矿化度对疏水缔合聚合物溶液粘度的影响

Influence of salinity on the viscosity of hydrophobic associated polymer solution

在不同矿化度条件下,疏水缔合聚合物的增粘性能也不相同。在蒸馏水中,疏水缔合聚合物基本没有缔合效果;在氯化钠或氯化钙溶液中,在缔合临界矿化度之前,随着矿化度的增大,溶液粘度逐渐降低;在缔合临界矿化度之后,随着矿化度的增大,溶液粘度迅速升高,达到最大值后又逐渐下降。研究结果表明,胜利油区采出污水中均存在较高含量的钙、镁等高价离子,疏水缔合增粘效果较差,不适用于驱油。

Thickening behavior of hydrophobic associated polymer is different under different salinity conditions. In distilled water, associated effect of the hydrophobic associated polymer hardly appears. In solution of sodium chloride or calcium chloride, the solution viscosity is reduced gradually with the increase of salinity before the critical associated salinity; and after that critical salinity, solution viscosity is increased rapidly with increasing of solution salinity, and then fall down gradually after its maximum. The research shows that produced sewage in Shengli oilfield contains high content of calcium and/or magnesium highvalence ions with poor thickening effectiveness of hydrophobic association, so it is improper for oil displacement.