青东凹陷古近纪构造演化与盆地转型
|
摘要
通过对三维地震、钻井岩心及录测井资料的详细分析解释,发现青东凹陷古近纪不同演化阶段的构造特征存在着差异性:孔店期-沙四早期青东凹陷以NW向断层控盆为主,整体断层数量较少,但规模较大;沙四晚期断层数量明显增多,各个方向控盆断层均有发育,NW向的青东12断层消亡,主要以NWW和近EW向断层活动为主;沙三-沙二期控盆断层走向主要为NE和NEE向。这种构造格局的转变导致了相应的盆地转型,青东凹陷孔店期表现为受郯庐断裂带左旋走滑应力场控制之下的一系列北东断南西超的北西向半地堑,地层沉积厚度大;沙四期青东凹陷表现为NWW与近EW向兼有的复合盆地格局,为盆地转型阶段;沙三期、沙二期受郯庐断裂带右旋走滑应力场的影响,盆地格局完全转为近EW和NE(E)向,开始发育北断南超的半地堑和双断式堑垒构造。
Based on the three dimensional seismic, drilling, and core data, the structural features of the Qingdong sag is analyzed. The results show that the structure features varied for each evolution stage of Paleogene. The basin is mainly controlled by the NW-trending faults from the deposit stage of Kongdian Formation to the later deposit stage of the 4th member of Shahejie Formation, however, the faults were scarce but large. The number of faults increased significantly in the early deposit stage of the 4th member of Shahejie Formation, then the basin controlling faults of every direction developed, but the Qingdong 12 fault of NW direction disappeared, while the active faults were mainly NWW and EW trending. The basin controlling faults mainly trended to NE and NEE in the deposit stage of the 2nd and 3rd member of Shahejie Formation. So, the evolution of the structure pattern led to the transformation of the basin. The sag was made up of NW-trending half-garbens with faulting in northwest and overlapping in southeast in the deposit stage of Kongdian Formation, and was controlled by sinistral strike-slip stress field of the Tanlu fault zone which resulted in thick sedimentary strata. During the deposit of the 4th member of Shahejie Formation, the sag was at a transitional period being characterized by composite basin pattern with NWW and EW-trending . Under the influence of dextral strike-slip stress of the Tanlu fault zone, the basin pattern transformed to be mainly EW and NE trending, and began the development of the half-garbens with faulting in north and overlapping in south and graben-horsts.
Based on the three dimensional seismic, drilling, and core data, the structural features of the Qingdong sag is analyzed. The results show that the structure features varied for each evolution stage of Paleogene. The basin is mainly controlled by the NW-trending faults from the deposit stage of Kongdian Formation to the later deposit stage of the 4th member of Shahejie Formation, however, the faults were scarce but large. The number of faults increased significantly in the early deposit stage of the 4th member of Shahejie Formation, then the basin controlling faults of every direction developed, but the Qingdong 12 fault of NW direction disappeared, while the active faults were mainly NWW and EW trending. The basin controlling faults mainly trended to NE and NEE in the deposit stage of the 2nd and 3rd member of Shahejie Formation. So, the evolution of the structure pattern led to the transformation of the basin. The sag was made up of NW-trending half-garbens with faulting in northwest and overlapping in southeast in the deposit stage of Kongdian Formation, and was controlled by sinistral strike-slip stress field of the Tanlu fault zone which resulted in thick sedimentary strata. During the deposit of the 4th member of Shahejie Formation, the sag was at a transitional period being characterized by composite basin pattern with NWW and EW-trending . Under the influence of dextral strike-slip stress of the Tanlu fault zone, the basin pattern transformed to be mainly EW and NE trending, and began the development of the half-garbens with faulting in north and overlapping in south and graben-horsts.
引文
贾红义,杨长春,于建国,王金铎.2007.济阳坳陷东营凹陷早始新世构造体制转换与油气成藏.地球物理学进展,22(4):1312-1319.
李春荣,辛仁臣,李建平,刘豪.2008.郯庐断裂对青东凹陷古近纪沉积体系的控制.新疆石油地质,29(2):209-213.
李鹏举,卢华复,施央申.1995.渤海湾盆地东濮凹陷的形成及断裂构造研究.南京大学学报,31(1):128-139.
