Oil recovery tests with ionic liquids: A review and evaluation of 1-decyl-3-methylimidazolium triflate  

作　　者：Alba Somoza Alberto Arce Ana Soto 

机构地区：[1]CRETUS,Department of Chemical Engineering,Universidade de Santiago de Compostela,E-15782,Santiago de Compostela,Spain [2]School of Engineering,Universidade de A Coruna,E-15403,Ferrol,Spain

出　　处：《Petroleum Science》2022年第4期1877-1887,共11页石油科学（英文版）

基　　金：the Ministry of Science and Innovation and State Research Agency for financial support throughout project PGC2018-097342-B-I00, including European Regional Development Fund。

摘　　要：The main advantages of the use of ionic liquids in enhanced oil recovery are their tunability and stability in harsh environmental conditions. In this work, a comprehensive review of ionic liquids proposed to improve current chemical oil recovery methods has been presented, focusing on core flooding experiments. With an almost infinite number of possible ionic liquids, the amount of experiments carried out up to now has been very limited. However, results are promising, with additional recovery after secondary flooding of up to 32% of the original oil in place. Most formulations with ionic liquids have been proposed for sandstone reservoirs, the number of studies with carbonate cores being very scarce. The possibilities of a new room temperature surface active ionic liquid, 1-decyl-3-methylimidazolium triflate,for this application were analyzed. It was shown that it is able to drastically reduce the water/oil interfacial tension. An optimized formulation was proposed for carbonate reservoirs. After secondary flooding with brine, an additional recovery of 10.5% of original oil in place was achieved at room conditions. A combination of the proposed method followed by a polymer flooding step with polyacrylamide led to a lesser but still significant recovery, reducing the costs associated to the ionic liquid.

关 键 词：Enhanced oil recovery(EOR) Ionic liquids Core flooding Interfacial tension 1-Decyl-3-methylimidazolium triflate 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]