渤海湾盆地歧口凹陷盆地结构构造及演化
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摘要
依托歧口凹陷最新超大面积三维地震对歧口凹陷结构构造、断裂活动及盆地演化特征开展系统研究,明确歧口凹陷古近纪早期(沙三早期)几个次凹间连通较好,到沙一末期、东营期逐渐受潜山构造的不断隆升而以水下低隆起相隔,控制了物源及水体。歧口凹陷具多期断裂活动叠加、断裂复杂的特点,其内部主要断裂在沙三期活动弱或不活动,沙一期、东营期是断裂主要活动期;歧口凹陷断裂活动有4幕:沙三中期、沙一中期、东营末期及明化镇末期,与研究区内规模较大的3期角度不整合:沙三1亚段底、沙一上亚段底和馆陶组底的形成关系密切。歧口凹陷具有显著的幕式构造演化的特征,可分为同裂陷和热沉降2个阶段,进一步可细化为裂陷Ⅰ幕(沙三段—沙二段沉积时期)、裂陷Ⅱ幕(沙一段—东营组沉积时期)、稳定热沉降幕(馆陶组—明化镇组沉积早期)和加速沉降幕(明化镇组沉积中后期)。
We use the new obtained super-large area 3D seismic data to deduce the structure feature,fault activities & tectonic evolution in the Qikou sag.The results show that a good connection between sub-sags would occur at early Paleogene Period(Es3).The separation between water and deposits was happened by the gradually uplift of the buried hill at the end of Es1-Ed tectonics.The superimposition of different phase tectonics was observed in the Qikou sag.With exception of boundary faults,the main faults in the Qikou sag were not active or moved weakly at the Es3 Period.We divide the tectonic activities into 4 epoches in the Qikou sag,including mid-Es3 Epoch,mid-Es1 Epoch,Ed Epoch end and Nm Epoch end.The unconformities exist between Es13,Ed and Ng,respectively.Two typical episodic stages in the Qikou sag could be divided,such as chasmic stage and thermal-depress stage.The two typical stages subdivide into four sub-epoches like as chasmic Ⅰ(Es3-Es2),chasmic Ⅱ(Es1-Ed),stable-thermal-depress epoch(Ng-Nmx) & accelerrate-thermal-depress epoch(after Nmx).
We use the new obtained super-large area 3D seismic data to deduce the structure feature,fault activities & tectonic evolution in the Qikou sag.The results show that a good connection between sub-sags would occur at early Paleogene Period(Es3).The separation between water and deposits was happened by the gradually uplift of the buried hill at the end of Es1-Ed tectonics.The superimposition of different phase tectonics was observed in the Qikou sag.With exception of boundary faults,the main faults in the Qikou sag were not active or moved weakly at the Es3 Period.We divide the tectonic activities into 4 epoches in the Qikou sag,including mid-Es3 Epoch,mid-Es1 Epoch,Ed Epoch end and Nm Epoch end.The unconformities exist between Es13,Ed and Ng,respectively.Two typical episodic stages in the Qikou sag could be divided,such as chasmic stage and thermal-depress stage.The two typical stages subdivide into four sub-epoches like as chasmic Ⅰ(Es3-Es2),chasmic Ⅱ(Es1-Ed),stable-thermal-depress epoch(Ng-Nmx) & accelerrate-thermal-depress epoch(after Nmx).
引文
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[12]Qi Peng,Ren Jianye,Shi Shuangshuang,et al.Features of theCenozoic structure of the coastal zone in Qikou sag and itsformation mechanism[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.]
[13]Zhou Lihong,Wu Yongping,Xiao Dunqing,et al.Characteris-tics of the Tertiary igneous rock andinvestigation of their re-lationships with hydrocarbonin Huanghua depression[J].Ac-ta Petrolei Sinica,2000,21(6):29-34.[周立宏,吴永平,肖敦清,等.黄骅坳陷第三系火成岩与油气关系探讨[J].石油学报,2000,21(6):29-34.]
[14]Cheng Yongsheng,Chen Songling,Wang Hai,et al.LowerTertiary petroleumsystemin Leting sag,Bohai Bay basin[J].Natural Gas Geoscience,2007,18(6):854-858,863.[成永生,陈松岭,王海,等.渤海湾盆地乐亭凹陷下第三系含油气系统[J].天然气地球科学,2007,18(6):854-858,863.]
