二连盆地巴音都兰凹陷反转构造及其对油气成藏的影响
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摘要
重点探讨了对二连盆地巴音都兰凹陷反转构造的类型识别、成因机制及油气成藏的影响。综合分析认为,从腾二段沉积期开始,巴音都兰凹陷结构格局开始发生根本性转变,中洼由原来盆地的沉降中心演变成了包楞构造带低凸起和巴一号构造带次级沉降中心,并使整个巴音都兰凹陷的沉降中心分别向北洼和南洼的中部迁移。走滑牵引型反转构造经历了由走滑伸展断层牵引非强硬盖层形成反转背斜褶皱和背斜脊部断裂-塌落形成负花状构造两个演化阶段,是较长时间持续应力作用的结果;而基底隆升型反转构造是深部异常体上涌导致的局部构造隆升现象,为突发性的短时事件。基底隆升型反转构造对于提高古地温梯度和降低生油门限等方面具有非常重要的影响,而走滑牵引型反转构造对于储层改善、圈闭形成以及油气运移和浅部聚集成藏等方面具有重要影响。本文研究对于正确认识二连盆地乃至我国东部盆地群在早白垩世发育的反转构造的成因类型、动力机制及对油气成藏的影响等方面具有重要的借鉴意义。
The paper focuses on discussing the influences of inversion structure on type identification,genetic mechanism and hydrocarbon accumulation of the Bayindulan sag in the Erlian basin.According to the comprehensive analysis,the structural configuration of the Bayindulan sag has undergone a fundamental transformation since the K1bt2 depositional stage,the central sag evolved from the subsidence center of the original basin to the low bulge of the Baoleng structural belt and the secondary subsidence center of Ba-1structural belt,which migrated the subsidence center of the entire Bayindulan sag towards the central partsof the northern sag and southern sag,respectively.The strike-slip traction inversion structure has experienced two evolutionary stages,namely the reversed anticline fold formed by the unconsolidated caprock pulling by the strike-slip extension fault,and the minus flower structure formed by the rupture-collapsing of anticline ridge,which is the consequence of long-term continuous stress.The basal uplifting inversion structure is a local structural uplift caused by the upwelling of deep anomalies,which is a sudden shortterm event.The basal uplifting inversion structure has a very important influence on improving the palaeogeothermal gradient and reducing the oil generation threshold,while the strike-slip traction inversion structure is of importance for reservoir improvement,trap formation,hydrocarbon migration and shallow accumulation.This paper is of great significance for correctly understanding the inversion structure genetic type,dynamic mechanism and influence on the hydrocarbon accumulation in the Early Cretaceous of the Erlian basin and even the basin group in the eastern China.
The paper focuses on discussing the influences of inversion structure on type identification,genetic mechanism and hydrocarbon accumulation of the Bayindulan sag in the Erlian basin.According to the comprehensive analysis,the structural configuration of the Bayindulan sag has undergone a fundamental transformation since the K1bt2 depositional stage,the central sag evolved from the subsidence center of the original basin to the low bulge of the Baoleng structural belt and the secondary subsidence center of Ba-1structural belt,which migrated the subsidence center of the entire Bayindulan sag towards the central partsof the northern sag and southern sag,respectively.The strike-slip traction inversion structure has experienced two evolutionary stages,namely the reversed anticline fold formed by the unconsolidated caprock pulling by the strike-slip extension fault,and the minus flower structure formed by the rupture-collapsing of anticline ridge,which is the consequence of long-term continuous stress.The basal uplifting inversion structure is a local structural uplift caused by the upwelling of deep anomalies,which is a sudden shortterm event.The basal uplifting inversion structure has a very important influence on improving the palaeogeothermal gradient and reducing the oil generation threshold,while the strike-slip traction inversion structure is of importance for reservoir improvement,trap formation,hydrocarbon migration and shallow accumulation.This paper is of great significance for correctly understanding the inversion structure genetic type,dynamic mechanism and influence on the hydrocarbon accumulation in the Early Cretaceous of the Erlian basin and even the basin group in the eastern China.
引文
[1]王燮培,费琪,张家骅.石油勘探构造分析[M].武汉:中国地质大学出版社,1990:255-268.
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[5]阳怀忠,任建业,陆金波.东营凹陷负反转构造样式及其运动学特征[J].地球科学——中国地质大学学报,2009,34(3):493-501.YANG Huaizhong,REN Jianye,LU Jinbo.Tectonic styles and kinematic characteristics of negative inversion structure in Dongying depression[J].Earth Science—Journal of China University of Geosciences,2009,34(3):493-501.
