辽西低凸起中南段古近系东营组层序地层及地层-岩性油气藏勘探意义
|
摘要
陆相断陷盆地古地貌控砂研究较为成熟,但由同沉积构造的活动及其配置所产生的古地貌动态变化对沉积物砂分散体系控制的研究较少。通过对辽西低凸起中南段东营组构造-层序地层和沉积相开展整体和系统性研究,依据体系域界面和各体系域内三角洲地震反射构型的变化,有效地识别了东二层序的低位、水进和高位3个体系域,建立起研究区高精度层序地层格架。在层序地层单元精细划分对比的基础上,对层序格架内古地貌和沉积体系发育和演化规律进行了研究。研究区主要发育辫状河三角洲、曲流河三角洲、湖底扇和湖泊等沉积体系;辽西低凸起边界断层从北向南依次发育3个调节带,调节带的平面和空间差异活动控制了三角洲朵体的迁移。根据对各体系域砂体特征的描述,在东二层序识别了断层-岩性、上倾尖灭、岩性和地层超覆等4种地层-岩性圈闭类型。
The control of palaeotopography on the distribution of sandbodies has been well studied in continental rifted basin,while the control of palaeotopography dynamic changes caused by syndepositional structure movement on the sand distribution is less studied.Through the systematic study of tectonic-sequence stratigraphy and sedimentary facies of the Paleogene Dongying Formation in the central-south Liaoxi salient,the LST,TST and HST are recognized in the 2nd member of the Dongying Formation according to system tract boundaries and the seismic reflection features of deltas.A high resolution sequence stratigraphy framework is established.On the basis of the fine division and correlation of sequence stratigraphy unit,the paper studied the palaeotopography and the development and evolution of depositional system.The study reveals that braided river delta,meandering river delta,sublacustrine fan and lake are well developed in the study area.There are three transform belts along the boundary fault in the salient from north to south.The areal and spatial variation of activity of the transform belts is the key factor controlling the migration of delta lobes.Four types of stratigraphic-lithologic traps,including fault-lithologic trap,sandstone updip pinchout trap,lithologic trap and stratigraphic overlap trap,are recognized in the 2nd member of the Dongying Formation based on the sandbody characterization of each system tract.
The control of palaeotopography on the distribution of sandbodies has been well studied in continental rifted basin,while the control of palaeotopography dynamic changes caused by syndepositional structure movement on the sand distribution is less studied.Through the systematic study of tectonic-sequence stratigraphy and sedimentary facies of the Paleogene Dongying Formation in the central-south Liaoxi salient,the LST,TST and HST are recognized in the 2nd member of the Dongying Formation according to system tract boundaries and the seismic reflection features of deltas.A high resolution sequence stratigraphy framework is established.On the basis of the fine division and correlation of sequence stratigraphy unit,the paper studied the palaeotopography and the development and evolution of depositional system.The study reveals that braided river delta,meandering river delta,sublacustrine fan and lake are well developed in the study area.There are three transform belts along the boundary fault in the salient from north to south.The areal and spatial variation of activity of the transform belts is the key factor controlling the migration of delta lobes.Four types of stratigraphic-lithologic traps,including fault-lithologic trap,sandstone updip pinchout trap,lithologic trap and stratigraphic overlap trap,are recognized in the 2nd member of the Dongying Formation based on the sandbody characterization of each system tract.
引文
[1]赵力民,赵贤正,刘井旺,等.冀中坳陷古近系地层岩性油藏成藏特征及勘探方向[J].石油学报,2009,30(4):492-505.Zhao Limin,Zhao Xianzheng,Liu Jingwang,et al.Characteristics of Paleogene stratigraphic and lithologic reservoirs and itsexploration direction in Jizhong Depression[J].Acta Petrolei Sinica,2009,30(4):492-505.
[2]石世革.黄骅坳陷板桥凹陷古近系沙一段中部层序地层学研究与岩性油气藏勘探[J].石油与天然气地质,2008,29(3):321-325.Shi Shige.Study of sequence stratigraphy and exploration of lithologic reservoirs in the Paleogene Middle Sha-1Member,the Banqiao Sag of the Huanghua Depression[J].Oil&Gas Geology,2008,29(3):321-325.
[3]王化爱.东营凹陷古近系岩性地层油气藏层序地层学特征[J].石油与天然气地质,2010,31(2):158-164.Wang Hua’ai.Sequence stratigraphic characteristics of the Paleocene lithologic and stratigraphic reservoirs in the Dongying Depression[J].Oil&Gas Geology,2010,31(2):158-164.
