西湖凹陷反转构造定量运动学过程及对油气的控制作用
|
摘要
基于较密集分布的2D地震资料和少量钻井资料,利用平衡剖面模拟方法对发育在西湖凹陷的反转构造进行了定量运动学过程和参数的模拟与分析。结果表明,西湖凹陷自中生代以来主要经历了2次挤压反转构造作用,分别发生在早中新世的龙井组沉积时期(距今23.3~16.3Ma)和晚中新世的柳浪组沉积时期(距今10.4~5.2Ma),造成了盆地北西—南东方向分别缩短0.61km和1.69km。其中主要的反转作用发育在柳浪组沉积时期,不但使中生代以来的地层全部卷入其中,形成了中央反转构造带,而且还造成了盆地北部和南部平均约911.6m和226.7m厚的地层剥蚀、以及1.46%和1.18%的盆地缩短率,北部反转强度明显大于南部。在中央反转构造带的南部区域,由于反转作用强化了部分背斜,形成了较理想的圈闭构造,为油气的聚集提供了有利条件,成为盆地重要的油气聚集带。
Based on a large number of data from 2D reflection seismic and some wells,the kinematical processes of inversion structure in Xihu Depression were analyzed,and some parameters were calculated using the balanced cross-section technology.The results showed that two periods of tectonic inversion occurred respectively in the early Miocene Longjing Formation(from 23.3 Ma to 16.3 Ma before present) and in the late Miocene Liulang Formation(from 10.4Ma to 5.2 Ma before present).The tectonic inversions made the basin shortened by 0.61 km and 1.69 km in the northwest-southeast direction.The major reversion activities were concentrated in the late Miocene Liulang Formation,which resulted in the central inversion belt with all the Mesozoic strata involved and also resulted in about 911.6 m of erosion thickness and 1.46% of the crustal shortening rate in the north part of the basin,while resulted in erosion thickness of 226.7 m and the crustal shortening rate of 1.18% in the south part.The analysis on the relationship between sag inversion and hydrocarbon accumulation showed that some ideal traps were formed in the southern area of the central inversion belt.The inversion strengthened the formation of anticlines and provided good conditions for hydrocarbon accumulation.Xihu Depression is the important hydrocarbon accumulation zone of the East China Sea Basin.
Based on a large number of data from 2D reflection seismic and some wells,the kinematical processes of inversion structure in Xihu Depression were analyzed,and some parameters were calculated using the balanced cross-section technology.The results showed that two periods of tectonic inversion occurred respectively in the early Miocene Longjing Formation(from 23.3 Ma to 16.3 Ma before present) and in the late Miocene Liulang Formation(from 10.4Ma to 5.2 Ma before present).The tectonic inversions made the basin shortened by 0.61 km and 1.69 km in the northwest-southeast direction.The major reversion activities were concentrated in the late Miocene Liulang Formation,which resulted in the central inversion belt with all the Mesozoic strata involved and also resulted in about 911.6 m of erosion thickness and 1.46% of the crustal shortening rate in the north part of the basin,while resulted in erosion thickness of 226.7 m and the crustal shortening rate of 1.18% in the south part.The analysis on the relationship between sag inversion and hydrocarbon accumulation showed that some ideal traps were formed in the southern area of the central inversion belt.The inversion strengthened the formation of anticlines and provided good conditions for hydrocarbon accumulation.Xihu Depression is the important hydrocarbon accumulation zone of the East China Sea Basin.
引文
[1]Turner J P,Williams G A.Sedimentary basin inversion and intra-plateshortening[J].Earth-Science Reviews,2004,5(3/4):277-304.
[2]Brun J P,Nalpas T.Graben inversion in nature and experiments[J].Tectonics,1996,15(3):677-687.
[3]Kossow D,Krawczyk C M.Structure and quantification of processescontrolling the evolution of the inverted NE-German basin[J].Marineand Petroleum Geology,2002,19(5):601-618.