[6]强昆生,吕修祥,周心怀,等.渤海辽东湾坳陷JX1-1反转构造与油气成藏史[J].矿物岩石,2012,32(4):31-40.QIANG Kunsheng,LV Xiuxiang,ZHOU Xinhuai,et al.The inversion structure zone and reservoir history of the JX1-1area in Liaodongwan depression,offshore Bohai Bay basin[J].Journal of Mineralogy and Petrology,2012,32(4):31-40.
[7] BONINI M,SANI F,ANTONIELLI B.Basin inversion and contractional reactivation of inherited normal faults:A review based on previous and new experimental models[J].Tectonophysics,2011,522-523(3):55-88.
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[9]刘见宝,夏斌,吕宝凤,等.反转构造与其易混淆构造的对比分析[J].现代地质,2010,24(4):744-748.LIU Jianbao,XIA Bin,LV Baofeng,et al.Comparative analysis of inversion structure with its easily confused structures[J].Geoscience,2010,24(4):744-748.
[10]杨风丽,王敏雪,庄建建,等.西湖凹陷反转构造定量运动学过程及对油气的控制作用[J].石油学报,2010,31(4):596-601.YANG Fengli,WANG Minxue,ZHUANG Jianjian,et al.Kinematical processes of inversion structure and its contribution to hydrocarbon accumulation in Xihu Depression of East China Sea Basin[J].Acta Petrolei Sinica,2010,31(4):596-601.
[11]杨克基,漆家福,余一欣,等.辽中凹陷反转构造及其对郯庐断裂带走滑活动的响应[J].岩石学报,2016,32(4):1182-1196.YANG Keji,QI Jiafu,YU Yixin,et al.The inversion structures within Liaozhong depression and its responds to the strike-slip activities of Tan-Lu fault zone[J].Acta Petrologica Sinica,2016,32(4):1182-1196.
[12]赵贤正,金凤鸣,王权,等.陆相断陷盆地洼槽聚油理论及其应用:以渤海湾盆地冀中坳陷和二连盆地为例[J].石油学报,2011,32(1):18-24.ZHAO Xianzheng,JIN Fengming,WANG Quan,et al.Theory of hydrocarbon accumulation in troughs within continental faulted basins and its application:A case study in Jizhong Depression and Erlian Basin[J].Acta Petrolei Sinica,2011,32(1):18-24.
[13]常亮,殷宏平,陈亚青,等.二连盆地巴音都兰凹陷巴II构造隐蔽油藏的发现[J].石油勘探与开发,2002,29(4):60-62.CHANG Liang,YIN Hongping,CHEN Yaqing,et al.Subtle oil reservoir discovery in structure II of Bayindulan sag,Erlian basin[J].Petroleum Exploration and Development,2002,29(4):60-62.
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[15]褚庆忠.含油气盆地反转构造研究综述[J].西安石油大学学报(自然科学版),2004,19(1):28-33.CHU Qingzhong.Summary of inversion structure on petroliferous basin[J].Journal of Xi’an Shiyou University(National Science Edition),2004,19(1):28-33.
[16] YANG Y T,GUO Z X,SONG C C,et al.A short-lived but significant Mongol-Okhotsk collisional orogeny in latest Jurassicearliest Cretaceous[J].Gondwana Research,2015,28(3):1096-1116.
[17]肖安成,杨树峰,陈汉林.二连盆地形成的地球动力学背景[J].石油与天然气地质,2001,22(2):137-140.XIAO Ancheng,YANG Shufeng,CHEN Hanlin.Geodynamic background on formation of Erlian basin[J].Oil&Gas Geology,2001,22(2):137-140.
[18]漆家福,赵贤正,李先平,等.二连盆地早白垩世断陷分布及其与基底构造的关系[J].地学前缘,2015,22(3):118-128.QI Jiafu,ZHAO Xianzheng,LI Xianping,et al.The distribution of Early Cretaceous faulted sags and their relationship with basement structure within Erlian Basin[J].Earth Science Frontiers,2015,22(3):118-128.
[19]朱光,牛漫兰,刘国生.郯庐断裂带早白垩世走滑运动中的构造、岩浆、沉积事件[J].地质学报,2002,76(3):325-334.ZHU Guang,NIU Manlan,LIU Guosheng.Structural,magmatic and sedimentary events of the Tanlu fault belt during its early Cretaceous strike-slip movement[J].Acta Geologica Sinica,2002,76(3):325-334.
[20]刘晓峰,董月霞,王华.渤海湾盆地南堡凹陷的背形负花状构造[J].地球科学——中国地质大学学报,2010,35(6):1029-1034.LIU Xiaofeng,DONG Yuexia,WANG Hua.Antiformal negative flower structure in Nanpu sag,Bohai Bay basin[J].Earth Science—Journal of China University of Geoscience,2010,35(6):1029-1034.
