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1、第46卷第2期Jou浙rnalof江Zhejia大ngUn學(xué)iversit學(xué)y(En報ginee(r工ing學(xué)S版cie)nce)V01.46NO.22Ol2年2月Feb.2O12D()I:10.3785/j.issn.1008973X.2012.02.030含泥質(zhì)碳酸鹽巖儲層反演技術(shù)劉金連~,石戰(zhàn)結(jié)。,李晨曦(1.浙江大學(xué)地球科學(xué)系,浙江杭州310027;2.中國石化油田事業(yè)部,北京100728;3.浙江大學(xué)文化遺產(chǎn)研究院,浙江杭州310058;4.中國石油大學(xué)地球科學(xué)學(xué)院,北京1022,t9)摘要
2、:為了提高含泥質(zhì)碳酸鹽巖儲層反演的精度,提出以波阻抗數(shù)據(jù)體作為背景約束進(jìn)行基質(zhì)孔隙度隨機(jī)反演處理的方法.該方法首先統(tǒng)計分析大量測井資料,獲得波阻抗和基質(zhì)孔隙度的關(guān)系;然后以波阻抗反演數(shù)據(jù)體作為背景約束,對基質(zhì)孔隙度進(jìn)行隨機(jī)反演處理;最后根據(jù)基質(zhì)孔隙度與波阻抗數(shù)據(jù)交會設(shè)定門檻值來劃分儲層與非儲層.研究結(jié)果表明,儲層和非儲層對應(yīng)的基質(zhì)孔隙度數(shù)值存在明顯界限,最終反演的基質(zhì)孔隙度數(shù)據(jù)體清晰顯示了儲層和非儲層的分布情況.與儲層的實際厚度相比,利用該方法反演的儲層厚度誤差在10以.關(guān)鍵詞:碳酸鹽巖;含泥質(zhì)儲層反
3、演;隨機(jī)反演;基質(zhì)孔隙度中圖分類號:P631文獻(xiàn)標(biāo)志碼:A文章編號:1008—973X(2012)02—372—05Inversetechnologyofclay—bearingcarbonatereservoirIIUJin—lian,SHIZhan—jie。,LIChen—xi(1.DepartmentorGeosciences,zhejiangUniversity,Hangzhou310027,China;2.Oilfiegddivision('jChinaPetro~hemicalCorpor
4、ation,Beijing100728,China;3.Resear(hInstituteofculturalheritage,ZhejiangUniversityHangzhou310058,China;4.CollegeofGeoscien~es,ChinaUniversityol『Petroleum,Beijing102249,China)Abstract:Inordertoincreaseinversionaccuracyofclay—bearingcarbonatereservoir,int
5、hispaper,weproposethematrixporosityrandominversionprocessingmethodinwhichmatrixporosityisconstrainedbywaveimpedanceinversiondatabase.Firstly,therelationshipbetweenwaveimpedanceandmatrixporositywasacquiredbasedonalotofstatisticalanalysisofwell—logdata.Se
6、condly,matrixporosityrandominversionprocessingwasfinishedbyusingwaveimpedanceinversiondatabaseasconstrainedbackground.Finally,reservoirandnon—reservoirweredividedbysettingthresholdaccordingtocrossesbetweenmatrixporosityandwaveimpedancedata.Theresultssho
7、wthatthereisaclearboundaryforthematrixporosityvaluebetweenreservoirandnon—reservoir.Thereservoirandnon—reservoircanbeidentifiedclearlyfromthefinalmatrixporosityinversionprofile.Theresultsalsoshowthattheerrorisiessthan10contrastinginversionreservoirthick
8、nessbythisinversemethodwithdrillingthickness.Keywords:carbonate;clay—bearingreservoirinversion;randominversion;matrixporosity碳酸鹽巖儲層在我國分布面積廣、厚度大,具有用測井約束反演技術(shù)識別儲層的精度受到限制.因良好的勘探前景和巨大潛力,是我國油氣資源戰(zhàn)略此,消除儲層中泥質(zhì)的影響成為該類儲層反演的關(guān)接替的重要領(lǐng)域.但是,當(dāng)儲層中泥質(zhì)