二连盆地宝勒根陶海凹陷北洼槽下白垩统构造-沉积响应特征
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摘要
通过钻井、地震等资料研究表明,宝勒根陶海凹陷北洼槽发育下白垩统赛汉塔拉组、腾格尔组、阿尔善组及侏罗系为非对称单断箕状凹陷。根据不同区带的沉积构造特点,可将该凹陷划分为东部陡带、中央洼槽带、西部斜坡内带和斜坡外带4个次级构造单元。宝勒根陶海凹陷的断裂系统主要由东部边界大断层控制及其派生出来的二级或三级断层组成,以北东走向断层为主,断层控制了地层沉积和构造形成。宝勒根陶海凹陷东断西超的地质结构控制了沉积相带的展布,多期构造运动形成多期沉积间断和多期湖侵(生油中心),沉积地层具有多物源、近物源和粗碎屑的沉积特点,以扇三角洲、辫状河三角洲和近岸水下扇为特色的砂体类型,形成了低成分、低结构成熟度的岩石类型和中低孔、低-特低渗储集类型。北部主洼槽区沉积生烃中心的缓坡带和中央洼槽带,是发现整装工业性油藏的有利区带。
The drilling and earthquake research material shows that Baolegentaohai sag north subsags developt Saihantala Formation,Tengger Formation,Aershan Formation and the Jurassic stratum,Lower Cretaceous,for asymmetric single broken unsymmetrical fault-depression sag.According to different areas of sedimentary structure characteristics,the sag can be divided into eastern steep belt,central subsags belt the west slope inside belt and outside belt count up four subprime units.Baolegentaohai sag fault systems mainly composed of the eastern boundary large faults controlled and its derived level 2 or 3 fault,based on the principle of east to north fault,the faults controlled the formation of sediment-ary and structure.The westfaulting east overlapping of Baolegen-taohai sag geologic structure controlled the exhibition of sedimentary facies belt,many structural movements formated serial sedimentary break and transgression(source center),sedimentary formations that is nearer provenance,multiple origins and coarse sediment,the sand types were fandelta,braid river deltas and nearshore subaqueous fan,reservoir type was low compositional and textural maturities of turbidites and middle-low porosity and low-low penetrance.The hydrocarbon generation center of ramp zone and central subsags belt in north lord subsags area are favorable zones for the stand industrial reservoir.
The drilling and earthquake research material shows that Baolegentaohai sag north subsags developt Saihantala Formation,Tengger Formation,Aershan Formation and the Jurassic stratum,Lower Cretaceous,for asymmetric single broken unsymmetrical fault-depression sag.According to different areas of sedimentary structure characteristics,the sag can be divided into eastern steep belt,central subsags belt the west slope inside belt and outside belt count up four subprime units.Baolegentaohai sag fault systems mainly composed of the eastern boundary large faults controlled and its derived level 2 or 3 fault,based on the principle of east to north fault,the faults controlled the formation of sediment-ary and structure.The westfaulting east overlapping of Baolegen-taohai sag geologic structure controlled the exhibition of sedimentary facies belt,many structural movements formated serial sedimentary break and transgression(source center),sedimentary formations that is nearer provenance,multiple origins and coarse sediment,the sand types were fandelta,braid river deltas and nearshore subaqueous fan,reservoir type was low compositional and textural maturities of turbidites and middle-low porosity and low-low penetrance.The hydrocarbon generation center of ramp zone and central subsags belt in north lord subsags area are favorable zones for the stand industrial reservoir.
引文
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杜金虎,易士威,雷怀玉,等.二连盆地岩性地层油藏形成条件与油气分布规律[J].石油地质,2004,(3):1-6.Du Jinhu,Yi Shiwei,Lei Huaiyu,et al.Formation Condi-tions for Lithologe and Stratigraphic Oil ReservoirsandOil and Gas Distribution in Erlian Basin[J].PetroleunGeology,2004,(3):1-6.
肖阳,唐谨,孙朝辉,等.二连盆地阿尔凹陷油气成藏条件及油藏类型[J].中国石油勘探,2010,15(2):41-45.Xiao Yang,Tang Jin,Sun Zhaohui,et al.Hydrocarbon Ac-cumulation Conditions and Reservoir Types of Aer Sagin Erlian Basin[J].China Petroleun Exploration,2010,15(2):41-45.
