Status and progress of worldwide EOR field applications

Efficiency and bacterial diversity of an improved anaerobic baffled reactor for the remediation of wastewater from alkaline-surfactant-polymer (ASP) flooding technology

“…ASP flooding technology uses alkali, surfactant and polymer agents to displace crude oil [2], and the mean recovery is significantly improved compared with the water flooding method [3]. ASP flooding technology has been applied in China, India, Russia, Canada and other countries [4]. Although ASP flooding technology has greatly improved the recovery rate of crude oil, remediation of the process water is an inevitable issue [5,6] limiting further development of the technology.…”

Experimental investigation of immiscible water-alternating-gas injection in ultra-high water-cut stage reservoir

“…Enhanced oil recovery (EOR) methods in the ultra-high water-cut period include chemical flooding, thermal oil recovery, and gas flooding (Liu et al, 2020). At present, the most popular EOR method for saline reservoirs is water flooding (You et al, 2018;You et al, 2019;Zhang et al, 2019), as it is difficult to use chemical flooding in the high salinity environment of reservoirs.…”

“…Thus, gas fingering can be controlled, the gas front becomes more stable (which effectively prolongs the time required for the gas to break through to the oil well), and the sweep efficiency improves; in turn, this effectively improves the recovery factor. The WAG flooding technology has been tested and applied in many oil fields around the world, and has been found to significantly reduce the water saturation and increase the recovery rate by up to 10% (Christensen et al, 2001;Afzali et al, 2018;Liu et al, 2020).…”

“…To date, most scholars have focused on the flow control ability of WAG flooding. Physical simulations and pore network simulations are widely used in the study of microscopic seepage laws (Heiba et al, 1984;Oren et al, 1992;Oren, 1994;Oren and Pinczewski, 1996;Pereira et al, 1996;Sohrabi et al, 2004;Wang et al, 2019;Zhu et al, 2019;Liu et al, 2020;Wang et al, 2020). Glass-etched models and highdefinition imaging technology are used to observe the fluid seepage laws and distribution characteristics of reservoirs of different wettability during the WAG flooding process.…”

Design and Exploration of the Interfacial Rheological Properties of Lipopeptide Composite Weak Base ASP Flooding in Experimental Teaching

“…验证、数据分析为主，较少与最新的科研项目或现代技术结合，使得现有的物理化学实验课程内容 过于陈旧，无法与时俱进，也无法真正培养学生解决实际问题的能力。因此，有必要设计一个具有 科研价值又紧贴实际的特色创新性实验，更新目前的课程体系，提高学生学习兴趣和创新能力。 近年来，有关新型三元复合驱体系的研究越来越多。为了克服传统三元复合驱中结垢严重、破 乳困难、成本过高 [1] 等问题，目前已开发出脂肽/石油磺酸盐复配型弱碱三元复合驱。该复合驱体系 具有腐蚀性弱、结垢轻、对油藏伤害小等特点，已开始在油田部分区块投入使用。 其中脂肽生物表面活性剂具有降低油、水界面张力的特性，该体系是保证弱碱三元复合驱开发 效果的有效途径之一 [2,3] 。 本实验主要研究单因素对三元体系界面流变性质的影响，涉及到溶液的配制，界面扩张粘弹性 测试仪的调试和使用，以及SPSS软件的数据分析。实验使用的药品无毒无腐蚀性，均来自油田现场， 易取易用，实验操作简单，易于上手，适合本科教学。测试仪器可直接观看液滴振荡效果，清晰直 观，易于激发学生的学习兴趣。实验后的数据处理还可以培养学生数学统计和数据处理的能力。该 实验配制三元体系需0.5 h，测试各体系数据，需2.5 h，共计3 h，可以保证4学时的实验时间。同 时，可以进一步对实验体系进行适当调整，例如增加频率、温度等因素对扩张参数的影响测试，全 面分析各因素对界面流变性质的影响，或采用界面张力驰豫的测试模式，研究体系微观的驰豫过程， 由此实验设计为6-8学时的综合实验，根据实验容量和实验难度满足不同教学层次所需的课时要求。…”