Characterization of Ultra-High Molecular Weight Oilfield Polymers for Optimal Chemical Enhanced Oil Recovery Performance and Reuse of Produced Water

在加拿大，化学驱油目前正用于提高阿尔伯塔东南部、萨斯喀彻温西南部和阿尔伯塔地区一些中到稠油油藏的采收率。在cEOR操作中，将化学品注入威尔斯井中以提高油采收率，但不同的储层操作条件（例如pH、温度、盐度和碱和/或表面活性剂的存在）影响聚合物结构和尺寸。聚合物结构或尺寸的变化最终会损害增量采油性能、项目经济性，并且还导致其在回采水中的准确检测和表征（以及因此其最佳再利用）的困难。

In Canada, chemical flooding is currently being applied to increase recovery from a number of medium to heavy oil pools in southeast Alberta, southwest Saskatchewan and in the Lloydminster region. In cEOR operations, chemicals are injected into wells to increase oil recovery, but different reservoir operating conditions (e.g. pH, temperature, salinity and presence of alkali and/or surfactant) affect polymer structure and size. Changes in polymer structure or size ultimately compromise the incremental oil recovery performance, project economics, and also contribute to difficulties in its accurate detection and characterization in back produced water (and therefore its optimal reuse).