渤海湾盆地临南洼陷张扭构造演化及应力场数值模拟
摘要
为了考察渤海湾盆地临南洼陷张扭构造的发育特征和成因机制,在解释30余条三维地震剖面的基础上,估算及分析伸展率在时间和空间上的变化规律,绘制了Es3—Es1、Ed和Ng—Nm3个时期的断层平面展布图,利用FEPG有限元软件,建立二维线弹性数值模型,模拟了3个时期的构造应力场。结果表明,临南洼陷的最大主应力和最大剪应力,在平面上都是东北部大、西南部小;从Es3时期到Nm时期,最大主应力和最大剪应力都是逐渐减小的,数值模型边界上的剪应力分量均大于张应力分量,而且剪应力分量与张应力分量的比值是逐渐增加的。通过研究,将临南洼陷张扭构造发育的力学机制量化,并为郯庐断裂和兰聊断裂在惠民凹陷乃至渤海湾盆地的作用时间、方式的研究提供参考。
To investigate characteristics and formation mechanism of transtentional structures developed in Linnan subsag of the Bohai Bay basin,more than 30 3-D seismic sections have been interpreted,temporal and spatial distributions of extension rates have been estimated and analyzed,and the planar distribution of faults in three stages,Es3-Es1,Ed and Ng-Nm,have been plotted.2-D linear elastic numerical models have been established to simulate the stress field of the above mentioned three stages,using finite element software FEPG.The results reveal that,the maximum principal stress and maximum shear stress in the northeast of Linnan subsag are larger than those in the southwest; from Es3 to Nm,all the maximum principal stress and maximum shear stress decrease gradually; the shear stresses are larger than tensile ones on the boundary of numerical model at all the three stages,while the ratio of shear to tensile stress increases gradually.Through the study,dynamical mechanism of tense-shearing structure developed in Linnan subsag can be quantified,which is helpful to study the time and ways of Tanlu fault and Lanliao fault effects on Huimin depression or even on Bohai Bay basin.
To investigate characteristics and formation mechanism of transtentional structures developed in Linnan subsag of the Bohai Bay basin,more than 30 3-D seismic sections have been interpreted,temporal and spatial distributions of extension rates have been estimated and analyzed,and the planar distribution of faults in three stages,Es3-Es1,Ed and Ng-Nm,have been plotted.2-D linear elastic numerical models have been established to simulate the stress field of the above mentioned three stages,using finite element software FEPG.The results reveal that,the maximum principal stress and maximum shear stress in the northeast of Linnan subsag are larger than those in the southwest; from Es3 to Nm,all the maximum principal stress and maximum shear stress decrease gradually; the shear stresses are larger than tensile ones on the boundary of numerical model at all the three stages,while the ratio of shear to tensile stress increases gradually.Through the study,dynamical mechanism of tense-shearing structure developed in Linnan subsag can be quantified,which is helpful to study the time and ways of Tanlu fault and Lanliao fault effects on Huimin depression or even on Bohai Bay basin.
引文
[1]吴智平.临南地区张扭构造演化及其油气输导作用的研究中期成果报告,2008.
[1]李三忠,许淑梅,单业华,等.渤海湾及邻区构造演化与盆地组合规律[J].海洋学报,2000,22(增刊):220-229.[LI Sanzhong,XU Shumei,SHAN Yehua,et al.Tectonic evolution and basin assemblage in the Bohai Bay and its neighbors[J].Acta Oceanologica Sinica,2000,22(Supp.):220-229].
[2]Li S Z,Kusky T M,Zhao G,et al.Mesozoic tectonics in the Eastern Block of the North China Craton:i mplications for sub-duction of the Pacific Plate beneath the Eurasian Plate[C]//Mesozoic Sub-Continental Lithoshperic Thinning Under East-ern Asia.Geological Society,London,Special Publications,2007,280:171-180.
[3]宗国洪,肖焕钦,李长宝,等.济阳坳陷构造演化及其大地构造意义[J].高校地质学报,1999,5(3):275-282.[ZONG Guo-hong,XI AO Huanqin,LI Changbao,et al.Evolution of Jiyang depression andits tectonic i mplications[J].Geological Journal of China Universities,1999,5(3):275-282].
[4]朱光,王道轩,刘国生,等.郯庐断裂带的演化及其对西太平洋板块运动的响应[J].地质科学,2004,39(1):36-49.[ZHU Guang,WANG Daoxuan,LI U Guosheng,et al.Evolution of the Tan-Lu fault zone andits responses to plate movements in west pacific basin[J].Chinese Journal of Geology,2004,39(1):36-49].
