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1、石油勘探與開發(fā)7002011年12月PETR0LEUMEXPL0RATIoNANDDEVEL0PMENTVO1.38NO.6文章編號(hào):1000—0747(2011)06—0700—08大慶長垣以東地區(qū)扶余油層油氣運(yùn)移與富集孫同文,呂延防,劉宗堡,付曉飛,付廣(東北石油大學(xué)油氣藏形成機(jī)理與資源評(píng)價(jià)黑龍江省重點(diǎn)實(shí)驗(yàn)室)基金項(xiàng)目:國家大型油氣田及煤層氣開發(fā)科技重大專項(xiàng)“中國大型氣田形成條件、富集規(guī)律及目標(biāo)評(píng)價(jià)”(2008ZX05007)高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金項(xiàng)目(2006220002)摘要:為了系統(tǒng)查明大慶長垣以東地區(qū)扶余油層油氣運(yùn)聚過程和富集特征,詳細(xì)研究其油氣運(yùn)移條件,并通過油田開發(fā)
2、動(dòng)態(tài)數(shù)據(jù)驗(yàn)證,總結(jié)油氣富集的主要特征。大慶長垣以東地區(qū)具有垂向一側(cè)向雙重油氣運(yùn)移方式,垂向運(yùn)移主要發(fā)生在上覆烴源巖垂向排烴范圍內(nèi),油氣在超壓作用下,沿開啟的T2油源斷層“倒灌”進(jìn)入下伏扶余油層;側(cè)向運(yùn)移主要有3種類型:源內(nèi)沿砂體向油源斷層上升盤短距離側(cè)向運(yùn)移;近源沿構(gòu)造軸向向繼承性局部隆起帶短距離側(cè)向運(yùn)移;遠(yuǎn)源沿砂體溝通的II類斷裂密集帶向朝陽溝階地長距離側(cè)向運(yùn)移。油源斷層發(fā)育部位和烴源巖垂向排烴范圍附近、構(gòu)造軸向與斷層走向近一致的鼻狀構(gòu)造為富油區(qū)帶;因特征不同,斷裂密集帶在三肇凹陷不是主要富油部位,而在朝陽溝階地為有利儲(chǔ)油構(gòu)造。圖8表3參21關(guān)鍵詞:扶余油層;油氣運(yùn)移;油氣富集特征;斷裂
3、密集帶;大慶長垣以東地區(qū)中圖分類號(hào):TEl22.1文獻(xiàn)標(biāo)識(shí)碼:AHydrocarbonmigrationandenrichmentfeaturesoftheFuyuoillayertotheeastoftheDaqingplacanticlineSunTongwen,LfiYanfang,LiuZongbao,F(xiàn)uXiaofei,F(xiàn)uGuang(KeyLaboratoryofReservoirFormationMechanismandResourceEvaluationofHeilongfiangProvince,NortheastPetroleumUniversity,Daqing163
4、318,China)Abstract:Toclarifythehydrocarbonmigration,accumulationandenrichmentfeaturesoftheFuyuoillayertotheeastoftheDaqingplacanticline,thehydrocarbonmigrationconditionsoftheFuyuoillayerarestudiedindetailsusingtheperformancedataofoilfields.IntheareatotheeastoftheDaqingplacanticline,dualmodesofvert
5、ical-lateralmigrationareavailable.Verticalmigrationmainlyhappenswhereverticalhydrocarbonexpulsiontakesplaceinuppersourcerocks.HydrocarbonispouredintotheunderlyingFuyuoillayeralongtheopenT2sourcefaultunderoverpressure.Lateralmigrationhasthreetypes:hydrocarbonwithinsourcerocksmigrateslaterallyinshor
6、tdistanceintotheupliftedwallofsourcefaultsalongsands;hydrocarbonnearsourcerocksmigrateslaterallyintosuccessivelocalupliftsalongtectonicaxisinshortdistance;hydrocarbonfarfromsourcerocksmigrateslaterallyinlongdistanceintotheChaoyanggouTerracealongTypeIIfaultconcentrationbeltsconnectedbysands.Oil—ric
7、hzonesareplaceswheresourcefaultsaredevelopedandnose—structuresaroundverticalhydrocarbonexpulsionofsourcerockswhosetectonicaxisisnearlythesamewiththetrendoffaults.Becauseofthedifferentfeatures,thefaultconcentratio