渤海辽东湾海域JZ25-1S转换带与油气成藏的关系
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摘要
根据新的三维地震资料解释结果,运用断层的位移-距离分析法,探讨了渤海辽东湾JZ25-1S转换带的变形特征,并分析了转换带与油气聚集的关系。JZ25-1S地区断裂发育,主要为北东走向,平面上呈雁列式排列。倾向相同的辽西1号断层、2号断层和3号断层在叠覆区形成了属于转换斜坡型的JZ25-1S构造转换带,并在斜坡背景上发育有断块构造。JZ25-1S转换带等变形体变换了辽西1号、辽西2号和辽西3号分段断层传递的应力,使断块体在三维空间上保持应变守衡。JZ25-1S转换带对油气聚集成藏的作用主要包括:有利于构造圈闭的形成;控制沉积体系展布;有利于油气运移和改善储层质量。渤海地区同向叠覆型正断层之间发育的转换带是值得探索的有利油气勘探领域。
Based on the 3D seismic profiles and displacement-distance scaling,the relationship between JZ25-1S transfer zone and hydrocarbon accumulation was analyzed in Liaodongwan offshore of Bohai Bay Basin.There are numerous faults of varying scales in JZ25-1S area,and the NE-trending faults are predominant.JZ25-1S transfer zone is located at the three echelon overstepping faults with the NW-dipping,including Liaoxi-1 fault,Liaoxi-2 fault and Liaoxi-3 fault.According to the features of the faults and their assemblages,the JZ25-1S transfer zone was classified into the relay ramp,where fault blocks were formed.The displacement-distance analysis showed that the displacement transfer and strain conservation of the three segmented faults were accomplished mainly in JZ25-1S transfer zone.JZ25-1S transfer zone had also important influence on the formation of the structural traps,spatial distribution of sedimentary systems and hydrocarbon migration,as well as the reservoir properties in the study area.The transfer zones in the overstepping normal faults with the same dip are the favorable objectives for oil and gas exploration in the offshore part of Bohai Bay Basin.
Based on the 3D seismic profiles and displacement-distance scaling,the relationship between JZ25-1S transfer zone and hydrocarbon accumulation was analyzed in Liaodongwan offshore of Bohai Bay Basin.There are numerous faults of varying scales in JZ25-1S area,and the NE-trending faults are predominant.JZ25-1S transfer zone is located at the three echelon overstepping faults with the NW-dipping,including Liaoxi-1 fault,Liaoxi-2 fault and Liaoxi-3 fault.According to the features of the faults and their assemblages,the JZ25-1S transfer zone was classified into the relay ramp,where fault blocks were formed.The displacement-distance analysis showed that the displacement transfer and strain conservation of the three segmented faults were accomplished mainly in JZ25-1S transfer zone.JZ25-1S transfer zone had also important influence on the formation of the structural traps,spatial distribution of sedimentary systems and hydrocarbon migration,as well as the reservoir properties in the study area.The transfer zones in the overstepping normal faults with the same dip are the favorable objectives for oil and gas exploration in the offshore part of Bohai Bay Basin.
引文
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[16]陈斌,邓运华,郝芳,等.黄河口凹陷BZ34断裂带油气晚期快速成藏模式[J].石油学报,2006,27(1):37-41.Chen Bin,Deng Yunhua,Hao Fang,et al.Late-stage rapid petro-leum accumulation model of BZ34fault zone in Huanghekou Sag[J].Acta Petrolei Sinica,2006,27(1):37-41.
[17]龚再升,蔡东升,张功成.郯庐断裂对渤海海域东部油气成藏的控制作用[J].石油学报,2007,28(4):1-10.Gong Zaisheng,Cai Dongsheng,Zhang Gongcheng.Dominatingaction of Tanlu Fault on hydrocarbon accumulation in easternBohai Sea area[J].Acta Petrolei Sinica,2007,28(4):1-10.
[18]McClay K R,White M J.Analogue modelling of orthogonal andoblique rifting[J].Marine and Petroleum Geology,1995,12(2):137-151.
[19]徐长贵,赖维成.渤海古近系中深层储层预测技术及其应用[J].中国海上油气,2005,17(4):231-236.Xu Changgui,Lai Weicheng.Predication technologies of Paleo-gene mid-deep reservoir and their application in Bohai Sea[J].China Offshore Oil and Gas,2005,17(4):231-236.
[2]Morley C K,Nelson R A,Patton T L,et al.Transfer zones in theEast African rift system and their relevance to hydrocarbon ex-ploration in rifts[J].AAPG Bulletin,1990,74(8):1234-1253.