[5]刘建忠,李三忠,周立宏,等.华北板块东部中生代构造演化与盆地格局[J].海洋地质与第四纪地质,2004,24(4):45-54.[LI UJianzhong,LI Sanzhong,ZHOU Lihong,et al.Mesozoic tectonics and basin distribution in the eastern North China plate[J].Marine Geology and Quaternary Geology,2004,24(4):45-54].
[6]胜利油田石油地质志编写组.中国石油地质志(卷六):胜利油田分卷[M].北京:石油工业出版社,1993.[Editorial Commit-tee of Shengli Oil Field Petroleum Geology.Petroleum Geology of China(Vol.6):Shengli Oil Field[M].Beijing:PetroleumIn-dustry Press,1993].
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[10]付金华.惠民凹陷夏口断裂带油气成藏机制研究[J].石油实验地质,2002,24(2):137-140.[FU Jinhua.Pool-forming mechanismof the Xiakou faulted zone in the Hui min Depres-sion[J].Petroleum Geology and Experi ment,2002,24(2):137-140].
[11]韩露,尉晓玮,张贵宾.有限元等数值模拟方法在我国岩石圈构造研究中的应用与发展[J].地球物理学进展,2004,19(4):953-960.[HAN Lu,WEI Xiaowei,ZHANG Guibin.Applica-tion and development of finite-element numerical modeling method in China lithosphere structure study[J].Progress in Geophysics,2004,19(4):953-960].
[12]李丕龙.陆相断陷盆地油气地质与勘探(卷一):陆相断陷盆地构造演化与构造样式[M].北京:石油工业出版社,地质出版社,2003.[LI Pilong.Petroleum Geology and Exploration of Continental Fault Basin(Vol.1):Tectonic Evolvement and Tectonic Patterns of Continental Fault Basin[M].Beijing:Pe-troleumIndustry Press,Geological Publishing House,2003].
[13]Zhao G C,Sun M,Wilde Si mon,et al.Late Archean to Paleo-proterozoic evolution of the North China Craton:key issues revisited[J].Precambrian Research,2005,136:177-202.
[14]徐义刚.华北岩石圈减薄的时空不均一特征[J].高校地质学报,2004,10(3):324-331.[XU Yigang.Lithospheric thinning beneath North China:Atemporal and spatial perspective[J].Geological Journal of China Universities,2004,10(3):324-331].
[15]林舸,赵崇斌,肖焕钦,等.华北克拉通构造活化的动力学机制与模型[J].大地构造与成矿学,2008,32(2):133-142.[LI N Ge,ZHAO Chongbin,XI AO Huanqin,et al.Dynamic mecha-nisms and models of tectonic activization in North China cra-ton[J].Geotectonica et Metallogenia,2008,32(2):133-142].
[16]赵密福,刘泽容,信荃麟,等.惠民凹陷临南地区断层活动特征及控油作用[J].石油勘探与开发,2000,27(6):9-11.[ZHAO Mifu,LI U Zerong,XI N Quanlin,et al.Fault activity features and its control over oil of Linnan area in Hui min depression[J].Petroleum Exploration and Development,2000,27(6):9-11].
[17]韩天佑,石颐.惠民凹陷临南地区新生代构造演化特征研究[J].东华理工大学学报,2004,27(4):309-314.[HAN Tiany-ou,SHI Yi.The characteristics of Neozoic structural evolve-ment of Linnan area in Hui min Sag[J].Journal of East China Institute of Technology,2004,27(4):309-314].
[18]Wilcox R E,Harding T P,Seely D R.Basin wrech tectonics[J].Bull.Am.Assoc.Petrol.Geol.,1973,57:74-96.
[19]侯青,赵健,回春,等.惠民凹陷构造应力场与油气运聚模拟分析[J].油气地质与采收率,2006,13(1):62-65.[HOU Qing,ZHAOJian,HUI Chun,et al.Si mulation analysis of the tec-tonic stress field and the oil-gas migration-accumulation in Hui min Sag[J].Petroleum Geology and Recovery Efficiency,2006,13(1):62-65].
[20]王伟锋,陆诗阔,金强.中国大陆东部盆地构造动力学分析[J].石油大学学报:自然科学版,1999,23(4):1-5.[WANG Weifeng,LU Shikuo,JI N Qiang.Geodynamic of sedi mentary basins in eastern China[J].Journal of the China University of Petroleum,1999,23(4):1-5].
