Imidazolium-based ionic liquids as an anticorrosive agent for completion fluid design

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 expected oil recovery with the use of specially designed chemicals. During oil and gas well development, completio...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of earth science (Wuhan, China) China), 2017-10, Vol.28 (5), p.949-961
Hauptverfasser: Velusamy, Sugirtha, Sakthivel, Sivabalan, Neelakantan, Lakshman, Sangwai, Jitendra S.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 961
container_issue 5
container_start_page 949
container_title Journal of earth science (Wuhan, China)
container_volume 28
creator Velusamy, Sugirtha
Sakthivel, Sivabalan
Neelakantan, Lakshman
Sangwai, Jitendra S.
description 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 expected 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 fluids 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 inhibitors for mild steel in various completion brine (CaCl 2 , HCOOCs and ZnBr 2 ) fluids. The study was performed 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, 1-octyl-3-methyl imidazolium chloride ([OMIM] + [Cl] - ) with longer alkyl chain exhibited better inhibition efficiency and much lesser corrosion rate than 1-butyl-3-methyl imidazolium chloride ([BMIM] + [Cl] - ) 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.
doi_str_mv 10.1007/s12583-017-0780-2
format Article
fullrecord <record><control><sourceid>wanfang_jour_proqu</sourceid><recordid>TN_cdi_wanfang_journals_dqkx_e201705016</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><wanfj_id>dqkx_e201705016</wanfj_id><sourcerecordid>dqkx_e201705016</sourcerecordid><originalsourceid>FETCH-LOGICAL-c348t-7cf9a123f858f60267eeccc657316a2e7e529e83fd2b0a9c88851d4c2d524f013</originalsourceid><addsrcrecordid>eNp1kMtLAzEQxoMoWGr_AG8LHjxFM9nNJnuU4qNQ8GKht5DmsaTuo022vv56U1bQi8PAzOH3fcN8CF0CuQFC-G0EykSOCXBMuCCYnqAJiJJjAFifpr3kBS4EX5-jWYxbkiqnXACfoNWi9UZ99Y0_tHijojWZ7zuvs8bvD97ETKXuUg9e9yH00b_ZTNW2GzLXh0z37a6xQ5Jkrkl8Zmz0dXeBzpxqop39zClaPdy_zJ_w8vlxMb9bYp0XYsBcu0oBzZ1gwpWEltxarXXJeA6lopZbRisrcmfohqhKCyEYmEJTw2jhCORTdD36vqvOqa6W2_4QunRRmv3rh7Q0RUIYgTKRVyO5C_3-YOPwi0LFSEGrIj_6wUjp9GkM1sld8K0KnxKIPEYtx6hl8pXHqCVNGjpqYmK72oY_zv-KvgHZhIC5</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1950429431</pqid></control><display><type>article</type><title>Imidazolium-based ionic liquids as an anticorrosive agent for completion fluid design</title><source>Springer Nature - Complete Springer Journals</source><source>Alma/SFX Local Collection</source><creator>Velusamy, Sugirtha ; Sakthivel, Sivabalan ; Neelakantan, Lakshman ; Sangwai, Jitendra S.</creator><creatorcontrib>Velusamy, Sugirtha ; Sakthivel, Sivabalan ; Neelakantan, Lakshman ; Sangwai, Jitendra S.</creatorcontrib><description>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 expected 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 fluids 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 inhibitors for mild steel in various completion brine (CaCl 2 , HCOOCs and ZnBr 2 ) fluids. The study was performed 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, 1-octyl-3-methyl imidazolium chloride ([OMIM] + [Cl] - ) with longer alkyl chain exhibited better inhibition efficiency and much lesser corrosion rate than 1-butyl-3-methyl imidazolium chloride ([BMIM] + [Cl] - ) 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.</description><identifier>ISSN: 1674-487X</identifier><identifier>EISSN: 1867-111X</identifier><identifier>DOI: 10.1007/s12583-017-0780-2</identifier><language>eng</language><publisher>Wuhan: China University of Geosciences</publisher><subject>Additives ; Biogeosciences ; Brines ; Calcium chloride ; Chains ; Chemisorption ; Chlorides ; Corrosion ; Corrosion inhibitors ; Corrosion prevention ; Corrosion rate ; Earth and Environmental Science ; Earth Sciences ; Fluids ; Gas wells ; Geochemistry ; Geology ; Geotechnical Engineering &amp; Applied Earth Sciences ; High temperature ; Inhibitors ; Ionic liquids ; Ions ; Liquids ; Low carbon steels ; Natural gas ; Offshore ; Offshore drilling rigs ; Offshore engineering ; Oil ; Oil recovery ; Oil reservoirs ; Petroleum ; Reservoirs ; Saline water ; Solvents ; Steel ; Temperature requirements ; Weight loss measurement ; Well development</subject><ispartof>Journal of earth science (Wuhan, China), 2017-10, Vol.28 (5), p.949-961</ispartof><rights>China University of Geosciences and Springer-Verlag GmbH Germany 2017</rights><rights>Journal of Earth Science is a copyright of Springer, 2017.</rights><rights>Copyright © Wanfang Data Co. Ltd. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c348t-7cf9a123f858f60267eeccc657316a2e7e529e83fd2b0a9c88851d4c2d524f013</citedby><cites>FETCH-LOGICAL-c348t-7cf9a123f858f60267eeccc657316a2e7e529e83fd2b0a9c88851d4c2d524f013</cites><orcidid>0000-0003-1862-5722</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://www.wanfangdata.com.cn/images/PeriodicalImages/dqkx-e/dqkx-e.jpg</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12583-017-0780-2$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12583-017-0780-2$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Velusamy, Sugirtha</creatorcontrib><creatorcontrib>Sakthivel, Sivabalan</creatorcontrib><creatorcontrib>Neelakantan, Lakshman</creatorcontrib><creatorcontrib>Sangwai, Jitendra S.</creatorcontrib><title>Imidazolium-based ionic liquids as an anticorrosive agent for completion fluid design</title><title>Journal of earth science (Wuhan, China)</title><addtitle>J. Earth Sci</addtitle><description>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 expected 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 fluids 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 inhibitors for mild steel in various completion brine (CaCl 2 , HCOOCs and ZnBr 2 ) fluids. The study was performed 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, 1-octyl-3-methyl imidazolium chloride ([OMIM] + [Cl] - ) with longer alkyl chain exhibited better inhibition efficiency and much lesser corrosion rate than 1-butyl-3-methyl imidazolium chloride ([BMIM] + [Cl] - ) 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.</description><subject>Additives</subject><subject>Biogeosciences</subject><subject>Brines</subject><subject>Calcium chloride</subject><subject>Chains</subject><subject>Chemisorption</subject><subject>Chlorides</subject><subject>Corrosion</subject><subject>Corrosion inhibitors</subject><subject>Corrosion prevention</subject><subject>Corrosion rate</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Fluids</subject><subject>Gas wells</subject><subject>Geochemistry</subject><subject>Geology</subject><subject>Geotechnical Engineering &amp; Applied Earth Sciences</subject><subject>High temperature</subject><subject>Inhibitors</subject><subject>Ionic liquids</subject><subject>Ions</subject><subject>Liquids</subject><subject>Low carbon steels</subject><subject>Natural gas</subject><subject>Offshore</subject><subject>Offshore drilling rigs</subject><subject>Offshore engineering</subject><subject>Oil</subject><subject>Oil recovery</subject><subject>Oil reservoirs</subject><subject>Petroleum</subject><subject>Reservoirs</subject><subject>Saline water</subject><subject>Solvents</subject><subject>Steel</subject><subject>Temperature requirements</subject><subject>Weight loss measurement</subject><subject>Well development</subject><issn>1674-487X</issn><issn>1867-111X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kMtLAzEQxoMoWGr_AG8LHjxFM9nNJnuU4qNQ8GKht5DmsaTuo022vv56U1bQi8PAzOH3fcN8CF0CuQFC-G0EykSOCXBMuCCYnqAJiJJjAFifpr3kBS4EX5-jWYxbkiqnXACfoNWi9UZ99Y0_tHijojWZ7zuvs8bvD97ETKXuUg9e9yH00b_ZTNW2GzLXh0z37a6xQ5Jkrkl8Zmz0dXeBzpxqop39zClaPdy_zJ_w8vlxMb9bYp0XYsBcu0oBzZ1gwpWEltxarXXJeA6lopZbRisrcmfohqhKCyEYmEJTw2jhCORTdD36vqvOqa6W2_4QunRRmv3rh7Q0RUIYgTKRVyO5C_3-YOPwi0LFSEGrIj_6wUjp9GkM1sld8K0KnxKIPEYtx6hl8pXHqCVNGjpqYmK72oY_zv-KvgHZhIC5</recordid><startdate>20171001</startdate><enddate>20171001</enddate><creator>Velusamy, Sugirtha</creator><creator>Sakthivel, Sivabalan</creator><creator>Neelakantan, Lakshman</creator><creator>Sangwai, Jitendra S.</creator><general>China University of Geosciences</general><general>Springer Nature B.V</general><general>Petroleum Engineering Program, Department of Ocean Engineering,Indian Institute of Technology Madras, Chennai 600036, India%Petroleum Engineering Program, Department of Ocean Engineering,Indian Institute of Technology Madras, Chennai 600036, India</general><general>Department of Chemistry, Madras Christian College, Chennai 600045, India%Electrochemistry and Corrosion Lab, Department of Metallurgical and Materials Engineering,Indian Institute of Technology Madras, Chennai 600036, India</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7ST</scope><scope>7TN</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>H8D</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KR7</scope><scope>L.G</scope><scope>L6V</scope><scope>L7M</scope><scope>M2P</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>SOI</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope><orcidid>https://orcid.org/0000-0003-1862-5722</orcidid></search><sort><creationdate>20171001</creationdate><title>Imidazolium-based ionic liquids as an anticorrosive agent for completion fluid design</title><author>Velusamy, Sugirtha ; Sakthivel, Sivabalan ; Neelakantan, Lakshman ; Sangwai, Jitendra S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c348t-7cf9a123f858f60267eeccc657316a2e7e529e83fd2b0a9c88851d4c2d524f013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Additives</topic><topic>Biogeosciences</topic><topic>Brines</topic><topic>Calcium chloride</topic><topic>Chains</topic><topic>Chemisorption</topic><topic>Chlorides</topic><topic>Corrosion</topic><topic>Corrosion inhibitors</topic><topic>Corrosion prevention</topic><topic>Corrosion