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时间:2019-05-22
《油气田固井用磷石膏基胶凝材料研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、学兔兔www.xuetutu.com全国中文核心期刊新鲤建巍中国科技核心期刊油号田固井用磷石青基胶凝材料硼夯华苏东-,何玉鑫,姚晓,诸华军:,彭园,胡婷,王亚军(1.南京工业大学材料科学与工程学院,江苏南京210009;2.盐城工学院材料工程学院,江苏盐城224051)摘要:通过评价不同龄期样品的抗压强度、线膨胀率、孔隙率和微观形貌等,研究磷石膏基胶凝材料(PGS)应用于固井工程上的可行性。实验结果表明,按磷石膏(PG)】:增强材料(Kz)]:州增强材料(GH)】:m(水泥):m(生石灰)=50:22:6:20:2制备PGS,在5O℃和80℃恒温水浴养护1d的PGS固化体抗压强度分别为
2、14.5、18.5MPa;在50℃恒温水浴养护28d的PGS固化体膨胀率较净浆水泥石提高了874.4%;PGS固化体总孔隙率(23.46%)较油井水泥石降低了34.0%,且渗透率明显低于净浆水泥石(1.32~10ixmz);掺1%降滤失剂BXF200一L的PGS浆体的滤失量为78mL,稠化时间为235min;在5O℃恒温水浴养护2d的PGS固化体抗压强度为14.5MPa,80℃恒温水浴养护1d抗压强度为13.9MPa,基本满足固井施工的要求。关键词:磷石膏;胶凝材料;固井;抗压强度;可行性中图分类号:TQ177.3+75文献标识码:A文章编号:1001—702X(2012)11-007
3、1—05Studyonthebasicpropertiesofphosphogypsum-basedcementitiousmaterialintheoilwellcementingHUASudonga,HEYuxin,YA0Xiao,ZHUHuajun,PENGYuan,HUTing,WANGYajun(1.CollegeofMaterialsScienceandEngineering,NamingUniversityofTechnology,Naming210009,Jiangsu,China;2.SchoolofMaterialEngineering,YanchengInstit
4、uteofTechnology,Yancheng224051,Jiangsu,China)Abstract:Toanalysisthefeasibilityofphosphogypsum-basedcementitiousmaterial(PGS)intheuseofcementing,thepropertiesofPGSwereinvestigatedbymeasuringthecompressivestrength,linearexpansionrate,theporosity,andthemicroscopyoffracturesurface.Resultsshowed,PGSw
5、aspreparedbyblendingphosphogypsum,slag,reinforcedmaterial(GH),oilwellcement,andlimeataconstantproportionwhichwas50:22:6:20:2(massratio),the1-daycompressivestrengthsin50℃and80℃thermostaticwaterbathwere14.5MPaand18.5MPa,respectively;the28一daysolidexpansionratein50℃thermostaticwaterbathWasincreased
6、by874.4%comparedtopurecementstone;theporosityofhardenedPGS(23.46%)wasdecreasedby34.0%contrastedwithcementstonewhosepermeability(1.32x10ixm~)washigherobviously.WhenthecontentofBXF200一Lwas1%wt,thewaterlossofPGSslurrywas78mL.andthickeningtime(235min).The2-daycompressivestrengthsin50℃thermostaticwat
7、erbathwas14.5MPa,andthe1-daycompressivestrengthsin80℃thermostaticwaterbathwas13.9MPa,thesepropertiesmeettheconstructionrequirementofcementing.Keywords:phosphogypsum;cementitiousmaterial;cementing;compressivestrength;feasibil
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