[21]谢富仁,崔效锋,赵建涛,等.中国大陆及邻区现代构造应力场分区[J].地球物理学报,2004,47(4):654-662.[XIE Furen,CUI Xiaofeng,ZHAO Jiantao,et al.Regional division of the recent tectonic stress field in China and adjacent areas[J].Chinese Journal of Geophysics,2004,47(4):654-662].
[22]郭兴伟,施小斌,丘学林,等.渤海湾盆地新生代沉降特征及其动力学机制探讨[J].大地构造与成矿学,2007,31(3):273-280.[GUO Xingwei,SHI Xiaobin,QI U Xuelin,et al.Cenozoic subsidencein Bohai Bay Basin:Characteristics and dynamicha-nism[J].Geotectonica et Metallogenia,2007,31(3):273-280].
[23]漆家福,张一伟,陆克政,等.渤海湾盆地新生代构造演化[J].石油大学学报,1995,19(增刊):1-6.[QI Jiafu,ZHANG Yi-wei,LU Kezheng,et al.Cenozoic tectonic evolution in Bohai Bay Basin Province[J].Journal of the University of Petrole-um,China,1995,19(Supp.):1-6].
[24]万天丰,朱鸿,赵磊,等.郯庐断裂带的形成与演化:综述[J].现代地质,1996,10(2):159-168.[WAN Tianfeng,ZHU Hong,ZHAO Lei,et al.Formation and evolution of Tancheng-Lujiang fault zone:a review[J].Geoscience,1996,10(2):159-168].
[25]程捷,万天丰.郯庐断裂带在新生代的演化[J].地质科技情报,1996,15(3):35-42.[CHENG Jie,WAN Tianfeng.On the activity of the Tancheng-Lujiang fault zone during Cenozoic[J].Geological Science and Technology Information,1996,15(3):35-42].
[26]马杏垣,刘和甫,王维襄,等.中国东部中、新生代裂陷作用和伸展构造[J].地质学报,1983,57(1):22-42.[MA Xingyuan,LI U Hefu,WANG Weixiang,et al.Meso-Cenozoic taphroge-ny and extensional tectonics in eastern China[J].Acta Geo-logica Sinica,1983,57(1):22-42].
[27]吴智平,李伟,郑德顺,等.沾化凹陷中、新生代断裂发育及其形成机制分析[J].高校地质学报,2004,10(3):405-417.[WU Zhiping,LI Wei,ZHENG Deshun,et al.Analysis on features and origins of the Mesozoic and Cenozoic faults in Zhanhua Sag[J].Geological Journal of China Universities,2004,10(3):405-417].
[28]Nothrup C J,Royden L H,Burchfiel B C.Motion of the Pacif-ic plate relative to Eurasia and its potential relation to Ceno-zoic extension along the eastern margin of Eurasia[J].Geolo-gy,1995,23(8):719-722.
[29]池英柳,赵文智.渤海湾盆地新生代走滑构造与油气聚集[J].石油学报,2000,21(2):14-20.[CHI Yingliu,ZHAO Wenzhi.Strike-slip deformation during the Cenozoic and its influence on hydrocarbon accumulationin the Bohai Bay Basin[J].Acta Petrolei Sinica,2000,21(2):14-20].
[1]李三忠,许淑梅,单业华,等.渤海湾及邻区构造演化与盆地组合规律[J].海洋学报,2000,22(增刊):220-229.[LI Sanzhong,XU Shumei,SHAN Yehua,et al.Tectonic evolution and basin assemblage in the Bohai Bay and its neighbors[J].Acta Oceanologica Sinica,2000,22(Supp.):220-229].
[2]Li S Z,Kusky T M,Zhao G,et al.Mesozoic tectonics in the Eastern Block of the North China Craton:i mplications for sub-duction of the Pacific Plate beneath the Eurasian Plate[C]//Mesozoic Sub-Continental Lithoshperic Thinning Under East-ern Asia.Geological Society,London,Special Publications,2007,280:171-180.
[3]宗国洪,肖焕钦,李长宝,等.济阳坳陷构造演化及其大地构造意义[J].高校地质学报,1999,5(3):275-282.[ZONG Guo-hong,XI AO Huanqin,LI Changbao,et al.Evolution of Jiyang depression andits tectonic i mplications[J].Geological Journal of China Universities,1999,5(3):275-282].