[3]Faulds J E,VargaR J.The role of accommondation zone andtransfer zone in the regional segmentation of extended terranes[G]∥Faulds J E,Stewart J H.Accommodation zones and trans-fer zones:The regional segmentation of the basin and range prov-inces.Boulder:The Geological Society of America,1998:1-45.
[4]Peacock D C P,Sanderson D J.Geometry and development of re-lay ramps in normal fault systems[J].AAPG Bulletin,1994,78(2):147-165.
[5]Peacock D C P,Sanderson D J.Strike-slip relay ramps[J].Jour-nal of Structural Geology,1995,17(10):1351-1360.
[6]Mouslopoulou V,Nicol A,Little T A,et al.Displacement trans-fer between intersecting regional strike-slip and extensional faultsystems[J].Journal of Structural Geology,2007,29(1):100-116.
[7]Moustafa A R.Controls on the geometry of transfer zones in theSuez Rift and Northwest Red Sea:Implications for the structuralgeometry of rift systems[J].AAPG Bulletin,2002,86(6):979-1002.
[8]Acocella V,Morvillo P,Funiciello R.What controls relay rampsand transfer faults within rift zones?Insights from analoguemodels[J].Journal of Structural Geology,2005,27(3):397-408.
[9]Konstantinovskaya E A,Harris L B,Poulin J,et al.Transferzones and fault reactivation in inverted rift basins:Insights fromphysical modelling[J].Tectonophysics,2007,441(1/4):1-26.
[10]Morley C K.Developments in the structural geology of rifts overthe last decade and their impact on hydrocarbon exploration[G]∥Lambiase J J.Hydrocarbon habitat in rift basins.London:TheGeological Society,1995:1-32.
[11]胡望水,王燮培.松辽盆地北部变换构造及其石油地质意义[J].石油与天然气地质,1994,15(2):164-172.Hu Wangshui,Wang Xiepei.Transform structures in northernpart of Songliao Basin and its significance in petroleum geology[J].Oil&Gas Geology,1994,15(2):164-172.
[12]周建生,杨池银,陈发景,等.黄骅坳陷横向变换带的构造特征及成因[J].现代地质,1997,11(4):425-433.Zhou Jiansheng,Yang Chiyin,Chen Fajing,et al.Structural char-acteristics and origin of transverse transfer zone in HuanghuaSubbasin[J].Geoscience,1997,11(4):425-433.
[13]邬光辉,漆家福.黄骅盆地一级构造变换带的特征与成因[J].石油与天然气地质,1999,20(2):125-128.Wu Guanghui,Qi Jiafu.Characteristics and origin of first ordertransfer zones in Huanghua Basin[J].Oil&Gas Geology,1999,20(2):125-128.
[14]邬光辉,李启明,张宝收,等.塔中Ⅰ号断裂坡折带构造特征及勘探领域[J].石油学报,2005,26(1):27-30.Wu Guanghui,Li Qiming,Zhang Baoshou,et al.Structural char-acteristics and exploration fields of No.1faulted slope break inTazhong area[J].Acta Petrolei Sinica,2005,26(1):27-30.
[15]陈书平,漆家福,王德仁,等.东濮凹陷断裂系统及变换构造[J].石油学报,2007,28(1):43-49.Chen Shuping,Qi Jiafu,Wang Deren,et al.Fault systems andtransfer structures in Dongpu Sag[J].Acta Petrolei Sinica,2007,28(1):43-49.
[16]陈斌,邓运华,郝芳,等.黄河口凹陷BZ34断裂带油气晚期快速成藏模式[J].石油学报,2006,27(1):37-41.Chen Bin,Deng Yunhua,Hao Fang,et al.Late-stage rapid petro-leum accumulation model of BZ34fault zone in Huanghekou Sag[J].Acta Petrolei Sinica,2006,27(1):37-41.
[17]龚再升,蔡东升,张功成.郯庐断裂对渤海海域东部油气成藏的控制作用[J].石油学报,2007,28(4):1-10.Gong Zaisheng,Cai Dongsheng,Zhang Gongcheng.Dominatingaction of Tanlu Fault on hydrocarbon accumulation in easternBohai Sea area[J].Acta Petrolei Sinica,2007,28(4):1-10.
[18]McClay K R,White M J.Analogue modelling of orthogonal andoblique rifting[J].Marine and Petroleum Geology,1995,12(2):137-151.
[19]徐长贵,赖维成.渤海古近系中深层储层预测技术及其应用[J].中国海上油气,2005,17(4):231-236.Xu Changgui,Lai Weicheng.Predication technologies of Paleo-gene mid-deep reservoir and their application in Bohai Sea[J].China Offshore Oil and Gas,2005,17(4):231-236.
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