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时间:2020-03-27
《胶凝含蜡原油的连续剪切实验研究.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43卷第5期当代化工Vo1.43.NO.52014年5月ContemporaryChemicalIndustryMay.20l4胶凝含蜡原油的连续剪切实验研究韩洪升,宋灵剑,管庆安,湛志国。,董莹莹(1.东北石油大学石油工程学院,黑龙江大庆163318;2.胜利油田高原石油装备有限责任公司,山东东营257091;3.中国石油化工股份有限公司辽宁葫芦岛分公司,辽宁葫芦岛125000;4.大庆油田有限责任公司采油四厂第二油矿五区五队,黑龙江大庆163318)摘要:胶凝含蜡原油由于其蜡晶的三维网状空间结构,具有复杂的流
2、变性。胶凝原油的流变性质一直是研究的重点和热点。很多学者对胶凝原油的性质做了详细而又深入的研究,但这些研究一般集中在恒定剪切速率上,对胶凝原油的连续剪切的研究较少。通过控制不同的降温速率和胶凝温度,来研究胶凝原油连续剪切的变化规律。实验结果表明,当降温速率越大时,初始的粘度越小,但剪切一段时问后,不同降温速率下的粘度无多大差别;当胶凝温度越低是,其初始的结构强度越大,并且在结构破坏以后,在同一剪切速率下,其粘度也越大,但不同温度下的差距在减小;当从高到低的剪切情况下,其粘度随着剪切速率的减小,呈增大的趋势,并且这趋
3、势越来越明显,相对于从低到高的剪切情况下,在同一剪切速率下,从低到商情况下的粘度比从高到低的粘度要大。关键词:胶凝原油;连续剪切;触变性中图分类号:TE624文献标识码:A文章编号:1671—0460(2014)05—0736—03ExperimentStudyonContinuousShearingofGelledWaxyCrudeOilHANHong—sheng,SONGLing-jian,GUANQing—aH,ZHANZhi-guo,DONGYing-ying4(1.CollegeofPetroleumEn
4、gineering,NortheastPetroleumUniversity,HeilongjiangDaqing163318,China;2.ShengliOilfieldHighlandPetroleumEquipmentCo.Ltd.,ShangdongDong~ng257091,China;3.SinopecHuludaoBranch,LiaoningHuludao125000,China;4.DaqingOilfieldNo.4OilProductionPlant,HeilongjiangDaqing16
5、3318,China)Abstract:Gelledwaxycrudeoi1hascomplexrheologicalpropertybecauseofthree—dimensionalnetworkofwaxcrystalinthegelledwaxycrudeoil.Researchontherheologicalpropertyofthegelledwaxycrudeoilisthekeypointandhotpoint.Manyscholarshadcarriedoutanin—depthstudyonth
6、epropertyofthegelledwaxycrudeoil,butthestudiesmainlyfocusedontheconstantlyrateofshear,andtherewasfewresearchonthecontinuousshear.Inthispaper,changerulesofthegelledwaxycrudeoilincontinuousshearingwerestudiedbycontrollingthecoolingrateandgelatinizationtemperatur
7、e.Theexperimentalresultsindicatethat,thehigherthecoolingrate,thesmallertheinitialviscosity,butafteraperiodofshearing,thecoolingratehaslittleeffectontheviscosity;thelowerthegelatinizationtemperature,thestrongertheinitialstructuralstrengthis,andtheviscosityishig
8、herunderthesameshearingrateafterthestructuraldamage,butthedifferenceisdecreasing;theviscosityincreaseswithdecreasingoftheshearingrateunderthecircumstanceoftheshearingratedecreasing
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