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时间:2020-03-26
《基于油藏实际的稠油层内水热催化裂解机理研究.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40卷第10期燃料化学学报Vo1.40NO.102012年1O月JournalofFuelChemistryandTechnologyoct.2012文章编号:0253-2409(2012)10.1206-06基于油藏实际的稠油层内水热催化裂解机理研究许洪星,蒲春生,吴飞鹏(中国石油大学(华东)石油工程学院,山东青岛摘要:开展了稠油层内水热催化裂解技术在胜利油田的先导实验,五口井平均周期单井增油653t,稠油初期降黏率达79.8%,措施l4周后降黏率仍大于62%。利用BrookfieldDV-Ⅲ黏度计、ElementarVar
2、ioEL111元素分析仪、KnauerK-700蒸气压渗透仪、Agilent6890N气相色谱仪和EQUINOX55傅里叶变换红外光谱仪等,对措施前后稠油的物化性质进行分析。结果表明,层内水热催化裂解后稠油黏度及平均分子量减小、轻烃含量增加、重质组分含量减少、氢碳原子比增加、杂原子含量减小。稠油层内裂解反应受催化剂体系、高温水及储层矿物因素控制,催化剂是促进稠油裂解的主要因素,供氢剂及分散剂等助剂有助于提高裂解效果,高温水的酸碱性质及储层矿物对稠油具有催化裂解作用。多因素协同作用下使稠油发生脱侧链、分子链异构、断链、加氢、开环、
3、成环、脱硫等系列反应,使得稠油大分子分解成小分子物质,降低了稠油黏度,改善了稠油品质,证实该技术在现场应用中具有可行性。关键词:稠油;水热催化裂解;催化剂;降黏;现场实验中图分类号:TE345文献标识码:AMechanismofundergroundheavyoilcatalyticaquathermolysisXUHong—xing,PUChun—sheng,WUFei-peng(SchoolofPetroleumEngineering,ChinaUniversityofPetroleum(EastChina),Qingdao
4、266555,China)Abstract:FieldtestsofundergroundheavyoilcatalyticaquathermolysiswerecarriedoutinShenglioilfield.theaverageperiodoilincrementfor5testwellsreachedto653t.andtheviscosityofheavyoilwasreducedbv79.8%.andstilldecreasedbymorethan62%after14weeks.Thechemicalandphy
5、sicalpropertiesofheavyoilbeforeandafterthereactionwereinvestigatedusingDV—IIIUltra.Brookfieldrheometers,ElementarVadoELIIIelementalanalyzer.KnauerK-700Vaporpermeabilitytester.Agilent6890NgaschromatographandEQUINOX55Fouriertransforminfraredspectrometer,etc.Theresultsi
6、ndicatethattheheavyoilviscosityandaveragemolecularweightaredecreasedandthecontentofresinandasphalteneisreducedafterthereaction.TheH/Cratioofheavyoilandthecontentofsaturateandaromaticareincreased.TheamountofheteroatominheavyoilisalSOdecreasedafterthetreatment.Thereact
7、ionofundergroundheavyoilcatalyticaquathermolysisismainlyaffectedbythecatalystsystem,hightemperaturewaterandreservoirminera1.inWhichthecatalystisthekeVcontrolfactor,andthehydrogendonatingacceleratoranddispersingagentCanimprovethecracking.Inaddition.theacid—basepropert
8、iesofwaterunderhightemperatureandthereservoirmineralcanpromotethereaction.Duringtheaquathermolysis,manyreactionsincludingtheremoval
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