东濮凹陷古近纪断层活动性对洼陷演化及生烃的影响
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摘要
为明确东濮凹陷古近纪断层活动性对研究区不同沉积时期的洼陷形态、特征及沉积-沉降中心迁移规律的控制作用,利用地震、钻井、测井及重磁等资料对东濮凹陷进行构造解析。结果表明:研究区在沙四段上亚段沉积时期为统一广盆;在沙三段下亚段沉积时期断陷强烈,导致洼陷出现分隔性;在沙三段中亚段1—4砂组沉积时期,形成多断多凸多洼构造格局;沙二段沉积时期以后,早期产生的二级和三级断层的活动性逐渐减弱或消失,大量的三级和四级断层产生,多断多凸多洼构造格局更加明显。由于地壳重力均衡沉降作用,导致东濮凹陷地层分布发生跷跷板式分异,与断层活动性共同控制洼陷的演化。东濮凹陷古近纪发育的控洼断层的活动性控制洼陷的演化和烃源岩分布,断层的产状控制洼陷形态和干酪根类型。
In order to clarify the control of Paleogene faulting on subsag morphology,features and migration of sedimentation-subsidence center in different sedimentary period in Dongpu Sag,the structure of Dongpu Sag was interpreted and analyzed using the seismic data,drilling,logging data and heavy magnetic data. The results show that it is a universal basin in the sediment of the fourth member of Shahejie Formation in Dongpu Sag. Then the intense fault movement resulted in the division of sag during the sedimentation of the lower third member of Shahejie Formation. A framework characterized of multifaults,multiuplifts and multisubsags formed during the sedimentation of 1-4 sand group in the middle third member of Shahejie Formation. The activity of the second-level and the third-level faults formed in the early stage were gradually weakened or stopped after the sedimentation of the second member of Shahejie Formaiton. Large numbers of third-level and the fourth-level faults formed,and the framework characterized of multifaults-multiuplifts-multisubsags became more obvious. The equilibrium crustal gravity subsidence resulted in the seesaw-type differentiation of the strata and controlled the evolution of subsags combined with the fault activity. The Paleogene fault activity controlled the subsag evolution and the distribution of hydrocarbon source rocks in Dongpu Sag,and the occurrence of the fault controlled the morphology of subsag and the type of kerogen.
In order to clarify the control of Paleogene faulting on subsag morphology,features and migration of sedimentation-subsidence center in different sedimentary period in Dongpu Sag,the structure of Dongpu Sag was interpreted and analyzed using the seismic data,drilling,logging data and heavy magnetic data. The results show that it is a universal basin in the sediment of the fourth member of Shahejie Formation in Dongpu Sag. Then the intense fault movement resulted in the division of sag during the sedimentation of the lower third member of Shahejie Formation. A framework characterized of multifaults,multiuplifts and multisubsags formed during the sedimentation of 1-4 sand group in the middle third member of Shahejie Formation. The activity of the second-level and the third-level faults formed in the early stage were gradually weakened or stopped after the sedimentation of the second member of Shahejie Formaiton. Large numbers of third-level and the fourth-level faults formed,and the framework characterized of multifaults-multiuplifts-multisubsags became more obvious. The equilibrium crustal gravity subsidence resulted in the seesaw-type differentiation of the strata and controlled the evolution of subsags combined with the fault activity. The Paleogene fault activity controlled the subsag evolution and the distribution of hydrocarbon source rocks in Dongpu Sag,and the occurrence of the fault controlled the morphology of subsag and the type of kerogen.
引文
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[2]李思田,林畅松,张启明,等.南海北部大陆边缘盆地幕式裂陷的动力过程及10 Ma以来的构造事件[J].科学通报,1998,48(8):797-810.LI Sitian,LIN Changsong,ZHANG Qiming,et al.The dynamic process of episodic fissure in the continental margin basin in the northern part of the south China sea and the tectonic events since10 Ma[J].Chinese Science Bulletin,1998,48(8):797-810.
[3]林畅松,张燕梅,李思田,等.中国东部中新生代断陷盆地幕式裂陷过程的动力学响应和模拟模型[J].地球科学——中国地质大学学报,2004,29(5):583-588.LIN Changsong,ZHANG Yanmei,LI Sitian,et al.Episodic rifting dynamic process and quantitative model of Mesozoic-Cenozoic faulted basins in eastern China[J].Earth Science-Journal of China University of Geosciences,2004,29(5):583-588.
[4]焦养泉,李思田,解习农,等.多幕裂陷作用的表现形式:以珠江口盆地西部及其外围地区为例[J].石油实验地质,1997,19(3):222-227.JIAO Yangquan,LI Sitian,XIE Xinong,et al.Manifestation of multistage episodic rifting-take western Pearl River Mouth basin and its peripheral area as an example[J].Experimental Petroleum Geology,1997,19(3):222-227.
[5] HARDY S.Numerical modeling of the response to variable stretching rate of a domino fault block system[J].Marine and Petroleum Geology,1993,10(2):145-152.
[6]茹克.南海北部边缘叠合式盆地的发育及其大地构造意义[J].石油与天然气地质,1988,9(1):22-30.RU Ke.The development of the superimposed basin on the northern margin of the South China Sea and its tectonic significance[J].Oil&Gas Geology,1988,9(1):22-30.
[7]程秀申.东濮古近纪伸展断陷构造样式[D].北京:中国地质大学(北京),2011.CHENG Xiushen.Structural styles in Dongpu Paleogene extensional faulted depression[D].Beijing:China University of Geosciences(Beijing),2011.
[8]李继东.东濮凹陷构造特征与断块群成藏条件分析[D].北京:中国地质大学(北京),2008.LI Jidong.Analysis of structural characteristics and reservoir condition of fault blocks in Donpu Depression[D].Beijing:China University of Geosciences(Beijing),2008.
