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1、東營凹陷北部陡坡帶深層砂礫巖體巖性測井識別毛慶1,張德峰1,吳春文2(1勝利石油管理局測井公司山東東營257096,2勝利油田西部新區(qū)研究中心山東東營257000)摘要:東營凹陷北部陡坡帶沙河街組深層砂礫巖體巖性識別難度大,鉆井取心、巖屑錄井和井壁取心不能滿足儲層評價的需求?;跍y井資料具有信息豐富、全井段采集的優(yōu)點,探討了利用巖心和巖心掃描圖像刻度地層微電阻率掃描成像(FMI)測井,建立了利用FMI精細(xì)劃分巖性和巖性組合的方法和模型;利用FMI劃分巖性的成果刻度常規(guī)測井資料,提取不同巖性的常規(guī)測井曲
2、線特征值,利用這些特征值探討了利用中子—密度交會和M-N值識別巖性的方法,結(jié)果表明,M和N值識別巖性效果較好,利用該方法識別的巖性與FMI識別的巖性具有較好的一致性,準(zhǔn)確率達(dá)到79.99%,可以滿足測井評價的需要,根據(jù)巖性劃分結(jié)果進(jìn)行了分巖性識別流體性質(zhì),提高了測井解釋符合率。關(guān)鍵詞:測井識別巖性;FMI;M-N值;深層砂礫巖;北部陡坡帶;東營凹陷LoggingrecognitionofglutiniteinthedeepnorthernsteepslopeofDongyingDepressionMa
3、oQing1),ZhangDe-feng1),WuChun-wen2)1)ShengliWellLoggingCompany,Dongying,Shandong257096;2)WesternNewAreaResearchCenterofShengliOilfieldCompany,Dongying,Shandong257000Abstract:ItisdifficulttorecognizeShahejieformationglutiniteinthedeepnorthernsteepslopeof
4、Dongyingdepression.Anddrillingcoring,loggingandsidewallcoringdebriscannotmeettheneedsofreservoirevaluation.Basedonloggingdatafull-holecapturetheadvantagesofusingcoreandcore-scalescannedimageformationFMIimaging(FMI)logging,establishedusingfinedivisionofF
5、MImethodoflithologyandlithologicalassociationandmodels;theuseoftheresultsofFMI-scaleconventionaldivisionoflithologiclogdata,extractionofdifferentlithologyloggingcurvesofconventionalvalues,thevalueoftheuseofthesefeaturesbyusingneutron-density,andtheMNfai
6、rvaluemethodoflithologyidentificationresultsthat,MandNvaluesidentifythelithologyeffectofbetteruseofthelithologyandFMIidentifiedbylithologyidentificationhasgoodconsistency,accuracyrateof79.99%tomeettheneedsoflogevaluation,accordingtolithologytheresultswe
7、resub-dividedintolithologicidentificationfluidnatureofthelogginginterpretationisconsistentwiththerateofincrease.Keywords:logginglithologyidentification;FMI;M-Nvalue;glutinite;thenorthernsteepbelt;Dongyingdepression東營凹陷北部陡坡帶沙河街組發(fā)育大量的砂礫巖體,該區(qū)砂礫巖體巖性復(fù)雜,不同巖性儲
8、層的物性、含油性和電性也存在較大差異,需要區(qū)分巖性進(jìn)行儲層物性和含油性評價[1-5]。識別巖性最直接的方法是依據(jù)巖屑錄井、鉆井取心和井壁取心等,但鉆井取心成本高,不可能每口井都進(jìn)行大量鉆井取心,不能滿足儲層評價的需求;而6測井資料具有信息豐富、全井段采集的優(yōu)點,如采用合適的技術(shù)手段識別巖性,可以很好地滿足勘探開發(fā)的要求。傳統(tǒng)的測井巖性識別技術(shù)主要基于交會圖技術(shù)和統(tǒng)計學(xué)理論[6-9],前者是利用2種或2種以上的測井?dāng)?shù)據(jù)進(jìn)行交會,基于巖性的理論值識別巖性,東