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ID:48009117
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页数:4页
时间:2020-01-13
《X油藏注气混相驱可行性实验研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、石油与天然气化工第46卷第4期CHEMICALENGINEERINGOFOIL&GAS63X油藏注气混相驱可行性实验研究12311李轶超姚先荣王长权代宸宇杨琳琳1.中国石油大学(北京)2.中国石油川庆钻探工程公司3.长江大学摘要针对X底水油藏油井注水后综合含水上升过快的问题,利用HB70/300型高压物性分析仪开展了该区块原油相态特征实验、注气相态特征实验,并运用细管法开展了注CO2最小混相压力实验。对比分析了CO2和N2两种性质气体注入前后原油的相态特征变化,确定了该区块原油注CO2最小混相压力,为X油藏注气
2、提高采收率可行性提出依据。实验结果表明,X油藏原始地层压力为46.01MPa,原油饱和压力为11.06MPa,注N2后饱和压力上升迅速,在原始地层条件下难以实现混相,表现出典型的非混相特征;注CO2后饱和压力上升较平缓,细管法测得的最小混相压力为28.03MPa,说明利用CO2可实现CO2的混相驱替,而且最终的驱替效果比较理想。说明该油藏可开展注CO2混相驱,为进一步的开发方案调整提供了依据和合理的建议。关键词N2CO2饱和压力混相驱替中图分类号:TE357.45文献标志码:ADOI:10.3969/j.iss
3、n.1007‐3426.2017.04.012FeasibilityexperimentalresearchonmisciblefloodingofXreservoirbygasinjection12311LiYichao,YaoXianrong,WangChangquan,DaiChenyu,YangLinlin1.ChineseUniversityofPetroleum,Beijing,China;2.CNPCChuanqingDrillingandExplorationEngineeringCompany
4、Ltd,Chengdu,Sichuan,China;3.YangtzeUniversity,Jingzhou,Hubei,ChinaAbstract:InordertosolvetheproblemthatthecomprehensivewatercutisrisingtoofastafterwaterinjectioninXreservoir,theresearchhasbeencarriedoutinthispaper.Experimentsonphasebehaviorofcrudeoilandphase
5、behaviorexperimentsofgasinjectionhavebeencarriedoutbyusingHB70/300highpressurephysicalpropertiesanalyzer.TheminimummiscibilitypressureofCO2injectionhasbeencarriedoutbyusingthintubemethod.ThephasebehaviorofcrudeoilhasbeenanalyzedbeforeandafterN2orCO2injection
6、.Inthispaper,theminimummisciblepressureofcrudeoilforCO2injectionisdetermined,whichprovidesbasisforEORofXreservoir.TheseexperimentsshowedthattheoriginalpressureofXreservoiris46.01MPa,thesaturationpressureofcrudeoilis11.06MPa,whichcanhardlygetmisciblefloodingb
7、yN2injectionbecausethesaturationpressurewillrisequickly.ThesaturationpressurewillrisegentlyforCO2.Theminimummiscibilitypressuremeasuredbythethintubemethodis28.03MPa,indicatingthatmisciblefloodingbyCO2injectioncanbeachieved.Andtheultimatedisplacementeffectisi
8、deal.ThereservoircanbeinjectedwithCO2miscibleflooding,whichprovideabasisandreasonablesuggestionsforadjustingdevelopmentplan.Keywords:nitrogen,carbondioxide,saturationpressure,miscibleflooding基金项
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