非洲阿非利加和芋螺(Colocasian esculenta)替代羟乙基纤维素用于提高石油采收率的实验研究

Daraojiaku Augustine Ekene, Nwachukwu Angela Nkechi, Okereke Ndubuisi Uchechukwu, Ihekoronye Kingsley Kelechi, Uwaezuoke Nnaemeka
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摘要

聚合物充注是一种化学提高石油采收率的方法,通过向储层注入聚合物来采收经过初级和次级采收机制后仍留在储层中的石油,通过降低水的流动比率来提高石油采收率,并增加置换流体的粘度以提高储层的置换效率。合成聚合物被广泛应用于化学提高石油采收率。然而,这些聚合物成本高昂,会导致石油生产成本居高不下,而且由于这些聚合物的毒性,环境问题也备受关注。因此,有必要寻找对环境友好、成本较低且可作为提高石油采收率的流动性控制剂的本地聚合物。在这项研究中,我们进行了实验分析,以使用 Afzelia Africana 和 Colocasian esculenta 等本地聚合物提高碳氢化合物的生产率,并与合成聚合物羟乙基纤维素进行比较。对这些聚合物进行了表征(傅立叶变换红外光谱和扫描电镜),以确定其官能团和形态。还研究了这些聚合物的流变行为。对本地聚合物和合成聚合物进行了岩心注水实验,以检验这些聚合物在提高石油采收率方面的潜力。研究结果表明,样品含有羟基(OH)、羧基(COOH)和胺基(NH3)等官能团。扫描电子显微镜测试表明,样品具有介孔和结晶性质。流变学测试结果表明,样品具有剪切稀化行为,是一种非牛顿流体。岩心灌注实验表明,非洲藻的石油采收率分别为 8.4%、14.4% 和 17.6%。此外,在 0.2wt%、0.3wt% 和 0.4wt% 的不同聚合物浓度下,Colocasian esculenta 的采油率分别为 6.8%、14.0% 和 17.2%,而合成聚合物的采油率分别为 9.6%、14.8% 和 19.2%。研究结果表明,在提高石油采收率方面,本地聚合物与合成聚合物相比更胜一筹。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Investigation of the Suitability of Afzelia africana and Colocasian esculenta as Alternative to Hydroxyethyl cellulose in Enhanced Oil Recovery
Polymer flooding is a chemical enhanced oil recovery where polymer is injected into the reservoir to recover oil that remained in the reservoir after the primary and secondary recovery mechanisms, improves oil recovery by reducing the water mobility ratio and increases the viscosity of the displacing fluids for sweep displacement efficiency of the reservoir. Synthetic polymers are widely used chemical enhanced oil recovery. However, there is a big concern about the high cost of these polymers which can result to high cost of oil production and environmental concerns due to the toxic nature of these polymers. Hence, there is need to source for local polymers that can be environmentally friendly, less expensive and can serve as a mobility control agent in enhanced oil recovery. In this study, experimental analysis was carried out to improve hydrocarbon productivity using local polymers such as Afzelia Africana, Colocasian esculenta and compared with synthetic polymer Hydroxyethyl cellulose. Characterization (FTIR and SEM) of these polymers were carried out to determine the functional groups and the morphology. Rheological behavior of these polymers was investigated. Core-flooding experiment was conducted on the local polymers and the synthetic polymer to examine the potential of these polymers in enhanced oil recovery. The results of the study showed that the samples contained hydroxyl group (OH), carboxyl group (COOH), and amine (NH3) based on the functional groups. The scanning electron microscopy test showed that the samples are mesoporous and crystalline in nature. The rheology test results showed that the samples exhibit shear thinning behavior and a non-Newtonian fluid. The core-flooding experiment showed that Afzelia Africana had oil recovery of 8.4%, 14.4% and 17.6%. More so, Colocasian esculenta had oil recovery of 6.8%, 14.0% and 17.2% while the synthetic polymer had oil recovery of 9.6%, 14.8% and 19.2% for different polymer concentrations of 0.2wt%, 0.3wt% and 0.4wt% respectively. The results from this study showed that the local polymers compared favorably with the synthetic polymer in enhanced oil recovery.
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