[4]庞雄,陈长民,彭大钧,等.南海珠江深水扇系统的层序地层学研究[J].地学前缘,2007,14(1):220-229.Pang Xiong,Chen Changmin,Peng Dajun,et al.Sequence stratigraphy of Pearl river deepwater fan systemin the South China Sea[J].Earth Science Frontiers,2007,14(1):220-229.
[5]蒙启安,纪友亮.塔南凹陷白垩纪古地貌对沉积体系分布的控制作用[J].石油学报,2009,30(6):843-855.Meng Qi’an,Ji Youliang.Controlling of paleo geomorphology to distribution of sedimentary system in the Cretaceous of Ta’nan Depression[J].Acta Petrolei Sinica,2009,30(6):843-855.
[6]Lin Changsong,Erikoson K,Li Sitian,et al.Sequence architecture,depositional systems,and controls on development of lacustrine basin fills in part of the Erlian Basin,Northeast China[J].AAPG Bulletin,2001,85(11):2017-2043.
[7]高红灿,郑荣才,陈发亮,等.渤海湾盆地东濮凹陷古近系沙河街组层序地层[J].石油与天然气地质,2011,32(6):839-850.Gao Hongcan,Zheng Rongcai,Chen Faliang,et al.Sequence stratigraphy of the Paleogene Shahejie Formation in Dongpu Sag,Bohai Bay Basin[J].Oil&Gas Geology.2011,32(5):839-850.
[8]姜在兴.沉积体系及层序地层学研究现状及发展趋势[J].石油与天然气地质,2010,31(5):536-541.Jiang Zaixing.Studies of depositional systems and sequence stratigraphy:the present and the future[J].Oil&Gas Geology,2010,31(5):536-541.
[9]苗顺德,李秋芬,欧阳诚.黄骅坳陷古近系层序地层格架特征及模式研究[J].中国地质,2008,35(2):256-263.Miao Shunde,Li Qiufen,Ou Yangcheng.Paleogene sequence stratigraphic framework and model in the Huanghua depression[J].Geology in China,2008,35(2):256-263.
[10]赖维成,宋章强,周心怀,等.地质一地震储层预测技术及其在渤海海域的应用[J].现代地质,2009,23(5):934-939.Lai Weicheng,Song Zhangqiang,Zhou Xinhuai,et al.Geologyseismic technique of reservoir prediction and its application in Bohai Ofshore Area[J].Geoscience,2009,23(5):934-939.
[11]Cross TA.Stratigraphie controls on reservoir attributes in continental strata[J].Geoscience,2000,7(4):322-350.
[12]徐长贵,许效松,丘东洲,等.辽东湾地区辽西凹陷中南部古近系构造格架与层序地层格架及古地理分析[J].古地理学报,2005,7(4):449-459.Xu Changgui,Xu Xiaosong,Qiu Dongzhou,et al.Structural and sequence stratigraphic frameworks and palaeogeography of the Paleogene in centralsouthern Liaoxi Sag,Liaodongwan Bay area[J].Journal of Palaeogeography,2005,7(4):449-459.
[13]李维峰,高振中,彭德堂,等.库车坳陷中生界三种三角洲比较研究[J].沉积学报,1999,17(3):430-434.Li Weifeng,Gao Zhenzhong,Peng Detang,et al.Comparative study of fan deltas,braided river deltas and meandering riverdeltas of Mesozoic in Kuche depression,Tarim Basin[J].Acta Sedimentologica Sinica,1999,17(3):430-434.
[14]姜辉.浊流沉积的动力学机制与响应[J].石油与天然气地质,2010,31(4):428-435.Jiang Hui.Dynamical mechanism and depositional responses of turbidity current sedimentation[J].Oil&Gas Geology,2010,31(4):428-435.
[15]卓勤功.断陷盆地洼陷带岩性油气藏成藏机理及运聚模式[J].石油学报,2006,27(6):19-23.Zhuo Qingong.Reservoirforming mechanism and migrationaccumulation mode of lithological pool in deep subdepression of riftsubsidence basin[J].Acta Petrolei Sinica,2006,27(6):19-23.
[2]石世革.黄骅坳陷板桥凹陷古近系沙一段中部层序地层学研究与岩性油气藏勘探[J].石油与天然气地质,2008,29(3):321-325.Shi Shige.Study of sequence stratigraphy and exploration of lithologic reservoirs in the Paleogene Middle Sha-1Member,the Banqiao Sag of the Huanghua Depression[J].Oil&Gas Geology,2008,29(3):321-325.
