歧口凹陷新生代伸展断裂展布及演化特征
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摘要
依托最新采集的5 280km2二次三维地震数据解释成果,对歧口凹陷的伸展断裂系开展系统分析。研究认为歧口凹陷内一级、二级主要伸展断裂滚动演化特征在一定程度上是整个盆地断裂演化特征的缩影,故重点分析了沧东断裂、滨海断裂等的演化特征。歧口凹陷新生代主要伸展断裂的活动表现出分段性、迁移性、旋回性和长期性四大特点。横向上具有由SW向向NE向滚动演化的特征,体现了断裂活动的分段性和迁移性特点;在纵向上断裂的活动可分为4幕,即沙三中期、沙一中期、东营末期及明化镇末期,沙一期、东营期是断裂主要活动期,体现了断裂活动的旋回性和长期性特点。
We use the secondary interpretation result of new collecting 5 280km2 3D seismic data to discuss the extension fracture system in the Qikou sag.We think that the first and second order main stretch fracture with rolling evolution characteristics in the Qikou sag is to some extent the typical aspect of the whole basin fault evolution.Thus,we emphatically discuss the evolution of the Cangdong and Binhai faults.The main extensive fault activity in the Qikou sag is representative of the stepwise,migratory aptitude,cyclicity & long term behavior in Cenozoic.The fault activity rolled horizontally from SW to NE direction,reflecting the stepwise and migratory aptitude.The fault activities can be divided vertically into four phases,including mid-Es3 Epoch,mid-Es1 Epoch,end of Ed Epoch,and end of Nm Epoch.Mid-Es1 and Ed Epochs are the main active time of the faults,suggesting the cyclicity and long term behavior of the fault activities.
We use the secondary interpretation result of new collecting 5 280km2 3D seismic data to discuss the extension fracture system in the Qikou sag.We think that the first and second order main stretch fracture with rolling evolution characteristics in the Qikou sag is to some extent the typical aspect of the whole basin fault evolution.Thus,we emphatically discuss the evolution of the Cangdong and Binhai faults.The main extensive fault activity in the Qikou sag is representative of the stepwise,migratory aptitude,cyclicity & long term behavior in Cenozoic.The fault activity rolled horizontally from SW to NE direction,reflecting the stepwise and migratory aptitude.The fault activities can be divided vertically into four phases,including mid-Es3 Epoch,mid-Es1 Epoch,end of Ed Epoch,and end of Nm Epoch.Mid-Es1 and Ed Epochs are the main active time of the faults,suggesting the cyclicity and long term behavior of the fault activities.
引文
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[4]Qu Fang,Chen Qinghua,Lian Chengbo,et al.Faulted struc-ture systems of Huanghua depression in Cenozoic Era[J].Pe-troleum Geology and Recovery Efficiency,2006,13(5):7-10.[渠芳,陈清华,连承波,等.黄骅坳陷新生代断裂构造系统研究[J].油气地质与采收率,2006,13(5):7-10.]
[5]Wu Xingning,Zhou Jianxun.The anatomy about the tectoniccause of formation of Bohaiwan basin[J].Progress in Geo-physics,2003,15(1):98-107.[吴兴宁,周建勋.渤海湾盆地构造成因观点剖析[J].地球物理学进展,2003,15(1):98-107.]
[6]Dai Junsheng,Lu Kezheng,Qi Jiafu,et al.Structure style evolu-tion in Paleogene Bohai Bay basin[J].Acta Petrolei Sinica,1998,19(4):16-20.[戴俊生,陆克政,漆家福,等.渤海湾盆地早第三纪构造样式的演化[J].石油学报,1998,19(4):16-20.]
[7]Fan Jingliang,Huang Zhiquan,Fan Weihua.Cenozoic tectonic evo-lution of Qikou sag and its relations to hydrocarbon traps in BohaiBay basion of east China[J].Journal of Jilin Unviersity:Earth Sci-ence Edition,2004,34(4):536-541.[樊敬亮,黄志全,樊卫花.歧口凹陷新生代构造演化与油气[J].吉林大学学报:地球科学版,2004,34(4):536-541.]
[8]Qi Peng,Ren Jianye,Shi Shuangshuang,et al.Features of the Ce-nozoic structure of the coastal zone in Qikou sag and its formationmechanism[J].Acta Petrolei Sinica,2010,31(6):900-905.[祁鹏,任建业,史双双,等.歧口凹陷沿岸带新生代构造特征及其形成机制[J].石油学报,2010,31(6):900-905.]
[9]Zhou Lihong,Lu Yi,Xiao Dunqing,et al.Basinal texturestructure of Qikou sag in Bohai Bay basin and its evolution[J].Natural Gas Geoscience,2011,22(3):373-382.[周立宏,卢异,肖敦清,等.渤海湾盆地歧口凹陷盆地结构构造及演化[J].天然气地球科学,2011,22(3):373-382.]
[10]Lu Yi,Wang Shuxiang,Chen Song,et al.Computing methodabout intensity of fault activity and its application[J].NaturalGas Geoscience,2010,21(4):612-616.[卢异,王书香,陈松,等.一种断裂活动强度计算方法及其应用[J].天然气地球科学,2010,21(4):612-616.]
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