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1、第32卷第3期石油霧劈飽質(zhì)Vo1.32,No.32010年6月PETRoLEUMGEoLoGY&EXPERIMENTJun..2O1O文章編號(hào):1001—6112(2010】03-021107遼河盆地中部構(gòu)造演化與古潛山油氣成藏模式張慶龍,葛榮峰,趙立文,杜彥彥。,慕德良(1.南京大學(xué)地球科學(xué)與工程學(xué)院,南京210093;2.遼河金馬油田股份有限公司,遼寧盤錦124000;3.中國石油大學(xué)(北京)資源與信息學(xué)院,北京102200)摘要:通過區(qū)域性平衡地質(zhì)剖面的構(gòu)建與定量恢復(fù),揭示出遼河盆地中部構(gòu)造演化經(jīng)歷了晚中生代初始伸展、古新世一始新世強(qiáng)烈伸展、漸新
2、世右旋張扭改造及中新世以來坳陷萎縮等4個(gè)階段,并計(jì)算了每個(gè)階段的地殼伸展量、伸展率、伸展速率等參數(shù),為演化過程提供了詳細(xì)的定量約束。中央凸起南部傾沒端古潛山斷裂構(gòu)造特征指示其可能是起源于晚中生代郯廬斷裂帶左旋走滑派生的次級剪切破裂,但受新生代強(qiáng)烈伸展作用影響,張性增強(qiáng),提高了油氣運(yùn)移和儲(chǔ)集能力。漸新世郯廬斷裂帶發(fā)生右旋走滑,派生了新的Ew向張性斷裂,控制了油氣的分布。結(jié)合該區(qū)石油地質(zhì)特征,推斷古潛山表層不整合面上的局部構(gòu)造高點(diǎn)以及古潛山內(nèi)幕大斷裂端點(diǎn)、拐點(diǎn)、交匯點(diǎn)可能是古潛山油氣成藏的有利區(qū)域。關(guān)鍵詞:平衡剖面;構(gòu)造裂縫;古潛山;郯廬斷裂帶;遼河盆地中
3、圖分類號(hào):TE122.3文獻(xiàn)標(biāo)識(shí)碼:ASTRUCTURALEVoLUTIoNANDMoDELoFHYDRoCARBoNACCIMI丁I伽oNINBI刀RIEDHⅡSINTHECENTRAILL)HEBASINZhangQinglong,GeRongfeng,ZhaoLiwen,DuYanyan。,MuDeliang’。(1.SchoolofEarthSciencesandEngineering,NanjingUniversity,Nanjing,Jiangsu210093,China;2.LiaoheJinmaOilfieldCompan3,Lirai
4、ted,Panjing,Liaoning124000,China;3.FacultyofNaturalResourceandInformationTechnology,(~inaUniversityofPetroleum,Beijing102200,China)Abstract:Theconstructionandquantitativerestorationofregionalbalancedcross—sectionsinthecentralLiaoheBasinhaverevealedfourtectonicevolutionstages:the
5、IateMesozoicinitiaIrifting,thePaleocene—Eoceneintensiverifting,theOligocenedextraltranstensionandthedepressionsincetheMiocene.Theamounts,ratiosandratesofcrustalextensionwereestimated,providingdetailedconstraintstoeachev—olutionalstage.Thecharacteristicsoffracturesontheburiedhill
6、satthesoutherncentra1upliftofLiao'heBasinweresuggestedthattheywereprobablysecondaryshearfracturesinducedbythesinistralstrike——slipofTanlufaultduringthelateMesozoic.Thesefractures,however,werealteredtobecompetentforhydrocarbonmigrationandreservationduringtheCenozoicriftingstage.D
7、extralstrike—slipwastakenplaceontheTanlufaultduringtheOligoceneandnewEWfractureswereproduced。whichcon—trolledthehydrocarbondistributioninthisregion.Intermsofpetroleumgeologywesuggestedthatthelocalhighsontheunconformitysurfaceandthefaultterminations,inflexionsorintersectionsinthe
8、bur—iedhillswerethepotentialtargetsofhydrocarbo