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ID:20446280
大小:1.90 MB
页数:73页
时间:2018-10-13
《塔中Ⅰ号气田井筒和集输管网缓蚀剂研究》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、摘要塔中Ⅰ号气田属塔里木油田即将大规模投入开发的亿吨级油当量气田,是“西气东输二线”的主力气源之一。塔中Ⅰ气田三井区(TZ62、TZ83、TZ82)均为高温高压井,井底流压高达60MPa,井底温度均在120℃以上。各井区普遍含H2S和CO2,腐蚀环境非常恶劣,针对塔中I号酸性气田CO2、H2S含量相对较高,地层水矿化度高、酸性强,对井筒及地面集输管网潜在腐蚀破坏性强的特点,以油酸和二乙烯三胺为原料,甲苯为携水剂的条件下,利用逐步升温脱水的方法合成咪唑啉,再加入硫脲,合成咪唑啉衍生物,最后通过氯化苄进行季铵化,得到咪唑啉衍生物季铵盐缓蚀剂MZ-3。各步反应反应物的摩尔比最终
2、确定为:油酸:二乙烯三胺:硫脲:氯化苄=1:1.4:1:1.2,环化反应温度为220℃、反应时间为4h。在CO2和H2S/CO2腐蚀环境下,90℃为三种型号管材(P110,P110S,TP110SS)腐蚀的敏感温度点,未添加缓蚀剂情况下,CO2腐蚀环境下,该温度点三种型号管材腐蚀速率为P110E3、-4,当YU-4缓蚀剂加量为500mg/L时,能有效控制塔中Ⅰ号气田井筒H2S/CO2腐蚀环境下的腐蚀(腐蚀速率<0.076mm/a);缓蚀剂MZ-3加量在200mg/L时能有效控制塔中Ⅰ号气田井筒地面管网H2S和CO2腐蚀。通过调研并结合塔中Ⅰ气田地面管线的实际情况,确定塔中Ⅰ气田井筒和地面管线的加药工艺。并对生产井进行现场缓蚀剂加药工艺研究及加药经济评价,找到了一种针对塔中Ⅰ号气田经济有效的防腐措施。关键词:酸性气田腐蚀,缓蚀剂,加药工艺,经济评价iResearchonCorrosionInhibitorofWellboreandGatheringPipelineNe4、tworkinTazhong-1GasFieldYanNing(Oil&GasEngineering)DirectedbyProf.PuChunshengAbstractTazhong-1gasfieldsbelongstoTarimoilfieldwhichiscomingintothedevelopmentoflarge-scalegasfields,anditistheoneofmaingassourceinLineTwoWest-EastGasPipeline.Tazhong-1gasfields(TZ62、TZ83、TZ82)wereHPHTwells,bott5、omholeflowingpressurewereupto60MPaandbottomholetemperaturewereabove120℃.Andthecorrosiveenvironmentwereverysevere,becauseevery-wellcontainedH2SandCO2.Inviewofthecharacteristicsofcorrosiondestructiveinwellboreandgatheringgatheringpipeline,becauseTazhong-1gasfieldsishighcontentofacidgasCO2an6、dH2S,formationwatersalinity,strongacidity.Theexperimentusedgradualwarmingofdehydrationsynthesizedimidazolinewhichutilizedoleicacidanddiethylenetriamineasrawmaterialsandtolueneascarryingagent.ThenaddedThioureatosynthetiseimidazolederivatives,andatlastwereceivedimidazolederivativeofquaterna7、ryinhibitorMZ-3throughbenzylchlorideconvertingquaternaryammonium.Thereactionineachstepthemolarratioofreactantsweredeterminedasfollows:Oleicacid:diethylenetriamine:thiourea:benzylchloridewere1:1.4:1:1.2;andthecyclizatedreactiontemperaturewas220℃,reactedtimewas4h.Inth
3、-4,当YU-4缓蚀剂加量为500mg/L时,能有效控制塔中Ⅰ号气田井筒H2S/CO2腐蚀环境下的腐蚀(腐蚀速率<0.076mm/a);缓蚀剂MZ-3加量在200mg/L时能有效控制塔中Ⅰ号气田井筒地面管网H2S和CO2腐蚀。通过调研并结合塔中Ⅰ气田地面管线的实际情况,确定塔中Ⅰ气田井筒和地面管线的加药工艺。并对生产井进行现场缓蚀剂加药工艺研究及加药经济评价,找到了一种针对塔中Ⅰ号气田经济有效的防腐措施。关键词:酸性气田腐蚀,缓蚀剂,加药工艺,经济评价iResearchonCorrosionInhibitorofWellboreandGatheringPipelineNe
4、tworkinTazhong-1GasFieldYanNing(Oil&GasEngineering)DirectedbyProf.PuChunshengAbstractTazhong-1gasfieldsbelongstoTarimoilfieldwhichiscomingintothedevelopmentoflarge-scalegasfields,anditistheoneofmaingassourceinLineTwoWest-EastGasPipeline.Tazhong-1gasfields(TZ62、TZ83、TZ82)wereHPHTwells,bott
5、omholeflowingpressurewereupto60MPaandbottomholetemperaturewereabove120℃.Andthecorrosiveenvironmentwereverysevere,becauseevery-wellcontainedH2SandCO2.Inviewofthecharacteristicsofcorrosiondestructiveinwellboreandgatheringgatheringpipeline,becauseTazhong-1gasfieldsishighcontentofacidgasCO2an
6、dH2S,formationwatersalinity,strongacidity.Theexperimentusedgradualwarmingofdehydrationsynthesizedimidazolinewhichutilizedoleicacidanddiethylenetriamineasrawmaterialsandtolueneascarryingagent.ThenaddedThioureatosynthetiseimidazolederivatives,andatlastwereceivedimidazolederivativeofquaterna
7、ryinhibitorMZ-3throughbenzylchlorideconvertingquaternaryammonium.Thereactionineachstepthemolarratioofreactantsweredeterminedasfollows:Oleicacid:diethylenetriamine:thiourea:benzylchloridewere1:1.4:1:1.2;andthecyclizatedreactiontemperaturewas220℃,reactedtimewas4h.Inth
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