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时间:2020-01-13
《分流河道砂体层内聚驱吸水剖面变化特征.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、2010年8月大庆石油地质与开发Aug.,2010第29卷第4期PetroleumGeologyandOilfieldDevelopmentinDaqingVo1.29NO.4DOI:10.3969/J.ISSN.1000-3754.2010.04.032分流河道砂体层内聚驱吸水剖面变化特征宋晓彬(大庆油田有限责任公司第一采油厂,黑龙江大庆163001)摘要:分流河道砂体发育是二类油层的主要沉积特征,以正韵律和复合韵律沉积为主,有少量的反韵律沉积,而主力油层以正韵律和多段多韵律为主,这反映了2类油层沉积环境的差异。以中新201站试验区连续吸水剖
2、面资料为依据,对不同沉积韵律油层注聚后吸水剖面变化特征进行了分析,注聚后河道砂层内注入剖面得到有效调整,厚油层顶部动用程度明显改善;各种韵律油层注聚过程中均不同程度出现剖面向底部转移阶段,底部油层吸水比例仍然较高;3种韵律油层剖面变化特征有一定差异,反韵律和复合韵律油层有利于提高注聚效果。厚油层层内调整效果与油层物性、渗透率级差、含水饱和度等地质因素有一定关系。关键词:分流河道;沉积韵律;聚驱;吸水剖面中图分类号:TE357.46文献标识码:B文章编号:1000-3754(2010)04-0145-04CHARACTERISTICSoFPoLY
3、MERFLooDEDINJECTIoNPROFILECHANGESINTHEINTERBEDSoFDISTRIBUTARYCHANNELSANDBoDIESSONGXiao—bin(No.1OilProductionCompanyofDaqingOilfieldCompanyLtd.,Daqing163001,China)Abstract:Well—developeddistributarychannelsandbodiesarethemainsedimentarycharacteristicsofsecond—typeoillayers,be
4、ingpositiveandcomplex-rhythmsedimentationsasmainforms,accompaniedwithasmallamountofinvertedrhythmsedimentation;onthecontrary,forthemainoilreservoirs,theprinciplerhythmsarepositiveandmultiplerhythms,whichrespondsthedifferentialoftwokindsofoilformationinsedimentaryenvironments
5、.BasedonthedataofcontinuousinjectionprofileinthepilotareaofNewNo.201StationinMiddleRegion,theanalysesofchangedcharacteristicsofpolymerfloodedinjectionprofilesareconductedfordifferentsedimentaryrhythmsoilres-ervoirsandfindoutthattheinjectionprofilesintheinterbedsofchannelsand
6、stonesareeffectivelyadjusted,thede—velopeddegreeatthetopofthickoillayersareobviouslyimproved;thestageforsectionstransferredtothebottomisemergedindifferentdegreesinthecourseOfallrhythmoil—layerpolymerflooding,theinjectionproportionatthebottomofoillayersisstillhigh;thereareace
7、rtaindifferentialinthechangedcharacteristicsofthreekindsofrhythmoillayerprofiles,theoillayerswithinvertedandcomplexrhythmsaregoodforenhancingpolymerfloodingeffects.Theadjustmenteffectsintheinterbedsofthickoillayershaveacertainrelationwiththegeologicalfactorsofphysicalpropert
8、ies,permeabilitydifferentialandwatersaturationetc.收稿日期:2009—12-02作者简介:宋晓彬,女
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