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基于岩心及密井网的点坝构型与剩余油分析_闫百泉

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基于 岩心 密井网 构型 剩余 分析 闫百泉
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F²>Ð7?2014M10PETROLEUMEXPLORATIONANDDEVELOPMENTVol.41No.5597文章编号:1000-0747(2014)05-0597-08DOI:10.11698/PED.2014.05.12基于岩心及密井网的点坝构型与剩余油分析闫百泉1,2,张鑫磊1,于利民3,张东4,姜贵璞4,杨永杰5,孙雨1,2,韩小龙1,徐亚刚6(1.黑龙江省油气藏形成机理与资源评价重点实验室(东北石油大学);2.油气藏地质及开发工程国家重点实验室(西南石油大学);3.中国石油吉林油田分公司勘探开发研究院;4.大庆油田有限责任公司第四采油厂;5.中国石油集团测井有限公司长庆事业部;6.中国石油伊拉克公司)基金项目:国家自然科学基金(41172135);国家科技重大专项(2011ZX05010-001-004);中国博士后科学基金(2014M551213);西南石油大学国家重点实验室基金(PLN1305)摘要:基于大庆油田杏北地区葡3Ⅰ32单元密井网及直井与水平井岩心资料,参照现代沉积及古代露头模式,岩电结合求取侧积夹层构型参数,进而分析三角洲分流平原曲流型分流河道点坝侧积夹层三维构型特征及剩余油分布规律。研究结果表明,杏北地区葡3Ⅰ32单元点坝侧积夹层具有薄、缓、密的特点:夹层的厚度多为2~25cm;夹层上部和下部倾角较小,多在2°~5°,中部较陡,为7°~10°;平面分布密度达到0.11条/m。侧积夹层平面上呈新月形排列,剖面上呈叠瓦状、斜列式分布的三维空间结构特征。受侧积夹层构型特征及侧积体物性差异影响,点坝中下部水淹严重,剩余油主要分布在中上部。水平井水平段应设计在点坝中上部,可钻穿多个侧积体的中上部,增加供油单元,提高采收率。图13表1参19关键词:单砂体;点坝;薄夹层;侧积体;侧积夹层;构型;剩余油;密井网中图分类号:TE122.24;TE327文献标识码:APointbarconfigurationandresidualoilanalysisbasedoncoreanddensewellpatternYanBaiquan1,2,ZhangXinlei1,YuLimin3,ZhangDong4,JiangGuipu4,YangYongjie5,SunYu1,2,HanXiaolong1,XuYagang6(1.HeilongjiangOilandGasReservoirFormingMechanismandResourceEvaluationKeyLaboratory(NortheastPetroleumUniversity),Daqing163318,China;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation(SouthwestPetroleumUniversity),Chengdu610500,China;3.ExplorationandDevelopmentResearchInstitute,PetroChinaJilinOilfieldCompany,Songyuan138000,China;4.No.4OilProductionCompany,PetroChinaDaqingOilfieldCompanyLimited,Daqing163000,China;5.ChangqingBusinessDepartment,ChinaNationalPetroleumLoggingCo.Ltd,Xi’an710072,China;6.ChinaPetroleumIraqiCorporation,Beijing100011,China)Abstract:BasedonthedensewellpatternandthecoredataofstraightwellsandhorizontalwellsofPI332unitofPutaohuaoillayer,CretaceousYaojiaFormationinXingbeiareaofDaqingOilfield,accordingtothemodelofmodernsedimentsandancientoutcrop,theconfigurationparametersoflateralinterbedsconfigurationareacquiredbyrock-electricitycombination,whichareusedtoanalyzethethree-dimensionalconfigurationcharacteristicsofthepointbarlateralaccretioninterbedslocatedinthemeanderingdistributarychannelofthedeltadistributaryplainandtheresidualoildistribution.Theresultsshowthatthelateralaccretioninterbedsofpointbararethin,slow,anddenseinPI332unitofXingbeiarea.Thethicknessofinterbedsismainly2−25cm.Theupperandlowerdipangleofinterbedsissmallerat2°−5°.Themiddleofinterbedsissteeperat7°−10°.Theplanedistributiondensityis0.11/m.Thethree-dimensionalspatialconfigurationconsistsoftheplaneandprofilefeatures.Thelateralaccretioninterbedsareincrescentarrangementontheplane,andinimbricateandechelondistributionontheprofile.Undertheinfluenceoflateralaccretioninterbedsarchitectureandthephysicaldifferenceoflateralaccretions,themiddleandlowerpartsofpointbarsareseriouslyflooded,andtheresidualoilismainlydistributedinthemiddleandupperparts.Thehorizontalsectionofahorizontalwellshouldbedesignedinthemiddleandupperpartsofpointbars,anditshoulddrilloutthemiddleandupperpartsoflateralaccretionbodiestoincreasethesupplyunitandenhanceoilrecovery.Keywords:singlesandbody;pointbar;thininterbed;lateralaccretionbody;lateralaccretioninterbed;configuration;residualoil;densewellpattern0„ýÛ"²B7?¥‚'Ɔé8=CªbWsƒ+˜˜yý²+˜†é8=d(ÉŸa1@+˜[#:Ų™îÐsƒ¥eÅT¨Ÿsž×j[1-10]b+Y^ÉÆÚi+Úc£ªù¥º²B¨²ª=†²ØœXî¹Åÿƒtº²B×ÁÁaLC‡žil¥“º²B=Q7?”¥×1598F²>Ð7?c²B7?Vol.41No.5/Œ1obw@ÄÞ^¨²ª¥ö8=†CªÁa?asƒT©˜¥E@K@T¨°¤eÅ=†¥:Ųsƒ[11-14]^"-º²B+Y^vi²B‹.¥×1þ1/Œ­BbsS=“%"ª˜ùîZë¥ÓDV©¹/†é8=†Cª˜ùîXî¹%"ªæÐ×ÄùîZ_­B[8,15-19]bÄÞ˜ùîŒy'~¶ñ¥KÅCª¥Ë˜aîya?