渤海湾盆地南堡凹陷的背形负花状构造
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摘要
花状构造以其独特的构造样式而成为在剖面上识别走滑构造的重要标志.经典的花状构造包括正花状构造和负花状构造.渤海湾盆地南堡凹陷发育一种新型的花状构造——背形负花状构造.在三维地震剖面上,背形负花状构造是由一束向上、向外撒开的大多数为正离距的离散的走滑断层或转换伸展断层所限定的,下部呈"向形",上部呈"背形"的组合样式.平面上,褶皱和相关正断层呈雁行排列.背形负花状构造发育于南堡凹陷转换伸展的构造背景.浅层的"背形"是由转换伸展断层牵引塑性的盖层而形成的一种强制褶皱.该构造经历了牵引背斜形成和背斜脊部断裂-塌落两个发育阶段.背形负花状构造普遍发育于渤海湾盆地的新近系.
Flower structures are specific modes of formation,and their distinctive characteristics make them important criteria for the identification of a strike-slip zone in vertical cross-sections and on seismic profiles.Two element types of the classical flower structures were respectively negative and positive flower structures.There is a new kind of flower structure termed antiformal negative flower structures in Nanpu sag,Bohai Bay basin.A antiformal negative flower structure in 3D seismic profiles from the Nanpu sag consists of a shallow antiform and a deep synform bounded by upward and outward spreading strands of a strike-slip fault that have mostly normal separations.In map-view,the folds and associated normal faults present an en echelon arrangement.Antiformal negative flower structure formed in the transtensional setting of Nanpu sag.The shallow antiform is forced folds caused by the transtensional faults dragging cover into folds.Antiformal negative flower structure undergone two phases of deformation including:(1) forming of drag fold and(2) fualting and collapsing of the fold crest.The antiformal negative flower structures are a widespread structural styles in the Neogene of the Bohai Bay basin.
Flower structures are specific modes of formation,and their distinctive characteristics make them important criteria for the identification of a strike-slip zone in vertical cross-sections and on seismic profiles.Two element types of the classical flower structures were respectively negative and positive flower structures.There is a new kind of flower structure termed antiformal negative flower structures in Nanpu sag,Bohai Bay basin.A antiformal negative flower structure in 3D seismic profiles from the Nanpu sag consists of a shallow antiform and a deep synform bounded by upward and outward spreading strands of a strike-slip fault that have mostly normal separations.In map-view,the folds and associated normal faults present an en echelon arrangement.Antiformal negative flower structure formed in the transtensional setting of Nanpu sag.The shallow antiform is forced folds caused by the transtensional faults dragging cover into folds.Antiformal negative flower structure undergone two phases of deformation including:(1) forming of drag fold and(2) fualting and collapsing of the fold crest.The antiformal negative flower structures are a widespread structural styles in the Neogene of the Bohai Bay basin.
引文
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Zolnai,G.,1991.Continental wrench—tectonics and hydro-carbon habitat.AAPG Continuing Education CourseNotes30(Second edition,Revised),1-38.
邓运华,2001.郯庐断裂带新构造运动对渤海东部油气聚集的控制作用.中国海上油气(地质),15(5):301-305.
董月霞,汪泽成,郑红菊,等,2008.走滑断层作用对南堡凹陷油气成藏的控制.石油勘探与开发,35(4):424-430.
王国纯,1998.郯庐断裂与渤海海域反转构造及花状构造.中国海上油气(地质),12(5):289-295.
徐安娜,郑红菊,董月霞,等,2006.南堡凹陷东营组层序地层格架及沉积相预测.石油勘探与开发,33(4):437-443.
严俊君,马前贵,1992.渤海海域的郑庐扭断裂及含油气盆地的发育.地球科学——中国地质大学学报,17(1):31-38.
姚超,焦贵浩,王同和,等,2004.中国含油气构造样式.北京:石油工业出版社,1-517.
周海民,董月霞,刘蕴华,等,2001.小型断陷盆地油气勘探理论与实践——以渤海湾盆地南堡凹陷为例.北京:石油工业出版社,1-250.
