济阳坳陷青东凹陷构造格局及构造演化
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摘要
青东凹陷构造特征复杂,构造格局及构造演化过程不清,严重制约了该区石油地质条件研究的深入。综合钻井、地震资料对青东凹陷的边界类型及构造格局进行了分析,利用平衡剖面技术对其构造演化特征进行了研究。明确了青东凹陷是在郯庐断裂带控制下形成的新生代走滑拉分断陷盆地,具有"三断一超"的边界特征;凹陷内部断裂构造具有强烈的走滑特征,雁列式、花状构造发育;构造格局表现为南北向垒堑相间、东西向东断西超的箕状特征;凹陷新生代的构造演化经历初始裂陷、强烈断陷、继承发展、抬升剥蚀和整体拗陷5个阶段,其中强烈断陷阶段是青东凹陷的构造定型期,控制了凹陷的构造格局。
Qingdong sag,a sub-structural unit of Bohai Bay Basin,which is located adjacent to the west of Tan-Lu Fault,has highly complex structural characteristics due to its unique structural location.Without sufficient understanding of its structural characteristics and tectonic evolution,the analysis about its petroleum geological conditions can not meet the requirements of pe-troleum exploration.Applying all the wells and seismic data to analyze the boundary type and the structural framework and bal-anced section method for the study of tectonic evolution of Qingdong sag,thereafter,several new conclusions are proposed as fol-lows.Qingdong sag is a Cenozoic strike-slip and extensional rhombochasm with three fault boundary and one overlapped slop con-trolled by the Tan-Lu Fault's strike-slip motion;Qingdong sag has the internal structural frame of horst-graben interval change pattern in the SN direction and dustpan pattern in EW direction with Tan-Lu Fault boundary in east and slope boundary in west;it has lots of strike-slip structures,such as echelon and flower-like structures;the tectonic evolution of the Qingdong Cenozoic sag can be divided into five stages:the original rift phase,the graben fault basin stage,the inheritance and development stage,the up-lifting and denudation stage,and the Neogene-Quaternary depression basin stage.The framework of the sag is formed and main-tained during the graben fault basin stage.
Qingdong sag,a sub-structural unit of Bohai Bay Basin,which is located adjacent to the west of Tan-Lu Fault,has highly complex structural characteristics due to its unique structural location.Without sufficient understanding of its structural characteristics and tectonic evolution,the analysis about its petroleum geological conditions can not meet the requirements of pe-troleum exploration.Applying all the wells and seismic data to analyze the boundary type and the structural framework and bal-anced section method for the study of tectonic evolution of Qingdong sag,thereafter,several new conclusions are proposed as fol-lows.Qingdong sag is a Cenozoic strike-slip and extensional rhombochasm with three fault boundary and one overlapped slop con-trolled by the Tan-Lu Fault's strike-slip motion;Qingdong sag has the internal structural frame of horst-graben interval change pattern in the SN direction and dustpan pattern in EW direction with Tan-Lu Fault boundary in east and slope boundary in west;it has lots of strike-slip structures,such as echelon and flower-like structures;the tectonic evolution of the Qingdong Cenozoic sag can be divided into five stages:the original rift phase,the graben fault basin stage,the inheritance and development stage,the up-lifting and denudation stage,and the Neogene-Quaternary depression basin stage.The framework of the sag is formed and main-tained during the graben fault basin stage.
引文
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[4]李桂范,李建平,王根照,等.渤中坳陷青东凹陷古近系沙三下亚段构造—古地貌对沉积的控制[J].石油与天然气地质,2009,30(4):425-429.
[5]王亮,杜晓峰,张海霞,等.渤海南部海域青东凹陷油气成藏主控因素分析[J].石油地质与工程,2009,23(5):18-24.
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[7]向淑敏,李建平,王根照,等.青东凹陷古近系沙三段中亚段构造—古地貌对沉积的控制[J].大庆石油学院学报,2010,3(1):1-4.
[8]王会丽,王伟锋,王新.青东凹陷古近系地震相与沉积相初探[J].石油天然气学报(江汉石油学院学报),2009,31(5):250-254.
[9]张云银.郯庐断裂带构造特征及油气分布规律[J].油气地质与采收率,200,29(6):22-25.
