澳大利亚大澳湾盆地塞杜纳坳陷构造演化及构造特征分析
|
摘要
澳大利亚大澳湾盆地是目前世界上为数不多的低勘探程度大型沉积盆地,其中塞杜纳坳陷是近几年各大石油公司高度关注的区域。受地震资料品质的影响,前人对塞杜纳坳陷的地层结构、构造演化和构造样式方面的研究还不清楚。本文以重处理二维地震资料为基础,开展大面积的构造解释,通过"回剥法"平衡剖面恢复和重建了塞杜纳坳陷的构造演化历史,与其他类似构造和沉积背景的被动陆缘盆地类比确立了塞杜纳坳陷的双重重力滑脱构造模式。在对塞杜纳坳陷构造特征进行解析的基础上,结合对塞杜纳坳陷的构造差异性分析,总结出塞杜纳坳陷发育的3类共8种主要的圈闭类型,并指出有利圈闭类型发育带的分布,为下步勘探指明了方向。
The Bight Basin of Australia is one of the few large under-explored sedimentary basins in the world,and the Ceduna sub-basin of the Bight Basin has received high attention of oil companies in recent years.However,the stratigraphy,structural evolution and structure types of the sub-basin,constrained by the seismic data with low signal-to-noise ratio,remain unclear up to date.Based on the reprocessed 2d seismic data,regional seismic interpretation has been completed,on the basis of which,the structural evolution history of the Ceduna sub-basin was rebuilt using‘back-stripping'balanced sections.Duplex gravity driven decollement structure model was finally established on analogy and comparison with other passive margin basins having similar tectonic and depositional background.Further structural analysis of the Ceduna sub-basin was made to reveal the structure features.8types of structural traps under 3classes were generalized and the belt of favorable traps were found,which provide the clue for future exploration in the sub-basin.
The Bight Basin of Australia is one of the few large under-explored sedimentary basins in the world,and the Ceduna sub-basin of the Bight Basin has received high attention of oil companies in recent years.However,the stratigraphy,structural evolution and structure types of the sub-basin,constrained by the seismic data with low signal-to-noise ratio,remain unclear up to date.Based on the reprocessed 2d seismic data,regional seismic interpretation has been completed,on the basis of which,the structural evolution history of the Ceduna sub-basin was rebuilt using‘back-stripping'balanced sections.Duplex gravity driven decollement structure model was finally established on analogy and comparison with other passive margin basins having similar tectonic and depositional background.Further structural analysis of the Ceduna sub-basin was made to reveal the structure features.8types of structural traps under 3classes were generalized and the belt of favorable traps were found,which provide the clue for future exploration in the sub-basin.
引文
[1]Totterdell J M,Bradshaw B E.The structural framework and tectonic evolution of the Bight Basin[C]//PESA Eastern Australasian Basins Symposium II,2004:41-61.
[2]Norvick M S,Smith M A.Mapping the plate tectoic reconstruction of southern and southeastern Australia and implications for petroleum systems[J].Journal Australian Petroleum Production and Exploration Association,2001:15-35.
[3]Krassay A A,Totterdell J M.Seismic stratigraphy of a large Cretaceous shelf-margin delta complex offshore southern Australia[J].Bulletin American Association of Petroleum Geologists,2003,87(6):935-963.
[4]Totterdell J M,Blevin J E,Struckmeyer H I M,et al.A New sequence framework for the Great Australian Bight:Starting with a New Slate[J].The APPEA Journal,2000,40(1):95-117.
[5]Haq B U,Hardenbol J,Vail P R,Mesozoic and Cenozoic chronostratigraphy and eustatic cycles[J].Society of Economic Palaeontologists and Mineralogists,Special Publication 42,1988:71-108.
[6]Hegarty K A,Weissel J K,Mutter J C.Subsidence history of Australia's southern margin,constraints on basin models[J].Bulletin American Association of Petroleum Geologists,1988,72(5):615-633.
[7]Brown B J,Muller R D,Struckmeyer H I M.Anomalous tectonic subsidence of the southern Australian passive margin:response to cretaceous dynamic topography or differential lithospheric stretching?[C]//PESA Eastern Australian Basin Symposium.2001:563-567.
[8]邓荣敬,邓运华,于水,等.尼日尔三角洲盆地油气地质与成藏特征[J].石油勘探与开发,2008,6:755-762.[DENG Rongjing,DENG Yunhua,YU Shui,et al.Hydrocarbon geology and reservoir formation characteristics of Niger Delta Basin[J].Petroleum Exploration and Development,2008,35(6):755-762.]
[9]高印军,杨磊,韩文明,等.尼日尔三角洲泥底辟和泥火山的形成机理[J].新疆石油地质,2010,31(3):332-334.[GAO Yinjun,YANG Lei,HAN Wenming,et al.Formation mechanism of mud diaper and mud volcano in Niger delta[J].Xinjiang Petroleum Geology,2010,31(3):332-334.]