周海民,魏忠文,曹中宏,等,2000.南堡凹陷的形成演化与油气的关系.石油与天然气地质,21(4):345-349.
Cosgrove,J.W.,Ameen,M.S.,2000.Forced folds and frac-tures.Geological Society Special Publication,169:1-225.
Deng,Y.H.,2001.Control of the neotectonism alongTancheng-Lujiang fracture zone on hydrocarbon accu-mulationin the eastern Bohai Sea.China Offshore Oiland Gas(Geology),15(5):301-305(in Chinese withEnglish abstract).
Dong,Y.X.,Wang,Z.C.,Zheng,H.J.,et al.,2008.Controof strike-slip faulting on reservoir formation of oil andgas in Nanpu sag.PetroleumExploration and Develop-ment,35(4):424-430(in Chinese with English ab-stract).
Harding,T.P.,1985.Seismic characteristics and identifica-tion of negative flower structures,positive flower struc-tures,and positive structural inversion.AAPGBulletin,69:582-600.
Harding,T.P.,Lwell,J.D.,1979.Structural styles,theirplate tectonic province.AAPG Bulletin,63:1016-1058.
Wang,G.C.,1998.Relationship of Tanlu fault to the inver-sion and flower structures in Bohai Bay.China Off-shore Oil and Gas(Geology),12(5):289-295(in Chi-nese with English abstract).
Xu,A.N.,Zheng,H.J.,Dong,Y.X.,et al.,2006.Sequencestratigraphic framework and sedi mentary facies predic-tion in Dongying Formation of Nanpu sag.PetroleumExploration and Development,33(4):437-443(inChinese with English abstract).
Yan,J.J.,Ma,Q.G.,1992.The Tancheng-Lujiang wrenchfault systemin Bohai Bay area.Earth Science—Journalof China University of Geosciences,17(1):31-38(inChinese with English abstract).
Yao,C.,Jiao,G.H.,Wang,T.H.,et al.,2004.Petroliferousstructural styles in China.Petroleum Industry Press,Beijing,1-517(in Chinese).
Zhou,H.M.,Dong,Y.X.,Liu,Y.H.,et al.,2001.Theoryand practice of hydrocarbon exploration in small riftedbasin:a case study of the Nanpu sag of the Bohai Baybasin.University of Petroleum Press,Beijing,1-250(in Chinese).
Zhou,H.M.,Wei,Z.W.,Cao,Z.H.,et al.,2000.Relation-ship between formation,evolution and hydrocarbon inthe Nanpu sag.Oil&Gas Geology,21(4):345-349(in Chinese with English abstract).
Zolnai,G.,1991.Continental wrench—tectonics and hydro-carbon habitat.AAPG Continuing Education CourseNotes30(Second edition,Revised),1-38.
邓运华,2001.郯庐断裂带新构造运动对渤海东部油气聚集的控制作用.中国海上油气(地质),15(5):301-305.
董月霞,汪泽成,郑红菊,等,2008.走滑断层作用对南堡凹陷油气成藏的控制.石油勘探与开发,35(4):424-430.
王国纯,1998.郯庐断裂与渤海海域反转构造及花状构造.中国海上油气(地质),12(5):289-295.
徐安娜,郑红菊,董月霞,等,2006.南堡凹陷东营组层序地层格架及沉积相预测.石油勘探与开发,33(4):437-443.
严俊君,马前贵,1992.渤海海域的郑庐扭断裂及含油气盆地的发育.地球科学——中国地质大学学报,17(1):31-38.
姚超,焦贵浩,王同和,等,2004.中国含油气构造样式.北京:石油工业出版社,1-517.
周海民,董月霞,刘蕴华,等,2001.小型断陷盆地油气勘探理论与实践——以渤海湾盆地南堡凹陷为例.北京:石油工业出版社,1-250.
周海民,魏忠文,曹中宏,等,2000.南堡凹陷的形成演化与油气的关系.石油与天然气地质,21(4):345-349.
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