[4]李上卿.东海西湖凹陷新时代地质构造特征与演化[J].海洋石油,2000,104(2):8-14.Li Shangqing.Cenozoic basin geological tectonic feature and evo-lution in Xihu Trough,the East China Sea[J].Offshore Oil,2000,104(2):8-14.
[5]何将启,杨风丽.东海西湖凹陷新时代盆地原型分析[J].海洋石油,2003,23(增刊):13-20.He Jiangqi,Yang Fengli.Prototype basin analysis in Cenozoic forXihu Sag,East China Sea[J].Offshore Oil,2003,23(Supple-ment):13-20.
[6]赵金海.东海中、新生代盆地成因机制和演化(上)[J].海洋石油,2004,24(4):6-14.Zhao Jinhai.The forming factors and evolvement of the Mesozoicand Cenozoic basin in the East China Sea[J].Offshore Oil,2004,24(4):6-14.
[7]李家彪.东海区域地质[M].北京:海洋出版社,2008:452-520.Li Jiabiao.Regional geology in East China Sea[M].Beijing:Ocean Press,2008:452-520.
[8]Wang G M,Coward M P,Yuan W,et al.Fold growth duringbasin inversion:example from the East China Sea Basin[G]//Buchanan J G,Buchanan P G.Basin inversion.London:GeologicalSociety of London,Special Publication No.88,1995:493-522.
[9]刘景彦,林畅松,姜亮,等.东海西湖凹陷第三系反转构造及其对油气聚集的影响[J].地球学报,2000,21(4):350-355.Liu Jingyan,Lin Changsong,Jiang Liang,et al.Characteristics ofTertiary inversion structures and their influence on oil&gas ac-cumulation in Xihu Trough,East China Sea[J].Acta GeoscientiaSinica,2000,21(4):350-355.
[10]陈志勇,葛和平.西湖凹陷反转构造与油气聚集[J].中国海上油气(地质),2003,17(1):20-24.Chen Zhiyong,Ge Heping.Inversion structures and hydrocarbonaccumulation in Xihu Sag,East China Sea Basin[J].China Off-shore Oil and Gas(Geology),2003,17(1):20-24.
[11]张敏强,钟志洪,夏斌,等.东海西湖凹陷中南部晚中新世构造反转与油气运聚[J].中国海上油气,2005,17(2):73-79.Zhang Minqiang,Zhong Zhihong,Xia Bin,et al.Late Miocenetectonic inversion and hydrocarbon migration and accumulationin central and southern Xihu sag,East China Sea[J].China Off-shore Oil and Gas,2005,17(2):73-79.
[12]Yang S H,Hu S B,Cai D S,et al.Present-day heat flow,thermalhistory and tectonic subsidence of the East China Sea Basin[J].Marine and Petroleum Geology,2004,21(9):1095-1105.
[13]尚可耘,贾健谊,周祖翼,等.利用声波测井数据估算西湖凹陷地层剥蚀量[J].海洋石油,2001,109:12-15.Shang Keyun,Jia Jianyi,Zhou Zuyi,et al.Quantitative estimationof erosion for Xihu depression:Sonic velocity analysis[J].Off-shore Oil,2001,109:12-15.
[14]Li Chunfeng,Zhou Zuyi,Ge Heping,et al.Correlations betweenerosions and relative uplifts from the central inversion zone of theXihu depression,East China Sea Basin[J].Terr.Atmos.Ocean.Sci.,2007,18(4):757-776.
[15]周祖翼,杨凤丽,贾健谊,等.东海西湖凹陷反转构造定量研究:来自裂变径迹分析数据的约束[J].海洋地质与第四纪地质,2002,22(1):63-67.Zhou Zuyi,Yang Fengli,Jia Jianyi,et al.Quantitative study oninversion structures in Xihu depression,East China Sea con-straints from fission track analysis Data[J].Marine Geology&Quaternary Geology,2002,22(1):63-67.
[2]Brun J P,Nalpas T.Graben inversion in nature and experiments[J].Tectonics,1996,15(3):677-687.