[21]任战利,刘池阳,冯建辉,等.二连盆地巴音都兰凹陷热演化史研究[J].石油学报,2000,21(4):42-45.REN Zhanli,LIU Chiyang,FENG Jianhui,et al.Research on geothermal history of Bayindulan Depression in Erlian basin[J].Acta Petrolei Sinica,2000,21(4):42-45.
[22]方杰,顾连兴,刘宝泉,等.二连盆地稠油地球化学及其成因探讨[J].地质论评,2002,48(3):304-312.FANG Jie,GU Lianxing,LIU Baoquan,et al.Geochemistry and genesis of inspissated oil in the Erlian basin,North China[J].Geological Review,2002,48(3):304-312.
[23]高日胜,方杰,王暾,等.陆相盆地重质油成因类型及其稠变序列:以二连盆地为例[J].石油学报,2013,34(3):479-488.GAO Risheng,FANG Jie,WANG Tun,et al.Genetic types and densification series of heavy oils in non-marine basins:A case study on Erlian basin[J].Acta Petrolei Sinica,2013,34(3):479-488.
[24]陈哲龙,柳广弟,卢学军,等.二连盆地反转构造程度定量研究及对油气成藏的影响[J].中南大学学报(自然科学版),2015,46(11):4136-4145.CHEN Zhelong,LIU Guangdi,LU Xuejun,et al.Quantatitive study on inversion degree of inversion tectonics and its impact on hydrocarbon accumulation in Erlian Basin,Northern China[J].Journal of Central South University(Science and Technology),2015,46(11):4136-4145.
[2] HARDING T P.Structural inversion at Rambuton oil field,south Sumatra basin[J].AAPG Bulletin,1983,63(8):1001-1021.
[3] EISENSTADT G,WITHJACK M O.Estimating inversion:results from clay models[J].Geological Society,1995,88(1):119-136.
[4] TURNER J P,WILLIAMS G A.Sedimentary basin inversion and intra-plate shortening[J].Earth-Science Reviews,2004,65(3):277-304.
[5]阳怀忠,任建业,陆金波.东营凹陷负反转构造样式及其运动学特征[J].地球科学——中国地质大学学报,2009,34(3):493-501.YANG Huaizhong,REN Jianye,LU Jinbo.Tectonic styles and kinematic characteristics of negative inversion structure in Dongying depression[J].Earth Science—Journal of China University of Geosciences,2009,34(3):493-501.
[6]强昆生,吕修祥,周心怀,等.渤海辽东湾坳陷JX1-1反转构造与油气成藏史[J].矿物岩石,2012,32(4):31-40.QIANG Kunsheng,LV Xiuxiang,ZHOU Xinhuai,et al.The inversion structure zone and reservoir history of the JX1-1area in Liaodongwan depression,offshore Bohai Bay basin[J].Journal of Mineralogy and Petrology,2012,32(4):31-40.
[7] BONINI M,SANI F,ANTONIELLI B.Basin inversion and contractional reactivation of inherited normal faults:A review based on previous and new experimental models[J].Tectonophysics,2011,522-523(3):55-88.
[8]漆家福,夏义平,杨桥.油区构造解析[M].北京:石油工业出版社,2006.
[9]刘见宝,夏斌,吕宝凤,等.反转构造与其易混淆构造的对比分析[J].现代地质,2010,24(4):744-748.LIU Jianbao,XIA Bin,LV Baofeng,et al.Comparative analysis of inversion structure with its easily confused structures[J].Geoscience,2010,24(4):744-748.
[10]杨风丽,王敏雪,庄建建,等.西湖凹陷反转构造定量运动学过程及对油气的控制作用[J].石油学报,2010,31(4):596-601.YANG Fengli,WANG Minxue,ZHUANG Jianjian,et al.Kinematical processes of inversion structure and its contribution to hydrocarbon accumulation in Xihu Depression of East China Sea Basin[J].Acta Petrolei Sinica,2010,31(4):596-601.
[11]杨克基,漆家福,余一欣,等.辽中凹陷反转构造及其对郯庐断裂带走滑活动的响应[J].岩石学报,2016,32(4):1182-1196.YANG Keji,QI Jiafu,YU Yixin,et al.The inversion structures within Liaozhong depression and its responds to the strike-slip activities of Tan-Lu fault zone[J].Acta Petrologica Sinica,2016,32(4):1182-1196.