[10]彭存仓,张博.郯庐中段走滑断裂与新滩地区油气成藏关系[J].石油实验地质,20093,1(3):227-230.
[11]孙和风,曾选萍,贺电波,等.莱州湾凹陷温压系统与油气成藏[J].油气地质与采收率,2010,17(1):19-21.
[12]侯贵廷,钱祥麟,蔡东升.渤海湾盆地中、新生代构造演化研究[J].北京大学学报:自然科学版,200,137(6):845-851.
[13]张克鑫,漆家福.潍北盆地新生代构造演化及其与郯庐断裂带的关系[J].石油天然气学报(江汉石油学院学报),2005,27(6):817-820.
[14]漆家福,邓荣敬,周心怀,等.渤海海域新生代盆地中的郯庐断裂带构造[J].中国科学:D辑地球科学,2008,38(增刊I):19-29.
[15]夏斌,刘朝露,陈根文,等.渤海湾盆地中新生代构造演化与构造样式[J].天然气工业,2006,26(12):57-60.
[16]杨超,陈清华.济阳坳陷构造演化及其构造层的划分[J].油气地质与采收率,2005,12(2):9-12.
[17]李伟,吴智平,侯旭波,等.平衡剖面技术在临清坳陷东部盆地分析中的应用[J].油气地质与采收率,2010,17(2):33-36,41.
①胡贤根,谭明友,张明振.济阳坳陷东部走滑构造形成机制.油气地球物理,2007,5(1):50-58.
[2]李春荣,辛仁臣,李建平,等.郯庐断裂对青东凹陷古近纪沉积体系的控制[J].新疆石油地质,2008,29(2):209-213.
[3]陈顺霞.青东凹陷沙河街组沉积特征及有利砂体预测[D].东营:中国石油大学(华东),2007.
[4]李桂范,李建平,王根照,等.渤中坳陷青东凹陷古近系沙三下亚段构造—古地貌对沉积的控制[J].石油与天然气地质,2009,30(4):425-429.
[5]王亮,杜晓峰,张海霞,等.渤海南部海域青东凹陷油气成藏主控因素分析[J].石油地质与工程,2009,23(5):18-24.
[6]时丕同,方旭庆,陈涛,等.青东凹陷石油地质特征和勘探方向分析[J].西南石油大学学报:自然科学版,2009,31(5):43-48.
[7]向淑敏,李建平,王根照,等.青东凹陷古近系沙三段中亚段构造—古地貌对沉积的控制[J].大庆石油学院学报,2010,3(1):1-4.
[8]王会丽,王伟锋,王新.青东凹陷古近系地震相与沉积相初探[J].石油天然气学报(江汉石油学院学报),2009,31(5):250-254.
[9]张云银.郯庐断裂带构造特征及油气分布规律[J].油气地质与采收率,200,29(6):22-25.
[10]彭存仓,张博.郯庐中段走滑断裂与新滩地区油气成藏关系[J].石油实验地质,20093,1(3):227-230.
[11]孙和风,曾选萍,贺电波,等.莱州湾凹陷温压系统与油气成藏[J].油气地质与采收率,2010,17(1):19-21.
[12]侯贵廷,钱祥麟,蔡东升.渤海湾盆地中、新生代构造演化研究[J].北京大学学报:自然科学版,200,137(6):845-851.
[13]张克鑫,漆家福.潍北盆地新生代构造演化及其与郯庐断裂带的关系[J].石油天然气学报(江汉石油学院学报),2005,27(6):817-820.
[14]漆家福,邓荣敬,周心怀,等.渤海海域新生代盆地中的郯庐断裂带构造[J].中国科学:D辑地球科学,2008,38(增刊I):19-29.
[15]夏斌,刘朝露,陈根文,等.渤海湾盆地中新生代构造演化与构造样式[J].天然气工业,2006,26(12):57-60.
[16]杨超,陈清华.济阳坳陷构造演化及其构造层的划分[J].油气地质与采收率,2005,12(2):9-12.
[17]李伟,吴智平,侯旭波,等.平衡剖面技术在临清坳陷东部盆地分析中的应用[J].油气地质与采收率,2010,17(2):33-36,41.
①胡贤根,谭明友,张明振.济阳坳陷东部走滑构造形成机制.油气地球物理,2007,5(1):50-58.
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