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时间:2020-03-28
《交替注入聚合物驱渗流场变化规律及驱油效果.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、2014年8月大庆石油地质与开发Aug.,2014第33卷第4期PetroleumGeologyandOilfieldDevelopmentinDaqingV0l_33No.4DOI:10.3969/J.ISSN.1000—3754.2014.04.021交替注入聚合物驱渗流场变化规律及驱油效果韩培慧(大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712)摘要:为了进一步提高聚合物驱效率和提高采收率,降低聚合物用量,研究了交替注人聚合物驱。应用自动化岩心驱油装置,建立平面非均质油藏物理模型,在模型上布置饱和度测量电极和测压点,研究了单一段塞注入和交
2、替注入聚合物驱渗流场变化规律和驱油效果。结果表明:聚驱注入方式对低渗层渗流场变化影响显著,注聚过程中,单一段塞注人低渗层注入端和采出端压力差异大,主要消耗在注入井附近,交替注入压力梯度分布比较均匀;聚驱结束时,交替注入低渗层含油饱和度较单一段塞注入多降低12百分点;交替注入提高了聚合物驱效率,在降低聚合物用量25%前提下较单一段塞注入多提高采收率3.9百分点;大庆油田开展了4个交替注入聚合物驱矿场试验,节约聚合物用量26.4%,预计最终较单一段塞注人多提高采收率1.58百分点。关键词:聚合物驱;单一段塞注入;交替注入;含油饱和度场;压力场中图分类号:TE
3、357.46文献标识码:A文章编号:1000—3754(2014)04-0101-06SEEPAGEFIELDCHANGERULESANDoILDISPLACEDEFFECTSoFTHEALTERNATINGINJECTIONPoLYMERFLooDINGHANPeihui【ExplorationandDevelopmentResearchInstituteofDaqingOilfieldCompanyLtd.,Daqing163712,China)Abstract:Inordertofurtherincreaseoildisplacedeficienc
4、y,enhancetherecoveryfactorandreducethedosage,thealternatinginjectionpolymerfloodingisdeveloped.Thephysicalmodeloftheplanarheterogeneousreservoirsisestablished。onwhichthesaturationmeasuringelectrodesandpressuremeasuringpointsarearrangedwiththehelpofautomaticcore—displacingdevice,a
5、ndthentheseepagefieldchangerulesandoildisplacedeffectsofthesinglepolymerslugandalternatinginjectionarestudied.Theresultsshowthatthepolymerinjectionpatternssignificantlyaffectstheseepagefieldofthelow—permeability.Intheprocessofthepolymerinjection,thepressuresoftheinjec’tionandprod
6、uctionforthesinglesluginjectionchangegreatlyinthelow—permeabilitylayersandfurthermorethepressuresmainlyc0nsumeneartheinjectionwells.Meanwhile,thepressuregradientofthealternatinginjectiondis-tributesm0reuniform:attheendofthepolymerflooding,theoilsaturationofthealternatinginjection
7、is12%low—erthanthatofthesinglepolymersluginthelow—permeabilitylayer,thisachievementisduetotheincreaseofthepolymerfloodingefficiencv.ThereCOveryfactorofthealternatinginjectionis3.9%morethanthatofthesinglepolymerslugundertheconditionof25%polymerdosagesaved.Fourfieldtestsofthealtern
8、atinginjectionpolymerfloodingarecarriedo
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