[2]Qu Fang,Chen Qinghua,Lian Chengbo,et al.Faulted struc-ture systems of Huanghua depressionin 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.]
[3]Wu Xingning,Zhou Jianxun.The anatomy about the tectoniccause of formation of Bohai wan 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.]
[4]Li Pengju,Lu Huafu,Shi Yangshen.Study on the formation and fault structures of the Dongpu depression of Bohai Gulf,east China[J].Journal of Nanjing University:Natural Sci-ences,1995,31(1):128-139.[李鹏举,卢华复,施央申.渤海湾盆地东濮凹陷的形成及断裂构造研究[J].南京大学学报:自然科学,1995,31(1):128-139.]
[5]Su Junqing,Zhao Houxiang,Qian Maolu,et al.The hydrocar-bon formation and accumulation control factors research ofQikou depression[J].Xinjiang Geology,2009,27(4):383-386.[苏俊青,赵厚祥,钱茂路,等.歧口凹陷湖盆特征及对油气成藏控制作用研究[J].新疆地质,2009,27(4):383-386.]
[6]Qi Jiafu,Xia Yiping,Yang Qiao.Tectonic Structure Analysisin Oil Zone[M].Beijing:PetroleumIndustry Press,2006:25-29.[漆家福,夏义平,杨桥.油区构造解析[M].北京:石油工业出版社,2006:25-29.]
[7]Zou Dongbo,Wu Shiguo,Liu Gang,et al.The features of theNNE trending faults and its i mplication for hydrocarbon inthe Zhuanghai area,Bohai wan basin[J].Natural Gas Geosci-ence,2004,15(5):503-507.[邹东波,吴时国,刘刚,等.渤海湾盆地桩海地区NNE向断层性质及其对油气的影响[J].天然气地球科学,2004,15(5):503-507.]
[8]Dai Junsheng,Lu Kezheng,Qi Jiafu,et al.Structure style evo-lutionin 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.]
[9]Fan Jingliang,Huang Zhiquan,Fan Weihua.Cenozoic tectonicevolution of Qikou sag and its relations to hydrocarbon trapsin Bohai Bay basin of east China[J].Journal of Jiling Univer-sity:Earth Science 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.]
[10]Zhang Yanzhang,Li Shuen,Luo Shuiyu,et al.Recent evidenceof the Tangdong tectonic zone trike-slip fault in Qikou de-pressed basin andit′s significance in exploration[J].XinjiangGeology,2005,23(4):410-412.[张延章,李淑恩,罗水余,等.歧口凹陷唐东走滑断裂存在的证据及勘探意义[J].新疆地质,2005,23(4):410-412.]
[11]Xiao Shangbin,Gao Xilong,Jiang Zaixing,et al.Cenozoic dex-tral strike-slip motion in Bohai Bay basin and its meaning topetroleumgeology[J].Geotectonic et Metalogenia,2000,24(4):321-328.[肖尚斌,高喜龙,姜在兴,等.渤海湾盆地新生代的走滑活动及其石油地质意义[J].大地构造与成矿学,2000,24(4):321-328.]
[12]Qi Peng,Ren Jianye,Shi Shuangshuang,et al.Features of theCenozoic structure of the coastal zone in Qikou sag and itsformation mechanism[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.]
[13]Zhou Lihong,Wu Yongping,Xiao Dunqing,et al.Characteris-tics of the Tertiary igneous rock andinvestigation of their re-lationships with hydrocarbonin Huanghua depression[J].Ac-ta Petrolei Sinica,2000,21(6):29-34.[周立宏,吴永平,肖敦清,等.黄骅坳陷第三系火成岩与油气关系探讨[J].石油学报,2000,21(6):29-34.]
[14]Cheng Yongsheng,Chen Songling,Wang Hai,et al.LowerTertiary petroleumsystemin Leting sag,Bohai Bay basin[J].Natural Gas Geoscience,2007,18(6):854-858,863.[成永生,陈松岭,王海,等.渤海湾盆地乐亭凹陷下第三系含油气系统[J].天然气地球科学,2007,18(6):854-858,863.]
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