The use of surfactant is one of the possible solutions to minimize the mobility of gases and improve the sweep efficiency, but the main problem with this process is its stability in the presence of injection water and crude oil under reservoir conditions. In this study, the three types of surfactant anionic, nonionic and amphoteric are examined in the presence of brine salinity at 96 °C and 1400 psia. To access the potential blended surfactant solutions as gas mobility control, laboratory test including aqueous stability, interfacial tension (IFT) and mobility reduction factor (MRF) were performed. The purpose of MRF is to evaluate the blocking effect of selected optimum surfactant solutions. Based on experimental results, no precipitation was observed by testing the surfactant solutions at reservoir temperature of 96 °C. The tested surfactant solutions reduced the IFT between crude oil and brine. The effectiveness and strength of surfactant solutions without crude oil under reservoir conditions were evaluated. A high value of differential pressure demonstrates that the strong foam was generated inside a core that resulted in delay in breakthrough time and reduction in the gas mobility. High mobility reduction factor result was measured by the solution of blended surfactant 0.6%AOS + 0.6%CA406H. Mobility reduction factor of other tested surfactant solutions was found low due to less generated foam by using CO₂ under reservoir conditions. The result of these tested surfactant solutions can provide the better understanding of the mechanisms behind generated foam stability and guideline for their implementation as gas mobility control during the process of surfactant alternating gas injection.

中文翻译：

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表面活性剂混合物配方在储层条件下控制气体流动性和泡沫传播的性能

使用表面活性剂是使气体的流动性最小化和提高吹扫效率的可能解决方案之一，但是此方法的主要问题是在储层条件下在注入水和原油存在下其稳定性。在这项研究中，在96°C和1400 psia的盐水盐度下，对三种类型的表面活性剂阴离子，非离子和两性表面活性剂进行了检测。为了获得潜在的混合表面活性剂溶液作为气体迁移率控制，进行了包括水稳定性，界面张力（IFT）和迁移率降低因子（MRF）在内的实验室测试。MRF的目的是评估所选最佳表面活性剂溶液的阻滞作用。根据实验结果，通过在96°C的储层温度下测试表面活性剂溶液未观察到沉淀。经测试的表面活性剂溶液降低了原油和盐水之间的IFT。评价了在储层条件下不含原油的表面活性剂溶液的有效性和强度。高的压差值表明在芯内部产生了强烈的泡沫，从而导致突破时间的延迟和气体迁移率的降低。通过混合表面活性剂0.6％AOS + 0.6％CA406H的溶液测量了高迁移率降低因子的结果。发现其他测试表面活性剂溶液的迁移率降低因子较低，原因是使用CO产生的泡沫较少 高的压差值表明在芯内部产生了强烈的泡沫，从而导致突破时间的延迟和气体迁移率的降低。通过混合表面活性剂0.6％AOS + 0.6％CA406H的溶液测量了高迁移率降低因子的结果。发现其他测试表面活性剂溶液的迁移率降低因子较低，原因是使用CO产生的泡沫较少 高的压差值表明在芯内部产生了强烈的泡沫，从而导致突破时间的延迟和气体迁移率的降低。通过混合表面活性剂0.6％AOS + 0.6％CA406H的溶液测量了高迁移率降低因子的结果。发现其他测试表面活性剂溶液的迁移率降低因子较低，原因是使用CO产生的泡沫较少₂在油藏条件下。这些经过测试的表面活性剂溶液的结果可以更好地理解所产生的泡沫稳定性背后的机理，并为将其作为表面活性剂交替注气过程中的气体迁移率控制实施提供指导。