[3]王化爱.东营凹陷古近系岩性地层油气藏层序地层学特征[J].石油与天然气地质,2010,31(2):158-164.Wang Hua’ai.Sequence stratigraphic characteristics of the Paleocene lithologic and stratigraphic reservoirs in the Dongying Depression[J].Oil&Gas Geology,2010,31(2):158-164.
[4]庞雄,陈长民,彭大钧,等.南海珠江深水扇系统的层序地层学研究[J].地学前缘,2007,14(1):220-229.Pang Xiong,Chen Changmin,Peng Dajun,et al.Sequence stratigraphy of Pearl river deepwater fan systemin the South China Sea[J].Earth Science Frontiers,2007,14(1):220-229.
[5]蒙启安,纪友亮.塔南凹陷白垩纪古地貌对沉积体系分布的控制作用[J].石油学报,2009,30(6):843-855.Meng Qi’an,Ji Youliang.Controlling of paleo geomorphology to distribution of sedimentary system in the Cretaceous of Ta’nan Depression[J].Acta Petrolei Sinica,2009,30(6):843-855.
[6]Lin Changsong,Erikoson K,Li Sitian,et al.Sequence architecture,depositional systems,and controls on development of lacustrine basin fills in part of the Erlian Basin,Northeast China[J].AAPG Bulletin,2001,85(11):2017-2043.
[7]高红灿,郑荣才,陈发亮,等.渤海湾盆地东濮凹陷古近系沙河街组层序地层[J].石油与天然气地质,2011,32(6):839-850.Gao Hongcan,Zheng Rongcai,Chen Faliang,et al.Sequence stratigraphy of the Paleogene Shahejie Formation in Dongpu Sag,Bohai Bay Basin[J].Oil&Gas Geology.2011,32(5):839-850.
[8]姜在兴.沉积体系及层序地层学研究现状及发展趋势[J].石油与天然气地质,2010,31(5):536-541.Jiang Zaixing.Studies of depositional systems and sequence stratigraphy:the present and the future[J].Oil&Gas Geology,2010,31(5):536-541.
[9]苗顺德,李秋芬,欧阳诚.黄骅坳陷古近系层序地层格架特征及模式研究[J].中国地质,2008,35(2):256-263.Miao Shunde,Li Qiufen,Ou Yangcheng.Paleogene sequence stratigraphic framework and model in the Huanghua depression[J].Geology in China,2008,35(2):256-263.
[10]赖维成,宋章强,周心怀,等.地质一地震储层预测技术及其在渤海海域的应用[J].现代地质,2009,23(5):934-939.Lai Weicheng,Song Zhangqiang,Zhou Xinhuai,et al.Geologyseismic technique of reservoir prediction and its application in Bohai Ofshore Area[J].Geoscience,2009,23(5):934-939.
[11]Cross TA.Stratigraphie controls on reservoir attributes in continental strata[J].Geoscience,2000,7(4):322-350.
[12]徐长贵,许效松,丘东洲,等.辽东湾地区辽西凹陷中南部古近系构造格架与层序地层格架及古地理分析[J].古地理学报,2005,7(4):449-459.Xu Changgui,Xu Xiaosong,Qiu Dongzhou,et al.Structural and sequence stratigraphic frameworks and palaeogeography of the Paleogene in centralsouthern Liaoxi Sag,Liaodongwan Bay area[J].Journal of Palaeogeography,2005,7(4):449-459.
[13]李维峰,高振中,彭德堂,等.库车坳陷中生界三种三角洲比较研究[J].沉积学报,1999,17(3):430-434.Li Weifeng,Gao Zhenzhong,Peng Detang,et al.Comparative study of fan deltas,braided river deltas and meandering riverdeltas of Mesozoic in Kuche depression,Tarim Basin[J].Acta Sedimentologica Sinica,1999,17(3):430-434.
[14]姜辉.浊流沉积的动力学机制与响应[J].石油与天然气地质,2010,31(4):428-435.Jiang Hui.Dynamical mechanism and depositional responses of turbidity current sedimentation[J].Oil&Gas Geology,2010,31(4):428-435.
[15]卓勤功.断陷盆地洼陷带岩性油气藏成藏机理及运聚模式[J].石油学报,2006,27(6):19-23.Zhuo Qingong.Reservoirforming mechanism and migrationaccumulation mode of lithological pool in deep subdepression of riftsubsidence basin[J].Acta Petrolei Sinica,2006,27(6):19-23.
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