Alnoush Wajdi, Sayed Amr, Alyafei Nayef
Department of Petroleum Engineering, Texas A&M University at Qatar, Qatar.
MethodsX. 2019 Jul 12;6:1706-1715. doi: 10.1016/j.mex.2019.07.009. eCollection 2019.
Quantification of interfacial tension (IFT) and contact angles is essential to characterize reservoir fluid-fluid and rock-fluid interactions. However, these measurements are highly dependent on chemical structure, surface residues, system conditions, flow dynamics and interface interactions. Interfacial interactions are specifically important for secondary and tertiary oil recovery processes where water or brine is injected to recover residual oil through complex multi-phase - rock/brine/oil- interactions Due to the delicate interactions across the interfaces, these systems are subjected to variations and inconsistencies that might be difficult to eliminate, thus, affecting the reliability, reproducibility, and certainty of the data. Therefore, reliable measurements need to eliminate fundamental sources of error and remove surface contaminants. To optimize these measurements, the presented methods take a holistic approach to carefully and reliably optimize the procedure for interfacial tension and contact angle measurements for fluid-fluid and rock-fluid interaction studies at ambient conditions (22.0 ± 2 °C and atmospheric pressure). •The presented method ensures minimization of impurities that alter interfacial tension measurements;•Enhanced preparation for tested surfaces for contact angle measurements, and;•Optimization of procedure at ambient conditions.
界面张力（IFT）和接触角的量化对于表征油藏流体-流体以及岩石-流体相互作用至关重要。然而，这些测量高度依赖于化学结构、表面残余物、系统条件、流动动力学和界面相互作用。界面相互作用对于二次和三次采油过程尤为重要，在这些过程中，通过注入水或盐水，借助复杂的多相（岩石/盐水/油）相互作用来采出残余油。由于界面间存在微妙的相互作用，这些系统容易出现变化和不一致性，可能难以消除，从而影响数据的可靠性、可重复性和确定性。因此，可靠的测量需要消除基本误差源并去除表面污染物。为了优化这些测量，本文提出的方法采用整体方法，在环境条件（22.0 ± 2 °C和大气压）下，仔细且可靠地优化用于流体-流体和岩石-流体相互作用研究的界面张力和接触角测量程序。• 本文提出的方法确保将改变界面张力测量结果的杂质降至最低；• 加强对用于接触角测量的测试表面的预处理，以及；• 在环境条件下优化测量程序。
