of polymerized sewage, but also achieve an ideal oil displacement effect.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.46

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