欢迎来到天天文库
浏览记录
ID:52219498
大小:305.42 KB
页数:5页
时间:2020-03-25
《氮气泡沫调驱技术及其矿场应用.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、2013年6月大庆石油地质与开发June,2013第32卷第3期PetroleumGeologyandOilfieldDevelopmentinDaqingVol_32No.3DOI:10.3969/J.ISSN.1000—3754.2013.03.020氮气泡沫调驱技术及其矿场应用赵利昌张云宝(中海油田服务股份有限公司油田生产研究院,天津300450)摘要:渤海油田储层非均质、原油黏度大,强注强采引起注入水层内绕流和层间窜流,水驱开发效果较差。采用室内实验和物理模拟方法研究了氮气泡沫调驱工艺技术,根据泡沫半衰期、阻力系数和采收率等指标优选出氮气泡沫体系并确定了注入方案,水驱阶段采收率
2、分别为27.7%,26.8%和28.3%,相比水驱泡沫连续注入、2个段塞注入、3个段塞注入分别提高19.7%,23.5%和31.7%;泡沫采取小段塞分段注入效果更好。矿场应用表明:泡沫连续注人井组平均含水率下降5%,累计增油量1.86×10m。,有效期12个月;而泡沫分段塞间隔注入井组平均含水率下降7.6%,累计增油量3.58×10m3,有效期l9个月。泡沫分段塞间隔注入好于连续注入,可有效解决气窜和吸液剖面反转问题,为改善水驱开发效果提供了新途径。关键词:氮气泡沫;配方优选;调驱性能;实验评价;矿场试验中图分类号:TE357.7文献标识码:A文章编号:1000-3754(2013)0
3、3-0097-05ADJUSTABLEDRIVINGTECHNIQUEBYNITRoGENFoAMANDITSFIELDAPPLICATIoNZHAOLichang,ZHANGYunbao(ResearchInstituteof胁OilProductionofCNOOCOilfieldServicesCompanyLtd.,Tianjin300450,China)Abstract:DuetothereservoirheterogeneityandratherseriousoilviscosityofBohaiOilfield,thestrongwaterin—iectionandoil
4、productionresultintheflowaroundinterlayerandthecrossnOWamolagthereservoirs,intheendthewaterfloodeddevelopmenteffectsarerather15oorer.Withthehelpofproblemindoorexperimentandphysicalsimu-lationmethod。theadjustabledrivingtechnologyofnitrogenfoamisstudied.Accordingtotheindexesoffoamhalf-life,resista
5、ncecoeficientandrecoveryandSOon,theabovetechnicalsystemisoptimizedandtheinjectionpro-gramisdetermined.Comparingwiththecontinuousinjectionoffoaminwaterflooding,two-slugandthree-slugin-jections,thewater—floodedstagerecoveryare27.7%,26.8%and28.3%respectively,increasedby19.7%,23.5%and31.7%respective
6、ly。theeffectsofsmallslugstep—by—stepinjectionaremorefavorite.Thefieldappli—cationSHOWSthattheaveragewatercutdrops5%forthewellgroupofcontinuousfoaminjection。theaccumulatedincrementaloilisupto1.86X10m,andthevalidperiodreaches12months;whilethecorrespondingwatercutforthewellgroupofintervalpluginject
7、iondecreasesby7.6%,thetotalincreasedoilis3.58×10m,lastingf0r19months.Thelatterinjectingmodeisbetterthantheformer:theproblemofthegascrossandliquid—absorbingcrosssectioninversioncanbeeffectivelysolved,thusthenewapproachofimpro
此文档下载收益归作者所有