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1、石油勘探與開發(fā)1962010年4月PETROLEUMEXPLORATIONANDDEVELOPMENTVo137No.2.文章編號(hào):1000—0747(2010)02—0196—07東濮凹陷裂縫性砂巖油氣藏主控因素及成藏模式趙良金,楊廣林,王瑞飛。,黃新文,李新軍。,安紅梅(1.中國科學(xué)院廣州地球化學(xué)研究所;2.中國石化中原油田分公司勘探開發(fā)科學(xué)研究院;3.中國石化中原油田博士后科研工作站;4.中國石化中原油田分公司)摘要:渤海灣盆地臨清坳陷東濮凹陷中央隆起帶北部發(fā)現(xiàn)三疊系裂縫性砂巖油氣藏,油氣主要富集在巖石節(jié)理、裂縫、縫洞中,基質(zhì)不含油。通過對(duì)油氣族組成、穩(wěn)定碳同位素組
2、成及生物標(biāo)志化合物進(jìn)行油氣地球化學(xué)研究,認(rèn)為東濮凹陷三疊系砂巖裂縫性油藏原油來源于古近系,油藏類型為新生古儲(chǔ)式;天然氣來源于石炭一二疊系,氣藏類型為古生新儲(chǔ)式。在油氣地球化學(xué)研究的基礎(chǔ)上,分析東濮凹陷三疊系砂巖裂縫性油藏成藏條件,認(rèn)為供烴條件、儲(chǔ)集空間、構(gòu)造部位是油氣成藏的主控因素。供烴條件決定油氣藏規(guī)模、裂縫提供油氣儲(chǔ)集空間、構(gòu)造控制油氣成藏位置。根據(jù)東濮凹陷中央隆起帶北部不同地區(qū)三疊系儲(chǔ)集層構(gòu)造特征、供烴條件、油氣藏特征,總結(jié)出東濮凹陷北部三疊系砂巖裂縫性油氣藏的3種成藏模式,即:雙斷雙向供烴成藏、單斷雙向供烴成藏、單斷單向供烴成藏。圖10表1參15關(guān)鍵詞:東濮凹陷;
3、三疊系;裂縫性砂巖儲(chǔ)集層;主控因素;成藏模式中圖分類號(hào):TEl22.1文獻(xiàn)標(biāo)識(shí)碼:AKeycontrollingfactorsandreservoir—formingmodelofthefracturedsandstonereservoirsinDongpuSagZhaoLiangjin,YangGuanglin,WangRuifei。,HuangXinwen,LiXinjun,AnHongmei(1.GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,GuangZhou510000,China;2.Geop
4、hysicalResearchInstitute,SinopecZhongyuanOilfieldCompany,Puyang457001,China;3.PostdoctorWorkstation,SinopecZhongyuanOilfield,Puyang457001,China;4.ZhongyuanOilfieldCompany,Sinopec,Puyang457001,Cn)Abstract:TriassicfracturedsandstonereservoirshavebeenfoundinthenorthofCentralUpliftinDongpuSag
5、,LinqingDepression,BohaiBayBasin.Hydrocarbonsaccumulateinjoints,fractures,andcavities.Thereisnooilinthematrix.Theanalysisofgroupcomponent,stablecarbonisotopiccompositionsandbiomarker,andthegeochemicalcharacteristicsoftheoilandgasshowthattheoilcomesfromthePalaeogeneandtheoilreservoirisnewb
6、ed—generatingandoldbed-storing;thegascomesfromCarboniferous—Permianandthegasreservoirisoldbed—generatingandnewbed—storing.Basedonthegeochemicalcharacteristicsoftheoilandgas,theformingconditionswereanalyzed.Themaincontrollingfactorsofreservoirformationaresourcerock,storagespace,andstructur
7、allocation.Theconditionofhydrocarbongenerationcontrolsthereservoirscale,thefracturecontrolsspace,andthestructurecontrolstheoil/gasreservoirlocation.BasedontheTriassicreservoircharacteristicsofstructure,conditionofhydrocarbongenerationandoil/gasreservoir,thereservoir