資源描述:
《冀中坳陷隱蔽型潛山油藏類型與成藏模擬.pdf》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、石油勘探與開發(fā)2012年4月PETR0LEUMEXPLORATIONANDDEVELoPMENTV_01.39No.2137文章編號:1000-0747(2012)02.013707冀中坳陷隱蔽型潛山油藏類型與成藏模擬趙賢正,金鳳鳴,崔周旗,韓春元,曾濺輝2,王權(quán),郭凱2(1.中國石油華北油田公司;2.中國石油大學(xué)(北京))基金項目:國家科技重大專項(2011ZX05006.005);中國石油天然氣股份有限公司科技項目(2011D0703)摘要:基于近年來冀中坳陷隱蔽型潛山油藏勘探進(jìn)展,分析隱蔽型潛山油藏的類型和成藏特點,并通過油氣運聚模擬實驗剖析隱蔽型潛山油藏的油氣運聚
2、機制。潛山油藏可分為容易發(fā)現(xiàn)的潛山頂(頭)聚油的常規(guī)型潛山油藏和不易發(fā)現(xiàn)的潛山坡及潛山內(nèi)幕聚油的隱蔽型潛山油藏。有效隔(蓋)層的存在是潛山內(nèi)幕油藏形成的重要條件,控山斷層是其最主要的油氣運移通道;潛山坡油藏圈閉的形成需2個遮蓋條件,即頂部由不整面之上的泥質(zhì)蓋層遮擋,側(cè)面由潛山內(nèi)幕隔層形成封堵,不整合面是其主要油氣運移通道。二維油氣運聚模擬實驗表明,輸導(dǎo)通道(斷層或不整合面)與潛山儲集層滲透率的比值及充注動力決定潛山油氣的優(yōu)先充注部位,當(dāng)斷層或不整合面為高效輸導(dǎo)層時,油氣優(yōu)先充注潛山頂部,形成潛山頂(頭)油藏;當(dāng)斷層或不整合面的滲透性變差或其本身具非均質(zhì)性,而潛山內(nèi)幕或潛山
3、坡又存在高滲透性儲集層時,則油氣優(yōu)先向潛山內(nèi)幕或潛山坡充注,形成潛山內(nèi)幕或潛山坡油藏。圖7表2參20關(guān)鍵詞:冀中坳陷;隱蔽型潛山油藏;聚油機理;成藏模擬中圖分類號:TEl22.1文獻(xiàn)標(biāo)識碼:ATypesofsubtleburied.hilloilreservoirsandtheiraccumulationsimulationinJizhongDepression,BohaiBayBasinZhaoXianzheng,JinFengming,CuiZhouqi,HanChunyuan,ZengJianhui,WangQuan,GuoKai(1.PetroChinaHuabe
4、iOilfieldCompany,Renqiu062552,China;2.ChinaUniversityofPetroleum,Beijing102249,China)Abstract:Thetypesofsubtleburied-hillresevoirsandtheiraccumulationcharacteristicsareanalyzedbasedontheexplorationprogressionofsubtleburied-hillreservoirsintheJizhongDepressioninrecentyears.Thesereservoirsa
5、reclassifiedintoeasilydiscoveredburied-hillheadreservoirs.a(chǎn)nddifficultlydiscoveredburied-hillslopereservoirsandburied-hillinternalreservoirs.Effectivesealisthekeyfactorfortheformationofbuffed-hillinternalreservoirs,andmountaincontrollingfaultsaretheimportanthydrocarbonmigrationpathways.As
6、forbuffed—hillslopereservoirs,twosealingconditionsmustbesatisfied,includingtheargillaceouscaprocksatthetopoftheunconformitiesandtheburied-hillinternalbarriersattheflank,andtheunconformitiesactastheprimarymigrationpathways.Simulationexperimentsonpetroleummigrationandaccumulationbya2Dexperi
7、mentalmodelshowthatthepreferentialcharginglocationofhydrocarbonisdeterminedbythechargingforceandthepermeabilityratiooftransportpathways(faultsorunconformities)tobuffed-hillreservoirs.Whenfaultsorunconformitiesarehigh-efficiemtransportpathways,hydrocarbonwillchargeth