吕百顺,王忠贵,王方,等.二连盆地章古特地区浅层油藏地质特征[J].矿产与地质,2011,25(3):253-256.LüBaishun,Wang Zhonggui,Wang Fang,et al.Geo-lo-gical Characteristics of Shallow Oil Pool in Zhanggutearea of Erlian Basin[J].Mineral Resources and Geolo-gy.2011,25(3):253-256.
李金良,樊太亮,张岳桥.二连盆地白音查干凹陷层序地层及其油气勘探意义[J].地质力学学报,2007,13(1):60-68.Li Jinliang,Fan Tailiang,Zhang Yueqiao.Sequence stratig-raphy of the Bayanqagan subbasin in the Erlian basinand applications for petroleum exploration[J].Journalof Geomechanics,2007,13(1):60-68.
谢利华,周彤,杨建成.白音查干凹陷油气成藏条件及油气分布规律[J].石油地质与工程,2008,22(3):16-20.Xie Lihua,Zhou Tong,Yang Jiancheng.Hydrocarbon poolforming conditiona and distribution regularity of Baiyin-chagan sag[J].Petroleum Geology and Engineering,2008,22(3):16-20.
梁官忠,彭仕宓,马莉,等.二连盆地阿尔善构造带油气分布与聚集规律[J].西安石油学院学报(自然科学版),2003,18(5):5-9.Liang Guanzhong,Peng Shimi,Ma Li,et al.Hydrocarbondistribution and accumulation laws of Aershan structur-al zone in Erlian Basin[J].Journal of Xi'an PetroleumInstitute,2003,18(5):5-9.
赵澄林,祝玉衡.二连盆地储层沉积学[M].北京:石油工业出版社,1996.Zhao Chenglin,Zhu Yuheng.Reservoir sedimentation ofErlian Basin[M].Petroleum Industry Press,Beijing,1996.
张福顺.二连盆地白音查干凹陷构造沉降对沉积的控制作用[J].地质力学学报,2003,(2):136-142.Zhang Fushun.Control of structure on the sedimentation inBayinchagan depression Erlian basin[J].Journal ofGeomechanics,2003,9(2):136-142
赵志刚,李亮,李书民,等.二连盆地赛汉塔拉组构造样式及凹陷成因类型研究[J].大庆石油地质与开发,2005,24(6):11-14.Zhao Zhigang,Li Liang,Li Shumin.Structure Style ofSaihantala Sag in Erlian Basin and Its Genesis Type[J].Petroleum Geology&Oil Field Development inDaqing,2005,24(6):11-14.
闫文华,张万福,张立新,等.二连盆地塞汉塔拉凹陷地质综合评价及目标优选[J].石油地球物理勘探,2008,43(增刊1):139-145.Yan Wenhua,Zhang Wanfu,Zhang Lixin,et al.Integrativegeologic evaluation and objective optimi-zation ofSaihantala sag,Erlian basin[J].Oil geopysical Pros-pecting,2008,43(Suppl.1):139-145.
刘震,付东阳,肖伟,等.二连盆地三种典型构造带岩性油藏形成模式分析[J].现代地质,2007,29(1):32-39.Liu Zhen,Fu Dongyang,Xiao Wei,et al.The analysis offormation models of lithological reservoirs on three kings of typical structural zones in the Erlian basin[J].Geoscience.2007,29(1):32-39.
赵贤正,史原鹏,降栓奇,等.二连盆地阿尔凹陷科学、快速、高效勘探实践和认识[J].石油地质,2010,(01):1-5.Zhao Xianzheng,Shi Yuanpeng,Jiang Shuanqi,et al.Fast,and Efficient Exploration in Aer Sag of Erlian Basin[J].Petroleun Geology,2010,(01):1-5.
杜金虎,易士威,雷怀玉,等.二连盆地岩性地层油藏形成条件与油气分布规律[J].石油地质,2004,(3):1-6.Du Jinhu,Yi Shiwei,Lei Huaiyu,et al.Formation Condi-tions for Lithologe and Stratigraphic Oil ReservoirsandOil and Gas Distribution in Erlian Basin[J].PetroleunGeology,2004,(3):1-6.
肖阳,唐谨,孙朝辉,等.二连盆地阿尔凹陷油气成藏条件及油藏类型[J].中国石油勘探,2010,15(2):41-45.Xiao Yang,Tang Jin,Sun Zhaohui,et al.Hydrocarbon Ac-cumulation Conditions and Reservoir Types of Aer Sagin Erlian Basin[J].China Petroleun Exploration,2010,15(2):41-45.
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