[12]赵贤正,金凤鸣,王权,等.陆相断陷盆地洼槽聚油理论及其应用:以渤海湾盆地冀中坳陷和二连盆地为例[J].石油学报,2011,32(1):18-24.ZHAO Xianzheng,JIN Fengming,WANG Quan,et al.Theory of hydrocarbon accumulation in troughs within continental faulted basins and its application:A case study in Jizhong Depression and Erlian Basin[J].Acta Petrolei Sinica,2011,32(1):18-24.
[13]常亮,殷宏平,陈亚青,等.二连盆地巴音都兰凹陷巴II构造隐蔽油藏的发现[J].石油勘探与开发,2002,29(4):60-62.CHANG Liang,YIN Hongping,CHEN Yaqing,et al.Subtle oil reservoir discovery in structure II of Bayindulan sag,Erlian basin[J].Petroleum Exploration and Development,2002,29(4):60-62.
[14]费宝生,祝玉衡,邹伟宏,等.二连裂谷盆地群油气地质[M].北京:石油工业出版社,2001:1-23.
[15]褚庆忠.含油气盆地反转构造研究综述[J].西安石油大学学报(自然科学版),2004,19(1):28-33.CHU Qingzhong.Summary of inversion structure on petroliferous basin[J].Journal of Xi’an Shiyou University(National Science Edition),2004,19(1):28-33.
[16] YANG Y T,GUO Z X,SONG C C,et al.A short-lived but significant Mongol-Okhotsk collisional orogeny in latest Jurassicearliest Cretaceous[J].Gondwana Research,2015,28(3):1096-1116.
[17]肖安成,杨树峰,陈汉林.二连盆地形成的地球动力学背景[J].石油与天然气地质,2001,22(2):137-140.XIAO Ancheng,YANG Shufeng,CHEN Hanlin.Geodynamic background on formation of Erlian basin[J].Oil&Gas Geology,2001,22(2):137-140.
[18]漆家福,赵贤正,李先平,等.二连盆地早白垩世断陷分布及其与基底构造的关系[J].地学前缘,2015,22(3):118-128.QI Jiafu,ZHAO Xianzheng,LI Xianping,et al.The distribution of Early Cretaceous faulted sags and their relationship with basement structure within Erlian Basin[J].Earth Science Frontiers,2015,22(3):118-128.
[19]朱光,牛漫兰,刘国生.郯庐断裂带早白垩世走滑运动中的构造、岩浆、沉积事件[J].地质学报,2002,76(3):325-334.ZHU Guang,NIU Manlan,LIU Guosheng.Structural,magmatic and sedimentary events of the Tanlu fault belt during its early Cretaceous strike-slip movement[J].Acta Geologica Sinica,2002,76(3):325-334.
[20]刘晓峰,董月霞,王华.渤海湾盆地南堡凹陷的背形负花状构造[J].地球科学——中国地质大学学报,2010,35(6):1029-1034.LIU Xiaofeng,DONG Yuexia,WANG Hua.Antiformal negative flower structure in Nanpu sag,Bohai Bay basin[J].Earth Science—Journal of China University of Geoscience,2010,35(6):1029-1034.
[21]任战利,刘池阳,冯建辉,等.二连盆地巴音都兰凹陷热演化史研究[J].石油学报,2000,21(4):42-45.REN Zhanli,LIU Chiyang,FENG Jianhui,et al.Research on geothermal history of Bayindulan Depression in Erlian basin[J].Acta Petrolei Sinica,2000,21(4):42-45.
[22]方杰,顾连兴,刘宝泉,等.二连盆地稠油地球化学及其成因探讨[J].地质论评,2002,48(3):304-312.FANG Jie,GU Lianxing,LIU Baoquan,et al.Geochemistry and genesis of inspissated oil in the Erlian basin,North China[J].Geological Review,2002,48(3):304-312.
[23]高日胜,方杰,王暾,等.陆相盆地重质油成因类型及其稠变序列:以二连盆地为例[J].石油学报,2013,34(3):479-488.GAO Risheng,FANG Jie,WANG Tun,et al.Genetic types and densification series of heavy oils in non-marine basins:A case study on Erlian basin[J].Acta Petrolei Sinica,2013,34(3):479-488.
[24]陈哲龙,柳广弟,卢学军,等.二连盆地反转构造程度定量研究及对油气成藏的影响[J].中南大学学报(自然科学版),2015,46(11):4136-4145.CHEN Zhelong,LIU Guangdi,LU Xuejun,et al.Quantatitive study on inversion degree of inversion tectonics and its impact on hydrocarbon accumulation in Erlian Basin,Northern China[J].Journal of Central South University(Science and Technology),2015,46(11):4136-4145.