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

在加拿大，目前正在实施化学驱油，以提高阿尔伯塔省东南部、萨斯喀彻温省西南部和劳埃德明斯特地区一些中稠油油藏的采收率。在三次采油作业中，将化学剂注入油井以提高采收率，但不同的油藏操作条件(例如，pH、温度、盐度以及碱和/或表面活性剂的存在)会影响聚合物的结构和大小。聚合物结构或尺寸的变化最终会损害增量采油性能和项目经济性，也会导致在回采水中准确检测和表征聚合物(从而实现最佳再利用)的难度。

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).