[3]Kossow D,Krawczyk C M.Structure and quantification of processescontrolling the evolution of the inverted NE-German basin[J].Marineand Petroleum Geology,2002,19(5):601-618.
[4]李上卿.东海西湖凹陷新时代地质构造特征与演化[J].海洋石油,2000,104(2):8-14.Li Shangqing.Cenozoic basin geological tectonic feature and evo-lution in Xihu Trough,the East China Sea[J].Offshore Oil,2000,104(2):8-14.
[5]何将启,杨风丽.东海西湖凹陷新时代盆地原型分析[J].海洋石油,2003,23(增刊):13-20.He Jiangqi,Yang Fengli.Prototype basin analysis in Cenozoic forXihu Sag,East China Sea[J].Offshore Oil,2003,23(Supple-ment):13-20.
[6]赵金海.东海中、新生代盆地成因机制和演化(上)[J].海洋石油,2004,24(4):6-14.Zhao Jinhai.The forming factors and evolvement of the Mesozoicand Cenozoic basin in the East China Sea[J].Offshore Oil,2004,24(4):6-14.
[7]李家彪.东海区域地质[M].北京:海洋出版社,2008:452-520.Li Jiabiao.Regional geology in East China Sea[M].Beijing:Ocean Press,2008:452-520.
[8]Wang G M,Coward M P,Yuan W,et al.Fold growth duringbasin inversion:example from the East China Sea Basin[G]//Buchanan J G,Buchanan P G.Basin inversion.London:GeologicalSociety of London,Special Publication No.88,1995:493-522.
[9]刘景彦,林畅松,姜亮,等.东海西湖凹陷第三系反转构造及其对油气聚集的影响[J].地球学报,2000,21(4):350-355.Liu Jingyan,Lin Changsong,Jiang Liang,et al.Characteristics ofTertiary inversion structures and their influence on oil&gas ac-cumulation in Xihu Trough,East China Sea[J].Acta GeoscientiaSinica,2000,21(4):350-355.
[10]陈志勇,葛和平.西湖凹陷反转构造与油气聚集[J].中国海上油气(地质),2003,17(1):20-24.Chen Zhiyong,Ge Heping.Inversion structures and hydrocarbonaccumulation in Xihu Sag,East China Sea Basin[J].China Off-shore Oil and Gas(Geology),2003,17(1):20-24.
[11]张敏强,钟志洪,夏斌,等.东海西湖凹陷中南部晚中新世构造反转与油气运聚[J].中国海上油气,2005,17(2):73-79.Zhang Minqiang,Zhong Zhihong,Xia Bin,et al.Late Miocenetectonic inversion and hydrocarbon migration and accumulationin central and southern Xihu sag,East China Sea[J].China Off-shore Oil and Gas,2005,17(2):73-79.
[12]Yang S H,Hu S B,Cai D S,et al.Present-day heat flow,thermalhistory and tectonic subsidence of the East China Sea Basin[J].Marine and Petroleum Geology,2004,21(9):1095-1105.
[13]尚可耘,贾健谊,周祖翼,等.利用声波测井数据估算西湖凹陷地层剥蚀量[J].海洋石油,2001,109:12-15.Shang Keyun,Jia Jianyi,Zhou Zuyi,et al.Quantitative estimationof erosion for Xihu depression:Sonic velocity analysis[J].Off-shore Oil,2001,109:12-15.
[14]Li Chunfeng,Zhou Zuyi,Ge Heping,et al.Correlations betweenerosions and relative uplifts from the central inversion zone of theXihu depression,East China Sea Basin[J].Terr.Atmos.Ocean.Sci.,2007,18(4):757-776.
[15]周祖翼,杨凤丽,贾健谊,等.东海西湖凹陷反转构造定量研究:来自裂变径迹分析数据的约束[J].海洋地质与第四纪地质,2002,22(1):63-67.Zhou Zuyi,Yang Fengli,Jia Jianyi,et al.Quantitative study oninversion structures in Xihu depression,East China Sea con-straints from fission track analysis Data[J].Marine Geology&Quaternary Geology,2002,22(1):63-67.
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