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1、第35卷第4期世界地質(zhì)Vol.35No.42016年12月GLOBALGEOLOGYDec.2016文章編號(hào):1004—5589(2016)04—1052—06南蘇門達(dá)臘盆地油氣地質(zhì)特征與勘探潛力分析1112盧小新,任懷建,周國文,劉厚武1.中化石油勘探開發(fā)有限公司,北京100031;2.長城鉆探工程公司,北京100101摘要:以廣泛收集的數(shù)據(jù)資料為依據(jù),運(yùn)用含油氣盆地理論方法,總結(jié)南蘇門達(dá)臘盆地構(gòu)造沉積演化和油氣地質(zhì)特征,探討油氣分布規(guī)律,分析其勘探潛力。結(jié)果顯示,南蘇門達(dá)臘盆地是新生代弧后裂谷盆地,經(jīng)歷了裂前、裂谷、過渡、坳陷和反轉(zhuǎn)等5個(gè)演化階段。主力烴源巖為過渡期
2、沉積的炭質(zhì)頁巖和煤層,儲(chǔ)集層主要為上漸新統(tǒng)砂巖、下中新統(tǒng)灰?guī)r和裂縫基底。油氣總體呈現(xiàn)“深層氣、中層油和氣、淺層油”的分布特征,主要富集于構(gòu)造及構(gòu)造復(fù)合相關(guān)圈閉中。斷裂、儲(chǔ)層發(fā)育有利相帶和凹中隆是控制油氣分布的主要因素。盆地油氣成藏條件良好,具有較好的勘探潛力。生烴灶周邊斷裂發(fā)育的斜坡、古隆起是有利的勘探區(qū),凹陷內(nèi)的巖性、地層圈閉也是有利的勘探目標(biāo),應(yīng)加大對(duì)此類圈閉的研究和勘探力度。關(guān)鍵詞:南蘇門達(dá)臘盆地;油氣地質(zhì);油氣分布;勘探潛力中圖分類號(hào):P618.130.2文獻(xiàn)標(biāo)識(shí)碼:Adoi:10.3969/j.issn.1004-5589.2016.04.015Petrole
3、umgeologyfeaturesandexplorationpotentialanalysisofSouthSumatraBasin1112LUXiao-xin,RENHuai-jian,ZHOUGuo-wen,LIUHou-wu1.SinochemPetroleumExplorationandProductionCo.,Ltd.,Beijing100031,China;2.CNPCGreatWallDrillingCompanyLtd.,Beijing100101,ChinaAbstract:Basedonthedatacollectedfromvarioussou
4、rcesandapplyingthetheoriesandmethodsofbasinanalysis,thispapersummarizesthetectonic-sedimentationevolutionandpetroleumgeologycharacteristicsofSouthSumatraBasin,discussestheoilandgasdistributionpatternsandanalyzesitshydrocarbonexplorationpotential.TheresultsshowthattheSouthSumatraBasinisaC
5、enozoicback-arcriftbasin,experiencing5stagesinevolution,includingpre-rifting,rifting,transition,sagandcompression.Theprincipalsourcerockofthebasiniscarbona-ceousshaleandcoaldepositingduringthetransitionstage.ThemainreservoirsarefoundinupperOligocenesand-stones,lowerMiocenecarbonatesandpr
6、e-Paleogenecrackbasement.Generally,thehydrocarbondistributionischaracterizedbypatternsofgasinthedeeperreservoirs,oilandgasinthemiddlereservoirs,andoilintheshallo-werreservoirs.Oilandgasareenrichedinthestructuraltrapsandstructuralcombinationtraps.Faults,favorablesedimentaryfaciesofreservo
7、irsandpaleo-highsaretheprincipalfactorscontrollingtheoilandgasdistribution.TheSouthSumatraBasinhasgoodhydrocarbonaccumulationconditionsandfavorableexplorationpotential.Faultedslopessurroundingthesourcekitchens,paleo-highsaretheadvantageousexplorationareas.Inaddition,thest