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《酸性有机钛交联剂的合成及在压裂液中的应用-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第31卷第6期精细化工Vo1.31.No.62014年6月FⅡECHEMICALSJune2014酸性有机钛交联剂的合成及在压裂液中的应用马悦,李小瑞,杨晓武,环灿灿(陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021)摘要:以钛酸丁酯为主剂,多元醇为络合剂合成了一种酸性有机钛交联剂,并以部分水解聚丙烯酰胺作为稠化剂,制备了部分水解聚丙烯酰胺压裂液。研究了交联剂中钛酸丁酯的质量分数,丙三醇与乳酸的质量比以及pH对冻胶交联延时、黏度的影响,得到较佳的合成条件。考察了质量分数为0.5%的部分水解聚丙烯酰胺,m(HPAM):m(有机钛)=100:0.5时,有机钛/
2、部分水解聚丙烯酰胺压裂液的性能,交联延时300S;在95℃,170S的条件下连续剪切90min,黏度保持在50mPa·s以上,体系耐温耐剪切性能良好;由线性黏弹性范围内动态频率扫描结果可知,G>G”,是典型的黏弹性流体;常温下,(压裂液):V(石英砂)=100:30时,沉降速度0.025mm/s;破胶后,破胶液黏度低于5.0mPa·S且残渣量较低,对储层伤害小。关键词:有机钛交联剂;部分水解聚丙烯酰胺;压裂液;延时性;流变性;油田化学品与油品添加剂中图分类号:TE357.12文献标识码:A文章编号:1003—5214(2014)06—0765—05SynthesisandApp
3、licationofAcidicOrganicTitaniumCross-LinkingAgentforFracturingFluidMAYue,LIXiao—rui,YANGXiao—WU,HUANCan-can(LaboratoryofAuxiliaryChemistry&TechnologyforChemicalIndustry,MinistryofEducation,ShaauxiUniversityofScience&Technology,Xian710021,Shaauxi,China)Abstract:Usingtetrabutyltitanateasthemai
4、nagent,polyhydricalcoholasthecomplexingagent,atypeofacidicorganic-titaniumcross—linkingagentwassynthesized,inwhichHPAMwasusedasathickener.Thestudyhasexaminedtheeffectsofthecontentofbutyltitanate,theratioofcomplexingagentandthepHvalueonthedelayedgellingandtheviscosity.Theperformanceoftheorgan
5、ictitanium/HPAMfracturingfluidshowsthat:thedelayedtimewas300S,theviscosityofthesystemwasstillhigherthan50mPa·Saftershearingfor90minatthetemperatureof95cCwiththeshearingrateof170S~,SOthefracturingfluidpossessedgoodtemperaturetoleranceandshearingresistance.Bytheresultsofthedynamicfrequencyscan
6、ning,G>G”,SOitisatypicalviscoelasticfluid.Whenthesandratiowas30%involume,settlingvelocitywas0.025mm/s.Itislessharmfultoreservoirbecausetheviscosityofthegelbreakingliquidislowerthan5.0mPa·Sandtheresiduecontentislowaftergelbreaking.Keywords:organic-titaniumcrosslinked;partiallyhydrolyzedpolyac
7、rylamide;fracturingfluid;delayedcrosslinking;rheologicalproperty;oil—fieldchemicalsandpetroleumadditivesFoundationitems:NationalNaturalScienceFoundationofChina(51373091);ScienceandTechnologyProjectsofXianyangCity(2013jk05一O6)目前,高温深井压裂施工已越来越普遍,这将使压裂
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