rate</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Fluids</topic><topic>Gas wells</topic><topic>Geochemistry</topic><topic>Geology</topic><topic>Geotechnical Engineering &amp; Applied Earth Sciences</topic><topic>High temperature</topic><topic>Inhibitors</topic><topic>Ionic liquids</topic><topic>Ions</topic><topic>Liquids</topic><topic>Low carbon steels</topic><topic>Natural gas</topic><topic>Offshore</topic><topic>Offshore drilling rigs</topic><topic>Offshore engineering</topic><topic>Oil</topic><topic>Oil recovery</topic><topic>Oil reservoirs</topic><topic>Petroleum</topic><topic>Reservoirs</topic><topic>Saline water</topic><topic>Solvents</topic><topic>Steel</topic><topic>Temperature requirements</topic><topic>Weight loss measurement</topic><topic>Well development</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Velusamy, Sugirtha</creatorcontrib><creatorcontrib>Sakthivel, Sivabalan</creatorcontrib><creatorcontrib>Neelakantan, Lakshman</creatorcontrib><creatorcontrib>Sangwai, Jitendra S.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Environment Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science &amp; Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies &amp; Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric &amp; Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>Aerospace Database</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Advanced Technologies &amp; Aerospace Database</collection><collection>ProQuest Advanced Technologies &amp; Aerospace Collection</collection><collection>Earth, Atmospheric &amp; Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering Collection</collection><collection>ProQuest Central Basic</collection><collection>Environment Abstracts</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>Journal of earth science (Wuhan, China)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Velusamy, Sugirtha</au><au>Sakthivel, Sivabalan</au><au>Neelakantan, Lakshman</au><au>Sangwai, Jitendra S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Imidazolium-based ionic liquids as an anticorrosive agent for completion fluid design</atitle><jtitle>Journal of earth science (Wuhan, China)</jtitle><stitle>J. Earth Sci</stitle><date>2017-10-01</date><risdate>2017</risdate><volume>28</volume><issue>5</issue><spage>949</spage><epage>961</epage><pages>949-961</pages><issn>1674-487X</issn><eissn>1867-111X</eissn><abstract>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 expected 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 fluids 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 inhibitors for mild steel in various completion brine (CaCl 2 , HCOOCs and ZnBr 2 ) fluids. The study was performed 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, 1-octyl-3-methyl imidazolium chloride ([OMIM] + [Cl] - ) with longer alkyl chain exhibited better inhibition efficiency and much lesser corrosion rate than 1-butyl-3-methyl imidazolium chloride ([BMIM] + [Cl] - ) 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.</abstract><cop>Wuhan</cop><pub>China University of Geosciences</pub><doi>10.1007/s12583-017-0780-2</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0003-1862-5722</orcidid></addata></record>
fulltext fulltext
identifier ISSN: 1674-487X
ispartof Journal of earth science (Wuhan, China), 2017-10, Vol.28 (5), p.949-961
issn 1674-487X
1867-111X
language eng
recordid cdi_wanfang_journals_dqkx_e201705016
source Springer Nature - Complete Springer Journals; Alma/SFX Local Collection
subjects Additives
Biogeosciences
Brines
Calcium chloride
Chains
Chemisorption
Chlorides
Corrosion
Corrosion inhibitors
Corrosion prevention
Corrosion rate
Earth and Environmental Science
Earth Sciences
Fluids
Gas wells
Geochemistry
Geology
Geotechnical Engineering & Applied Earth Sciences
High temperature
Inhibitors
Ionic liquids
Ions
Liquids
Low carbon steels
Natural gas
Offshore
Offshore drilling rigs
Offshore engineering
Oil
Oil recovery
Oil reservoirs
Petroleum
Reservoirs
Saline water
Solvents
Steel
Temperature requirements
Weight loss measurement
Well development
title Imidazolium-based ionic liquids as an anticorrosive agent for completion fluid design
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-09T22%3A14%3A43IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-wanfang_jour_proqu&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Imidazolium-based%20ionic%20liquids%20as%20an%20anticorrosive%20agent%20for%20completion%20fluid%20design&rft.jtitle=Journal%20of%20earth%20science%20(Wuhan,%20China)&rft.au=Velusamy,%20Sugirtha&rft.date=2017-10-01&rft.volume=28&rft.issue=5&rft.spage=949&rft.epage=961&rft.pages=949-961&rft.issn=1674-487X&rft.eissn=1867-111X&rft_id=info:doi/10.1007/s12583-017-0780-2&rft_dat=%3Cwanfang_jour_proqu%3Edqkx_e201705016%3C/wanfang_jour_proqu%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1950429431&rft_id=info:pmid/&rft_wanfj_id=dqkx_e201705016&rfr_iscdi=true