[4]朱光,王道轩,刘国生,等.郯庐断裂带的演化及其对西太平洋板块运动的响应[J].地质科学,2004,39(1):36-49.[ZHU Guang,WANG Daoxuan,LI U Guosheng,et al.Evolution of the Tan-Lu fault zone andits responses to plate movements in west pacific basin[J].Chinese Journal of Geology,2004,39(1):36-49].
[5]刘建忠,李三忠,周立宏,等.华北板块东部中生代构造演化与盆地格局[J].海洋地质与第四纪地质,2004,24(4):45-54.[LI UJianzhong,LI Sanzhong,ZHOU Lihong,et al.Mesozoic tectonics and basin distribution in the eastern North China plate[J].Marine Geology and Quaternary Geology,2004,24(4):45-54].
[6]胜利油田石油地质志编写组.中国石油地质志(卷六):胜利油田分卷[M].北京:石油工业出版社,1993.[Editorial Commit-tee of Shengli Oil Field Petroleum Geology.Petroleum Geology of China(Vol.6):Shengli Oil Field[M].Beijing:PetroleumIn-dustry Press,1993].
[7]陈书平,戴俊生,李理.惠民-东营盆地构造特征及控油作用[J].石油与天然气地质,1999,20(4):344-348.[CHEN Shup-ing,DAI Junsheng,LI Li.Tectonic features of Hui min-Dongy-ing Basin and its control over oil[J].Oil and Gas Geology,1999,20(4):344-348].
[8]张勇,赵密福,宋维琪.惠民凹陷临南斜坡带油气纵向运移及其控制因素[J].石油勘探与开发,2000,27(6):21-22.[ZHANG Yong,ZHAO Mifu,SONG Weiqi.Hydrocarbon vertical migra-tion andits controlling factors of Linnan slope belt in Hui min depression[J].Petroleum Exploration and Development,2000,27(6):21-22].
[9]陈庆春,林玉祥,唐洪三.临南地区石油运移方向与成藏期次研究[J].沉积学报,2001,19(4):611-616.[CHEN Qingchun,LI N Yuxiang,TANG Hongsan.Analysis of oil migration direc-tion and accumulation ti mein Linnan area[J].Acta Sedi mento-logica Sinica,2001,19(4):611-616].
[10]付金华.惠民凹陷夏口断裂带油气成藏机制研究[J].石油实验地质,2002,24(2):137-140.[FU Jinhua.Pool-forming mechanismof the Xiakou faulted zone in the Hui min Depres-sion[J].Petroleum Geology and Experi ment,2002,24(2):137-140].
[11]韩露,尉晓玮,张贵宾.有限元等数值模拟方法在我国岩石圈构造研究中的应用与发展[J].地球物理学进展,2004,19(4):953-960.[HAN Lu,WEI Xiaowei,ZHANG Guibin.Applica-tion and development of finite-element numerical modeling method in China lithosphere structure study[J].Progress in Geophysics,2004,19(4):953-960].
[12]李丕龙.陆相断陷盆地油气地质与勘探(卷一):陆相断陷盆地构造演化与构造样式[M].北京:石油工业出版社,地质出版社,2003.[LI Pilong.Petroleum Geology and Exploration of Continental Fault Basin(Vol.1):Tectonic Evolvement and Tectonic Patterns of Continental Fault Basin[M].Beijing:Pe-troleumIndustry Press,Geological Publishing House,2003].
[13]Zhao G C,Sun M,Wilde Si mon,et al.Late Archean to Paleo-proterozoic evolution of the North China Craton:key issues revisited[J].Precambrian Research,2005,136:177-202.
[14]徐义刚.华北岩石圈减薄的时空不均一特征[J].高校地质学报,2004,10(3):324-331.[XU Yigang.Lithospheric thinning beneath North China:Atemporal and spatial perspective[J].Geological Journal of China Universities,2004,10(3):324-331].
[15]林舸,赵崇斌,肖焕钦,等.华北克拉通构造活化的动力学机制与模型[J].大地构造与成矿学,2008,32(2):133-142.[LI N Ge,ZHAO Chongbin,XI AO Huanqin,et al.Dynamic mecha-nisms and models of tectonic activization in North China cra-ton[J].Geotectonica et Metallogenia,2008,32(2):133-142].
