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时间:2019-05-22
《辽河盆地中部构造演化与古潜山油气成藏模式》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第3期石油雾劈饱质Vo1.32,No.32010年6月PETRoLEUMGEoLoGY&EXPERIMENTJun..2O1O文章编号:1001—6112(2010】03-021107辽河盆地中部构造演化与古潜山油气成藏模式张庆龙,葛荣峰,赵立文,杜彦彦。,慕德良(1.南京大学地球科学与工程学院,南京210093;2.辽河金马油田股份有限公司,辽宁盘锦124000;3.中国石油大学(北京)资源与信息学院,北京102200)摘要:通过区域性平衡地质剖面的构建与定量恢复,揭示出辽河盆地中部构造演化经历了晚中生代初始伸展、古新世一始新世强烈伸展、渐新
2、世右旋张扭改造及中新世以来坳陷萎缩等4个阶段,并计算了每个阶段的地壳伸展量、伸展率、伸展速率等参数,为演化过程提供了详细的定量约束。中央凸起南部倾没端古潜山断裂构造特征指示其可能是起源于晚中生代郯庐断裂带左旋走滑派生的次级剪切破裂,但受新生代强烈伸展作用影响,张性增强,提高了油气运移和储集能力。渐新世郯庐断裂带发生右旋走滑,派生了新的Ew向张性断裂,控制了油气的分布。结合该区石油地质特征,推断古潜山表层不整合面上的局部构造高点以及古潜山内幕大断裂端点、拐点、交汇点可能是古潜山油气成藏的有利区域。关键词:平衡剖面;构造裂缝;古潜山;郯庐断裂带;辽河盆地中
3、图分类号:TE122.3文献标识码: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
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