[10]侯高文,刘和甫,左胜杰.尼日尔三角洲盆地油气分布特征及控制因素[J].石油与天然气地质,2005,26(3):374-378.[HOU Gaowen,LIU Hefu,ZUO Shengjie.A study of distribution characteristics of petroleum in Niger delta and their controlling factors[J].Oil&Gas Geology,2005,26(3):374-378.]
[11]陈书平,王春修,肖华,等.尼日尔三角洲新生代褶皱作用及相关的油气圈闭[J].高校地质学报,2013,19(2):355-363.[CHEN Shuping,WANG Chunxiu,XIAO Hua,et al.Folding of the Niger delta in the Cenozoic and its related traps[J].Geological Journal of China Universities,2013,19(2):355-363.]
[12]李涛,胡望水,胡芳,等.里奥穆尼盆地重力滑脱构造发育特征及演化规律[J].石油天然气学报,2012,34(4):1-6.[LI Tao,HU Wangshui,HU Fang.Gravitational decollement structural development characteristics and its evolutionary history of Rio Muni Basin[J].Journal of Oil and Gas Technology,2012,34(4):1-6.]
[13]李涛,胡望水,于水,等.西非被动大陆边缘重力滑脱构造体系下的塑性构造[J].海洋地质与第四纪地质,2012,32(3):69-76.[LI Tao,HU Wangshui,YU Shui,et al.Ductile structures in gravitational decolloment structure system at passive continental margin of West African[J].Marine Geology and Quaternary Geology,2012,32(3):69-76.]
[2]Norvick M S,Smith M A.Mapping the plate tectoic reconstruction of southern and southeastern Australia and implications for petroleum systems[J].Journal Australian Petroleum Production and Exploration Association,2001:15-35.
[3]Krassay A A,Totterdell J M.Seismic stratigraphy of a large Cretaceous shelf-margin delta complex offshore southern Australia[J].Bulletin American Association of Petroleum Geologists,2003,87(6):935-963.
[4]Totterdell J M,Blevin J E,Struckmeyer H I M,et al.A New sequence framework for the Great Australian Bight:Starting with a New Slate[J].The APPEA Journal,2000,40(1):95-117.
[5]Haq B U,Hardenbol J,Vail P R,Mesozoic and Cenozoic chronostratigraphy and eustatic cycles[J].Society of Economic Palaeontologists and Mineralogists,Special Publication 42,1988:71-108.
[6]Hegarty K A,Weissel J K,Mutter J C.Subsidence history of Australia's southern margin,constraints on basin models[J].Bulletin American Association of Petroleum Geologists,1988,72(5):615-633.
[7]Brown B J,Muller R D,Struckmeyer H I M.Anomalous tectonic subsidence of the southern Australian passive margin:response to cretaceous dynamic topography or differential lithospheric stretching?[C]//PESA Eastern Australian Basin Symposium.2001:563-567.
[8]邓荣敬,邓运华,于水,等.尼日尔三角洲盆地油气地质与成藏特征[J].石油勘探与开发,2008,6:755-762.[DENG Rongjing,DENG Yunhua,YU Shui,et al.Hydrocarbon geology and reservoir formation characteristics of Niger Delta Basin[J].Petroleum Exploration and Development,2008,35(6):755-762.]
[9]高印军,杨磊,韩文明,等.尼日尔三角洲泥底辟和泥火山的形成机理[J].新疆石油地质,2010,31(3):332-334.[GAO Yinjun,YANG Lei,HAN Wenming,et al.Formation mechanism of mud diaper and mud volcano in Niger delta[J].Xinjiang Petroleum Geology,2010,31(3):332-334.]
[10]侯高文,刘和甫,左胜杰.尼日尔三角洲盆地油气分布特征及控制因素[J].石油与天然气地质,2005,26(3):374-378.[HOU Gaowen,LIU Hefu,ZUO Shengjie.A study of distribution characteristics of petroleum in Niger delta and their controlling factors[J].Oil&Gas Geology,2005,26(3):374-378.]
[11]陈书平,王春修,肖华,等.尼日尔三角洲新生代褶皱作用及相关的油气圈闭[J].高校地质学报,2013,19(2):355-363.[CHEN Shuping,WANG Chunxiu,XIAO Hua,et al.Folding of the Niger delta in the Cenozoic and its related traps[J].Geological Journal of China Universities,2013,19(2):355-363.]
[12]李涛,胡望水,胡芳,等.里奥穆尼盆地重力滑脱构造发育特征及演化规律[J].石油天然气学报,2012,34(4):1-6.[LI Tao,HU Wangshui,HU Fang.Gravitational decollement structural development characteristics and its evolutionary history of Rio Muni Basin[J].Journal of Oil and Gas Technology,2012,34(4):1-6.]
[13]李涛,胡望水,于水,等.西非被动大陆边缘重力滑脱构造体系下的塑性构造[J].海洋地质与第四纪地质,2012,32(3):69-76.[LI Tao,HU Wangshui,YU Shui,et al.Ductile structures in gravitational decolloment structure system at passive continental margin of West African[J].Marine Geology and Quaternary Geology,2012,32(3):69-76.]