âsƒ+˜©ZëŒC°¤£b'Ó[vi²B¨²ª²Øœ×Äuvž¹uâ¡"-EFî$½²ªîⅠ332æ†í¹è¿£Ü|Ý#°Ýû'aáÝ©©Ý'£Uw@ÄÞ˜bW+˜#:Ųsƒ?pb1†é8bWsƒ+˜ž¹uÊ¿vi²BžŽÕ/¥†B²u/1ÜÏb²ª2Ú®aÚꮆMÄ÷2†ÜÏbîⅠ33æHù¹¾©¹â¡@Kv£|ù­ªïv?3£ÉT¨ÀîⅠ1æHù¾¹uÉÆ'µiö'µæÌâbîⅠ332æHùž¹u¹Ø˜Ýs@ÜðÌâw@˜s@Š¡?âæ+˜vi²Bµ}VŸbYVÊ|S½ªaSªa•vªiªÊSÝyëùîu"¥ªÚsOqª½¹ªìON$É›®vžlï)>†¥ÜëÝ©1bûÈ1$yë©ÝMTïÝïªÉ›±MMYaÜë±MF†KªûžæHW†íÜë±Mm[19]nm1bYVîⅠFòæHW†í¥Ú%³é?Cî3Ⅰ32†í±M˘µs@Š¡alŠ¡#nÁéÏ£ÜÝulŠ¡w@̶¥s@Š¡é8¹§_Fî¥ÄÞæ8=†Cª¥˜+˜7?VñÏ¥ÿÆ@8µ×1¥eÅT¨^ÄÞ%"ª=:Ų™îÐsƒ¥öeyÍb§Cª:Ų™î¥eÅT¨X$M1¥þLî£L[12,19]î[Ú%³éÄÞ=Cª¥˜+˜s:Ųsƒ+˜É7|M‹¥‹.ZE#ZTµ×1ilb图1葡Ⅰ332单元测井相模式及沉积微相SPi1–ÈÊRMN—±ÈÊÈEqRML—±0ÈEq2ÄÞ˜sÄÞ˜^·w@ÄÞ=†¸ë©)a˜1ÍaûM˘#bWßF"T[1-6]b¸ë“1~4)¸ëÏ»4)¸ë¹§Cªë^"-MY¥×Ę1Íö1¹§8#§Cª+˜V¨áÝ©'MYûMö1¹ÄÞ=ûŸaìaæ/#þä©bWßF"T^·§Cª§8bW™ÿ#†ZTb'Óö1ùî§Cª˜1Í+˜'樧Cª`˜a`_a?aÜësƒá#bWßF"TV˜§CªØ»sƒ[19]b2014M10†ä©¿û#áÝ©¥ÄÞ˜Ð:Ųs5992.1侧积夹层界面倾角特征¸ë`˜¥smµÕö1“ûCª`˜sEalŠ¡ä†‹¾ŽësEalÝÝóîsE[5-6,8,19]b'Ӑ¨lÝBî‚ÑV50mûCª`˜sZEi²†}]h#C}æî£U¥§Cª`˜+˜¾ÄÞ=Cª¥`˜É›8†sb2.1.1小井距确定构型界面倾角ÄÞui3lÝÝÄÝÄ"¥ªõLÍ¿Ü›§Z_byÄÝlKµV?GÛ]B§8y7V[’çM‹Cª`˜by§Cª‚]†Ê`˜‚]‚V?û9ØŸî[YȨÜ(`˜V˜¾Cª¥`˜b8ØEÂ/’ÝGÛ]B§Cªnm2Hô§Z_Ý1GÛ¥‹¹Cª¥¸†Ý2GÛ¥¹†]BCªÝW¥Úµ¹hݹL5¾CªÜ(`˜图2小井距井求取侧积夹层倾角示意图α¹arctanh/LV79ؾCª¥Ü(`˜b®m3J1iJ2Ý33.2mÝéûäëÚµ¹5.4m9Ø`˜¹9°14′J3iJ4Ý25.2mÝéûäëÚµ¹3.4m9Ø`˜¹7°41′J5iJ6Ý32.3mÝéûäëÚµ¹5.5m9Ø`˜¹9°39′b3lÝÝîp¤¥§Cª`˜ÐC}æ#}]hî£U¥§Cª`˜Ü(10°P·¹¤ÍNw]B§8$M‹¥Ý]HGÛ[5]b图3小井距侧积夹层构型分析2.1.2直井岩心求取侧积夹层倾角ÄÞ=éû§Cª¥`˜Vô§CªÐ||ž¥'µiö'µM£ÜªØÀäCûW¥C˜p|ƒ"V?E¹ª`|#Ý|¥•YbyGƥȘžµ‚ç|'´ë­¹j`˜bùîuJ3ݹ|ÝÜV¾ÝîⅠ332†íû4³#©ÝwLBÊ"¥ªCª¥j`˜É›9زTnm4Vüa/†Cª①a⑤a⑥图4直井岩心侧积夹层特征600F²>Ð7?c²B7?Vol.41No.5`˜¹2°~5°aφCª②i④`˜¹7°~10°P·†Cª¨5~25cmbûŸ¹CûÀxéÉCû¥V˘îy¹‚Wuù‹¾™îb2.1.3水平井岩心提取侧积夹层倾角JP1ݹùîu¥£Ü|Ýnm5¾Ý£Ü|352m†£ÜADGÛ"¥ª¥ä†GÛ14Cû#xéÉCû§Cªb®¿GÝVñÏ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com联系作者:孙雨(1981-),男,辽宁海城人,
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