Imidazolium-Based Ionic Liquids as an Anticorrosive Agent for Completion Fluid Design

作     者：Sugirtha Velusamy Sivabalan Sakthivel Lakshman Neelakantan Jitendra S.Sangwai 

作者机构：Petroleum Engineering Program Department of Ocean EngineeringIndian Institute of Technology Madras Department of Chemistry Madras Christian College Electrochemistry and Corrosion Lab Department of Metallurgical and Materials EngineeringIndian Institute of Technology Madras 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2017年第28卷第5期

页      面：949-961页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 

基　　金：the authors would like to extend their acknowledgment towards iit madras for its financial support throughout this research work.the authors would also like to extend their gratitude to dr.ramesh l.gardas for providing laboratory facility during ionic liquids synthesis.the final publication is available at springer via https://doi.org/10.1007/s 12583-017-0780-2 

主　　题：completion fluid corrosion electrochemical ionic liquid inhibition mild steel. 

摘      要：Most of the onshore and offshore oil and gas reservoirs are facing operational challenges due to high temperature and high salinity, thus requiring advanced techniques for realizing the ex- pected oil recovery with the use of specially designed chemicals. During oil and gas well development, completion fluids, which are solids-free liquids, are used to complete an oil or gas well. Completion flu- ids consisting of brines are primarily used for oil and gas well stabilization and are corrosive in nature. There is a need to develop additives to be added with completion fluids to address the corrosive nature. The present investigation involved the usage of two imidazolium ionic liquids （ILs） as corrosion inhibi- tors for mild steel in various completion brine （CaCI2, HCOOCs and ZnBr2） fluids. The study was per- formed using various techniques, such as, potentiodynamic polarization, weight loss measurements and exposure studies. All the above techniques showed promising results which indicated that the ILs as corrosion inhibitors used were of the mixed-type following both physisorption and chemisorption over the mild steel surface. Among the two inhibitors studied here, l-octyl-3-methyl imidazolium chlo- ride （[OMIM]^＋[CI]^-） with longer alkyl chain exhibited better inhibition efficiency and much lesser cor- rosion rate than 1-butyl-3-methyl imidazolium chloride （[BMIM]^＋[Ci]^-） with a shorter alkyl chain. The results obtained from various methodologies indicate that ionic liquids can be explored to develop anti-corrosive completion fluids suitable for oil and gas reservoirs.