东濮凹陷濮城断展褶皱形成演化及与油气关系
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摘要
伸展盆地中的褶皱现象是普遍的,它们可形成重要的油气圈闭。本文根据地震资料研究了濮城构造的成因类型和演化。濮城构造为与深部断裂活动和沙三段盐层有关的褶皱构造,是典型的正断层断展褶皱。褶皱幅度和沉积厚度分析证明,该褶皱的主要发育期为沙二段和沙一段沉积期。濮城构造优越的构造位置、良好的封闭条件和匹配的构造形成时间与生排烃时间,决定了其优越的成油气藏条件,未来勘探应注意裂缝性油气藏的发现。
Folds are common in an extensional basin and they are important traps for oil and gas.This paper analyzes the genetic types and evolutions of the Pucheng structure based on seismic data.The Pucheng structure was a normal fault propagation fold related to deep fault activities and salt layers in the third member of Shahejie formation.The fold relief and sedimentary thicknesses indicate a fold forming time in the depositional time of the second and first members of Shahejie formation.The outstanding tectonic location,effective sealing conditions and the matching between structural formation and hydrocarbon generation and discharge indicate favorable reservoirs in the Pucheng structure.The future exploration should pay attention to fracture reservoirs.
Folds are common in an extensional basin and they are important traps for oil and gas.This paper analyzes the genetic types and evolutions of the Pucheng structure based on seismic data.The Pucheng structure was a normal fault propagation fold related to deep fault activities and salt layers in the third member of Shahejie formation.The fold relief and sedimentary thicknesses indicate a fold forming time in the depositional time of the second and first members of Shahejie formation.The outstanding tectonic location,effective sealing conditions and the matching between structural formation and hydrocarbon generation and discharge indicate favorable reservoirs in the Pucheng structure.The future exploration should pay attention to fracture reservoirs.
引文
[1]Hamblin W K.Origin of“Reverse Drag”on the downthrown Side of normal faults.Geological Society of America Bulletin,1965,76(10):1145-1164.
[2]Schlische R W.Geometry and origin of fault-related folds in extensional settings.AAPG Bulletin,1995,79(11):1661-1678.
[3]Janecke S U,Vanderburg C J,Blankenau J J.Geometry,mechanism,and significance of extensional folds from examples in the Rocky Mountain,Basin and Range Province,USA.Journal of Structural Geology,1998,20(7):841-856.
[4]李晓清,程有义,熊保贤等.正断层断面样式与上盘伴生褶皱及其油气勘探意义.石油地球物理勘探,2001,36(2):205-212.Li Xiaoqing,Cheng Youyi,Xiong Baoxian et al.Normal fault plane pattern and associated fold in upside and their meaning in oil-gas exploration.OGP,2001,36(2):205-212.
[5]Khalil S M and McClay K R.Extensional fault-related folding,northwestern Red Sea,Egypt.Journal of Structural Geology,2002,24(4):743-762.
[6]陈书平,漆家福,王德仁等.东濮凹陷断裂系统及变换构造.石油学报,2007,28(1):44-49.Chen Shuping,Qi Jiafu,Wang Deren et al.Fault systems and transfer structures in Dongpu Sag.Acta Petrolei Sinica,2007,28(1):44-49.
[7]Chen S P,Xu S S,Wang D R et al.Effect of block rotation on fault sealing:an example in Dongpu sag,Bohai Bay Basin,China.Marine and Petroleum Geology,2013,39:39-47.
[8]汪新文.伸展褶皱作用及其油气勘探意义.现代地质,2008,22(1):60-69.Wang Xinwen.Extensional folding and its significance for oil-gas exploration.Geoscience,2008,22(1):60-69.
[9]陈书平,汤良杰,漆家福等.盐在变形中的作用:库车坳陷与东濮坳陷盐构造对比研究.地质学报,2007,81(6):745-754.Chen Shuping,Tang Liangjie,Qi Jiafu et al.Roles of salt in deformation:Compression of the salt-related structures between Kuqa depression and Dongpu Depression.Acta Geologica Sinica,2007,81(6):745-754.
