Barrabino Albert, Holt Torleif, Lindeberg Erik
Petroleum Department, SINTEF Industry, NO-7465 Trondheim, Norway.
CO₂ Technology AS.
Nanomaterials (Basel). 2018 Aug 8;8(8):603. doi: 10.3390/nano8080603.
Graphene oxide, nanographene oxide and partially reduced graphene oxide have been studied as possible foam stabilizing agents for CO₂ based enhanced oil recovery. Graphene oxide was able to stabilize CO₂/synthetic sea water foams, while nanographene oxide and partially reduced graphene oxide were not able to stabilize foams. The inability of nanographene oxide for stabilizing foams was explained by the increase of hydrophilicity due to size decrease, while for partially reduced graphene oxide, the high degree of reduction of the material was considered to be the reason. Graphene oxide brine dispersions showed immediate gel formation, which improved foam stability. Particle growth due to layer stacking was also observed. This mechanism was detrimental for foam stabilization. Gel formation and particle growth caused these particles to block pores and not being filterable. The work indicates that the particles studied are not suitable for CO₂ enhanced oil recovery purposes.
氧化石墨烯、纳米氧化石墨烯和部分还原氧化石墨烯已作为基于二氧化碳的强化采油中可能的泡沫稳定剂进行了研究。氧化石墨烯能够稳定二氧化碳/合成海水泡沫，而纳米氧化石墨烯和部分还原氧化石墨烯则无法稳定泡沫。纳米氧化石墨烯无法稳定泡沫的原因被解释为由于尺寸减小导致亲水性增加，而对于部分还原氧化石墨烯，材料的高还原度被认为是原因。氧化石墨烯盐水分散体显示出立即形成凝胶，这提高了泡沫稳定性。还观察到由于层堆叠导致的颗粒生长。这种机制对泡沫稳定不利。凝胶形成和颗粒生长导致这些颗粒堵塞孔隙且不可过滤。这项工作表明所研究的颗粒不适合用于二氧化碳强化采油目的。