[9]谈玉明,程秀申,陈书平,等.东濮凹陷复杂断块群及勘探潜力分析[J].石油与天然气地质,2011,32(4):584-592.TAN Yuming,CHENG Xiushen,CHEN Shuping,et al.Complex fault-block groups in Dongpu Sag and their exploration potential[J].Oil&Gas Geology,2011,32(4):584-592.
[10]漆家福,杨桥,陆克政,等.渤海湾盆地基岩地质图及其所包含的构造运动信息[J].地学前缘,2004,11(3):299-307.QI Jiafu,YANG Qiao,LU Kezheng,et al.Geologic map of suboutcrop and its implied information of tectogenesis in Bohai Bay basin province[J].Earth Science Frontiers,2004,11(3):299-307.
[11]程秀申,漆家福,陈书平,等.关于东濮凹陷构造单位的探讨[J].断块油气田,2009,16(4):15-18.CHENG Xiushen,QI Jiafu,CHEN Shuping,et al.Discussion on structural units of Dongpu Depression[J].Fault-Block Oil&Gas Field,2009,16(4):15-18.
[12]漆家福,夏义平,杨桥.油区构造解析[M].北京:石油工业出版社,2009.QI Jiafu,XIA Yiping,YANG Qiao.Structural analysis of oil area[M].Beijing:Petroleum Industry Press,2009.
[13]朱光有,金强,张水昌,等.济阳坳陷生烃洼陷的成因类型及生烃潜力比较[J].天然气工业,2005,25(11):17-21.ZHU Guangyou,JIN Qiang,ZHANG Shuichang,et al.Research on the genetic type and hydrocarbon generation potential of the hydrocarbon generation sag in Jiyang Depression[J].Natural Gas Industry,2005,25(11):17-21.
[14]温宏雷,邓辉,李正宇,等.渤海海域新近系明化镇组断裂控藏作用定量评价——以黄河口凹陷中央构造脊为例[J].油气地质与采收率,2017,24(4):36-42.WEN Honglei,DENG Hui,LI Zhengyu,et al.Quantitative evaluation of control effect of faults on hydrocarbon accumulation in the Minghuazhen Formation,Bohai Sea:A case study of central structural ridge in Huanghekou sag[J].Petroleum Geology and Recovery Efficiency,2017,24(4):36-42.
[15]张辉,胡望水,李伟,等.关键层面古地貌演化剖面的建立及地质意义[J].油气地质与采收率,2018,25(2):8-14.ZHANG Hui,HU Wangshui,LI Wei,et al.Establishment of paleo-topography evolutionary section of key strata boundary and its geological implications[J].Petroleum Geology and Recovery Efficiency,2018,25(2):8-14.
[16]马立驰,王永诗,景安语,等.济阳坳陷滩海地区古近系构造样式及其控藏作用[J].油气地质与采收率,2018,25(1):1-5.MA Lichi,WANG Yongshi,JING Anyu,et al.Paleogene tectonic styles and their controls on hydrocarbon accumulation in the shallow sea of the Jiyang Depression[J].Petroleum Geology and Recovery Efficiency,2018,25(1):1-5.
[17]邓爱居,张少华,李凤群,等.饶阳凹陷肃宁地区新生代断裂活动及其对油气成藏的控制作用[J].油气地质与采收率,2017,24(3):18-24.DENG Aiju,ZHANG Shaohua,LI Fengqun,et al.Cenozoic fault activity and its control on hydrocarbon accumulation in Suning area of Raoyang sag,Bohai Bay Basin[J].Petroleum Geology and Recovery Efficiency,2017,24(3):18-24.
[18]李艳友,漆家福,周赏.走滑构造差异变形特征及其主控因素分析:基于砂箱模拟实验[J].石油实验地质,2017,39(5):711-715.LI Yanyou,QI Jiafu,ZHOU Shang.Differential deformation and its main controls on strike-slip structures:Evidence from sandbox experiments[J].Petroleum Geology&Experiment,2017,39(5):711-715.
[19]徐春华,王亚琳.渤海湾盆地济阳坳陷凹隆结构类型及其对沉积的控制作用[J].石油实验地质,2017,39(5):587-592.XU Chunhua,WANG Yalin.Depression and apophysis structure type and its controls on deposition in the Jiyang Depression,Bohai Bay Basin[J].Petroleum Geology&Experiment,2017,39(5):587-592.
[20]徐小龙,蒋有录,王红亮,等.东濮-莘县凹陷兰聊断裂活动及对沉积的控制[J].特种油气藏,2017,24(1):16-21.XU Xiaolong,JIANG Youlu,WANG Hongliang,et al.Lanliao faulting activities and their control over sedimentation in the Dongpu-Xinxian Sag[J].Special Oil&Gas Reservoirs,2017,24(1):16-21.
[21]王飞龙,牛成民,汤国民.莱州湾凹陷中央构造带断层活动性及其控藏作用[J].大庆石油地质与开发,2017,36(6):1-9.WANG Feilong,NIU Chengmin,TANG Guomin.Activity and reservoir-controlling action of the faults in the central structure belt of Laizhou Bay Sag[J].Petroleum Geology&Oilfield Development in Daqing,2017,36(6):1-9.
[22]卿颖,冯建伟,杨少春,等.基于物理-数值联合模拟的多期断裂形成机制及演化研究[J].山东科技大学学报:自然科学版,2018,37(1):60-70.QING Ying,FENG Jianwei,YANG Shaochun,et al.Formation mechanism and evolution of multi-phase fault based on physical and numerical simulation[J].Journal of Shandong University of Science and Technology:Natural Science,2018,37(1):60-70.
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