[16]赵密福,刘泽容,信荃麟,等.惠民凹陷临南地区断层活动特征及控油作用[J].石油勘探与开发,2000,27(6):9-11.[ZHAO Mifu,LI U Zerong,XI N Quanlin,et al.Fault activity features and its control over oil of Linnan area in Hui min depression[J].Petroleum Exploration and Development,2000,27(6):9-11].
[17]韩天佑,石颐.惠民凹陷临南地区新生代构造演化特征研究[J].东华理工大学学报,2004,27(4):309-314.[HAN Tiany-ou,SHI Yi.The characteristics of Neozoic structural evolve-ment of Linnan area in Hui min Sag[J].Journal of East China Institute of Technology,2004,27(4):309-314].
[18]Wilcox R E,Harding T P,Seely D R.Basin wrech tectonics[J].Bull.Am.Assoc.Petrol.Geol.,1973,57:74-96.
[19]侯青,赵健,回春,等.惠民凹陷构造应力场与油气运聚模拟分析[J].油气地质与采收率,2006,13(1):62-65.[HOU Qing,ZHAOJian,HUI Chun,et al.Si mulation analysis of the tec-tonic stress field and the oil-gas migration-accumulation in Hui min Sag[J].Petroleum Geology and Recovery Efficiency,2006,13(1):62-65].
[20]王伟锋,陆诗阔,金强.中国大陆东部盆地构造动力学分析[J].石油大学学报:自然科学版,1999,23(4):1-5.[WANG Weifeng,LU Shikuo,JI N Qiang.Geodynamic of sedi mentary basins in eastern China[J].Journal of the China University of Petroleum,1999,23(4):1-5].
[21]谢富仁,崔效锋,赵建涛,等.中国大陆及邻区现代构造应力场分区[J].地球物理学报,2004,47(4):654-662.[XIE Furen,CUI Xiaofeng,ZHAO Jiantao,et al.Regional division of the recent tectonic stress field in China and adjacent areas[J].Chinese Journal of Geophysics,2004,47(4):654-662].
[22]郭兴伟,施小斌,丘学林,等.渤海湾盆地新生代沉降特征及其动力学机制探讨[J].大地构造与成矿学,2007,31(3):273-280.[GUO Xingwei,SHI Xiaobin,QI U Xuelin,et al.Cenozoic subsidencein Bohai Bay Basin:Characteristics and dynamicha-nism[J].Geotectonica et Metallogenia,2007,31(3):273-280].
[23]漆家福,张一伟,陆克政,等.渤海湾盆地新生代构造演化[J].石油大学学报,1995,19(增刊):1-6.[QI Jiafu,ZHANG Yi-wei,LU Kezheng,et al.Cenozoic tectonic evolution in Bohai Bay Basin Province[J].Journal of the University of Petrole-um,China,1995,19(Supp.):1-6].
[24]万天丰,朱鸿,赵磊,等.郯庐断裂带的形成与演化:综述[J].现代地质,1996,10(2):159-168.[WAN Tianfeng,ZHU Hong,ZHAO Lei,et al.Formation and evolution of Tancheng-Lujiang fault zone:a review[J].Geoscience,1996,10(2):159-168].
[25]程捷,万天丰.郯庐断裂带在新生代的演化[J].地质科技情报,1996,15(3):35-42.[CHENG Jie,WAN Tianfeng.On the activity of the Tancheng-Lujiang fault zone during Cenozoic[J].Geological Science and Technology Information,1996,15(3):35-42].
[26]马杏垣,刘和甫,王维襄,等.中国东部中、新生代裂陷作用和伸展构造[J].地质学报,1983,57(1):22-42.[MA Xingyuan,LI U Hefu,WANG Weixiang,et al.Meso-Cenozoic taphroge-ny and extensional tectonics in eastern China[J].Acta Geo-logica Sinica,1983,57(1):22-42].
[27]吴智平,李伟,郑德顺,等.沾化凹陷中、新生代断裂发育及其形成机制分析[J].高校地质学报,2004,10(3):405-417.[WU Zhiping,LI Wei,ZHENG Deshun,et al.Analysis on features and origins of the Mesozoic and Cenozoic faults in Zhanhua Sag[J].Geological Journal of China Universities,2004,10(3):405-417].
[28]Nothrup C J,Royden L H,Burchfiel B C.Motion of the Pacif-ic plate relative to Eurasia and its potential relation to Ceno-zoic extension along the eastern margin of Eurasia[J].Geolo-gy,1995,23(8):719-722.
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