[10]Chen Shuping,Tan Yuming,Qi Jiafu et al.Chapter7,Cenozoic tectonic characteristics,evolution and geodynamics of Dongpu Sag,Bohai Bay basin,China.∥New Frontiers in Tectonic Research-General Problems,Sedimentary Basins and Island Arcs.InTech,Croaria,2011,143-168.
[11]Stearns D W.Faulting and forced folding in the Rocky Mountain foreland.Geological Society of America Memoir,1978,151:1-38.
[12]Withjack M O and Olson J.Experimental models of extensional forced folds.AAPG Bulletin,1990,74(7):1038-1054.
[13]Cosgrove J W and Ameen M S.A comparison of the geometry,spatial organization and fracture patterns associated with forced folds and buckle folds.∥Forced Folds and Fractures.London:The Geological Society,2000,223-250.
[2]Schlische R W.Geometry and origin of fault-related folds in extensional settings.AAPG Bulletin,1995,79(11):1661-1678.
[3]Janecke S U,Vanderburg C J,Blankenau J J.Geometry,mechanism,and significance of extensional folds from examples in the Rocky Mountain,Basin and Range Province,USA.Journal of Structural Geology,1998,20(7):841-856.
[4]李晓清,程有义,熊保贤等.正断层断面样式与上盘伴生褶皱及其油气勘探意义.石油地球物理勘探,2001,36(2):205-212.Li Xiaoqing,Cheng Youyi,Xiong Baoxian et al.Normal fault plane pattern and associated fold in upside and their meaning in oil-gas exploration.OGP,2001,36(2):205-212.
[5]Khalil S M and McClay K R.Extensional fault-related folding,northwestern Red Sea,Egypt.Journal of Structural Geology,2002,24(4):743-762.
[6]陈书平,漆家福,王德仁等.东濮凹陷断裂系统及变换构造.石油学报,2007,28(1):44-49.Chen Shuping,Qi Jiafu,Wang Deren et al.Fault systems and transfer structures in Dongpu Sag.Acta Petrolei Sinica,2007,28(1):44-49.
[7]Chen S P,Xu S S,Wang D R et al.Effect of block rotation on fault sealing:an example in Dongpu sag,Bohai Bay Basin,China.Marine and Petroleum Geology,2013,39:39-47.
[8]汪新文.伸展褶皱作用及其油气勘探意义.现代地质,2008,22(1):60-69.Wang Xinwen.Extensional folding and its significance for oil-gas exploration.Geoscience,2008,22(1):60-69.
[9]陈书平,汤良杰,漆家福等.盐在变形中的作用:库车坳陷与东濮坳陷盐构造对比研究.地质学报,2007,81(6):745-754.Chen Shuping,Tang Liangjie,Qi Jiafu et al.Roles of salt in deformation:Compression of the salt-related structures between Kuqa depression and Dongpu Depression.Acta Geologica Sinica,2007,81(6):745-754.
[10]Chen Shuping,Tan Yuming,Qi Jiafu et al.Chapter7,Cenozoic tectonic characteristics,evolution and geodynamics of Dongpu Sag,Bohai Bay basin,China.∥New Frontiers in Tectonic Research-General Problems,Sedimentary Basins and Island Arcs.InTech,Croaria,2011,143-168.
[11]Stearns D W.Faulting and forced folding in the Rocky Mountain foreland.Geological Society of America Memoir,1978,151:1-38.
[12]Withjack M O and Olson J.Experimental models of extensional forced folds.AAPG Bulletin,1990,74(7):1038-1054.
[13]Cosgrove J W and Ameen M S.A comparison of the geometry,spatial organization and fracture patterns associated with forced folds and buckle folds.∥Forced Folds and Fractures.London:The Geological Society,2000,223-250.
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