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1、高含水期油田水驅(qū)特征曲線關(guān)系式的理論推導(dǎo)_宋兆杰2013年4月石油勘探與開(kāi)發(fā)PETROLEUMEXPLORATIONANDDEVELOPMENTVol.40No.2201文章編號(hào)：1000-0747(2013)02-0201-08DOI:10.11698/PED.2013.02.09高含水期油田水驅(qū)特征曲線關(guān)系式的理論推導(dǎo)宋兆杰1，李治平1，賴(lài)楓鵬1，劉剛2，甘火華3（1.中國(guó)地質(zhì)大學(xué)（北京）能源學(xué)院；2.延長(zhǎng)石油集團(tuán)研究院；3.中國(guó)石油天然氣勘探開(kāi)發(fā)公司）基金項(xiàng)目：國(guó)家自然科學(xué)基金（51174178）；國(guó)家科技重大專(zhuān)項(xiàng)
2、（2011ZX05016-006）；中央高校基本科研業(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金資助（2-9-2011-206）摘要：傳統(tǒng)水驅(qū)特征曲線推導(dǎo)的理論基礎(chǔ)是中含水階段油水相對(duì)滲透率比（Kro/Krw）與含水飽和度（Sw）成半對(duì)數(shù)直線關(guān)系，而在高含水階段Kro/Krw與Sw在半對(duì)數(shù)坐標(biāo)中明顯偏離直線關(guān)系，水驅(qū)特征曲線普遍存在上翹現(xiàn)象。為了準(zhǔn)確預(yù)測(cè)油田開(kāi)發(fā)后期開(kāi)發(fā)動(dòng)態(tài)和可采儲(chǔ)量，對(duì)實(shí)際巖心相對(duì)滲透率曲線進(jìn)行平均化處理，并借鑒文獻(xiàn)中巖心數(shù)據(jù)資料，擬合出適合高含水階段Kro/Krw與Sw關(guān)系的新型表達(dá)式；應(yīng)用Buckley-Leverett前沿推進(jìn)
3、方程和Welge平均含水飽和度方程，推導(dǎo)出適合高含水期油田的新型水驅(qū)特征曲線關(guān)系式。應(yīng)用分析表明，新方法預(yù)測(cè)水驅(qū)可采程度與產(chǎn)量遞減方法計(jì)算結(jié)果吻合度較好，對(duì)于油田生產(chǎn)后期開(kāi)發(fā)指標(biāo)預(yù)測(cè)具有一定的實(shí)用性。圖8表8—————————————————————————————————————————————————————參22關(guān)鍵詞：水驅(qū)特征曲線；高含水；相對(duì)滲透率；含水飽和度；產(chǎn)量遞減；可采儲(chǔ)量中圖分類(lèi)號(hào)：TE341文獻(xiàn)標(biāo)識(shí)碼：ADerivationofwaterfloodingcharacteristiccurveforhi
4、ghwater-cutoilfieldsSongZhaojie1,LiZhiping1,LaiFengpeng1,LiuGang2,GanHuohua3(1.SchoolofEnergyResources,ChinaUniversityofGeosciences,Beijing100083,China;2.ResearchInstituteofYanchangPetroleum(Group)Co.Ltd,Xi’an710054,China;3.ChinaNationalOil-GasExploration&Dev
5、elopmentCorporation,Beijing100034,China)Abstract:Thelinearrelationshipbetweenrelativepermeabilityratio(Kro/Krw)andwatersaturation(Sw)onthesemi-logcoordinateinthestageofmiddlewater-cutisthetheoreticalbasisforthederivationoftraditionalwaterfloodingcharacteristiccur
6、ve.However,therelationshipofKro/KrwversusSwdeviatesfromthestraightlineinthehighwater-cutstage,whichresultsintheupwarpingofwaterfloodingcharacteristiccurve.Inordertoaccuratelypredicttheproductionperformanceandrecoverablereservesinthelatedevelopmentstage,therelativ
7、epermeabilitycurvesofactualcoreswereaveraged.—————————————————————————————————————————————————————Furthermore,usingthecoredatainthereference,anewexpressionofKro/KrwversusSwwasobtainedbyregressionforthehighwater-cutstage.Onthebasisofthefrontal-driveequationandthea
8、veragewatersaturationequationproposedrespectivelybyBuckley-LeverettandWelge,anewwaterfloodingcharacteristiccurvewasderivedwhichismoreapplicableforhighwater-cut
