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Influence of asphaltene inhibitors on asphaltene deposition in the porous media
Indian Journal of Chemical Technology ( IF 0.5 ) Pub Date : 2021-08-05
Arnab Mandal, Vikas Mahto, Subodh Purohit, M C Nihalani

This article deals with organic asphaltene deposition in the reservoir rock, for crude oil having high asphaltene content and high apparent viscosity. The crude oil is characterized using thermal analysis through the thermogravimetric method. Crude oil is blended with heptane and flooded through the formation core at 55°C and 200-1200 psi pressure. With the rise in flow pressure, asphaltene precipitation became more significant with about four hundred times fall in the initial flow rate (flow rate at 200 psi) of crude oil at 1200 psi pressure. Phthalic acid and turpentine oil are used as asphaltene inhibitors for this crude oil. These asphaltene inhibitors are easy to procure, required less dosage for asphaltene dissolution and are relatively less toxic as compared to the other organic solvents used frequently as asphaltene inhibitor in oil industries. The asphaltene inhibitors are injected into the crude oil and flowed through the pores of the core. It is found that the crude oil treated with phthalic acid resulted in 88.23% increment its flow rate as compared to the turpentine oil, suggesting significant organic asphaltene dissolution in the formation rock.

中文翻译:

沥青质抑制剂对多孔介质中沥青质沉积的影响

本文针对具有高沥青质含量和高表观粘度的原油,研究油藏岩石中有机沥青质的沉积。通过热重法使用热分析表征原油。原油与庚烷混合并在 55°C 和 200-1200 psi 压力下通过地层核心。随着流动压力的升高,沥青质沉淀变得更加明显,原油在 1200 psi 压力下的初始流量(200 psi 时的流量)下降了约 400 倍。邻苯二甲酸和松节油用作这种原油的沥青质抑制剂。这些沥青质抑制剂很容易获得,与石油工业中经常用作沥青质抑制剂的其他有机溶剂相比,需要较少的沥青质溶解剂量并且毒性相对较低。沥青质抑制剂被注入原油并流过岩心的孔隙。发现用邻苯二甲酸处理的原油与松节油相比,其流速增加了 88.23%,表明地层岩石中有机沥青质显着溶解。
更新日期:2021-08-05
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