李伟,吴智平,张明华,郑德顺,周瑶琪.2006.埕岛地区中生代和新生代断层发育特征及其对沉积的控制作用.中国石油大学学报(自然科学版),30(1):1-6.
彭文绪,张如才,孙和风,史浩,吴奎,贺电波,姚以泰.2010.古新世以来郯庐断裂带的位移量及其对莱州湾凹陷的控制.大地构造与成矿学,34(4):585-592.
任建业.2009.渤海湾盆地东营凹陷S6'界面的构造变革意义.地球科学,29(1):69-76.
任建业,李思田.2000.西太平洋边缘海盆地的扩张过程和动力学背景.地学前缘,7(3):203-213.
吴智平,李伟,郑德顺,吕洪波.2004.沾化凹陷中、新生代断裂发育及其形成机制分析.高校地质学报,10(3):405-417.
许浚远,张凌云.1999.欧亚板块东缘新生代盆地成因:右行剪切拉分作用.石油与天然气地质,20(3):187-191.
俞家声,王普伟,林玉祥.2001.青东凹陷油气资源潜力.油气地质与采收率,(1):5-8.
张升平,吕宝凤,夏斌,刘冠德.2007.东营凹陷新生代构造转型及其控油意义.大地构造与成矿学,31(3):281-287.
Engebretson D C,Cox A and Gordon R G..1985.Relative mo-tions between oceanic and continental plates in the Pacificbasin.Geological Society of America,Special Paper,206:1-59.
Maruyama S,Isozaki Y,Kimura G and Terabayashi M.1997.Paleogeographic maps of the Japanese Islands:Plate tecton-ic systhesis from750Ma to the present.Island Arc,6(1):121-142.
Northrup C J,Royden L H and Burchfiel B C.1995.Motion ofthe Pacific plate relative Lo Eurasia and its potential rela-tion to Cenozoic extension along the eastern margin of Eura-sia.Geology,23(8):719-722.
李春荣,辛仁臣,李建平,刘豪.2008.郯庐断裂对青东凹陷古近纪沉积体系的控制.新疆石油地质,29(2):209-213.
李鹏举,卢华复,施央申.1995.渤海湾盆地东濮凹陷的形成及断裂构造研究.南京大学学报,31(1):128-139.
李伟,吴智平,张明华,郑德顺,周瑶琪.2006.埕岛地区中生代和新生代断层发育特征及其对沉积的控制作用.中国石油大学学报(自然科学版),30(1):1-6.
彭文绪,张如才,孙和风,史浩,吴奎,贺电波,姚以泰.2010.古新世以来郯庐断裂带的位移量及其对莱州湾凹陷的控制.大地构造与成矿学,34(4):585-592.
任建业.2009.渤海湾盆地东营凹陷S6'界面的构造变革意义.地球科学,29(1):69-76.
任建业,李思田.2000.西太平洋边缘海盆地的扩张过程和动力学背景.地学前缘,7(3):203-213.
吴智平,李伟,郑德顺,吕洪波.2004.沾化凹陷中、新生代断裂发育及其形成机制分析.高校地质学报,10(3):405-417.
许浚远,张凌云.1999.欧亚板块东缘新生代盆地成因:右行剪切拉分作用.石油与天然气地质,20(3):187-191.
俞家声,王普伟,林玉祥.2001.青东凹陷油气资源潜力.油气地质与采收率,(1):5-8.
张升平,吕宝凤,夏斌,刘冠德.2007.东营凹陷新生代构造转型及其控油意义.大地构造与成矿学,31(3):281-287.
Engebretson D C,Cox A and Gordon R G..1985.Relative mo-tions between oceanic and continental plates in the Pacificbasin.Geological Society of America,Special Paper,206:1-59.
Maruyama S,Isozaki Y,Kimura G and Terabayashi M.1997.Paleogeographic maps of the Japanese Islands:Plate tecton-ic systhesis from750Ma to the present.Island Arc,6(1):121-142.
Northrup C J,Royden L H and Burchfiel B C.1995.Motion ofthe Pacific plate relative Lo Eurasia and its potential rela-tion to Cenozoic extension along the eastern margin of Eura-sia.Geology,23(8):719-722.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心