• 中国出版政府奖提名奖

    中国百强科技报刊

    湖北出版政府奖

    中国高校百佳科技期刊

    中国最美期刊

    留言板

    尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

    姓名
    邮箱
    手机号码
    标题
    留言内容
    验证码

    珠江口盆地浅水陆架区拆离断陷的构造变形与沉积充填响应:以恩平凹陷为例

    蔡国富 彭光荣 吴静 白海军 李颖薇 许新明 龚文 李孔森

    蔡国富, 彭光荣, 吴静, 白海军, 李颖薇, 许新明, 龚文, 李孔森, 2022. 珠江口盆地浅水陆架区拆离断陷的构造变形与沉积充填响应:以恩平凹陷为例. 地球科学, 47(7): 2391-2409. doi: 10.3799/dqkx.2022.215
    引用本文: 蔡国富, 彭光荣, 吴静, 白海军, 李颖薇, 许新明, 龚文, 李孔森, 2022. 珠江口盆地浅水陆架区拆离断陷的构造变形与沉积充填响应:以恩平凹陷为例. 地球科学, 47(7): 2391-2409. doi: 10.3799/dqkx.2022.215
    Cai Guofu, Peng Guangrong, Wu Jing, Bai Haijun, Li Yingwei, Xu Xinming, Gong Wen, Li Kongsen, 2022. Sedimentary Filling Response to Detachment Structural Deformation in Shallow-Water Continental Shelf of Pearl River Mouth Basin: A Case Study of Enping Sag. Earth Science, 47(7): 2391-2409. doi: 10.3799/dqkx.2022.215
    Citation: Cai Guofu, Peng Guangrong, Wu Jing, Bai Haijun, Li Yingwei, Xu Xinming, Gong Wen, Li Kongsen, 2022. Sedimentary Filling Response to Detachment Structural Deformation in Shallow-Water Continental Shelf of Pearl River Mouth Basin: A Case Study of Enping Sag. Earth Science, 47(7): 2391-2409. doi: 10.3799/dqkx.2022.215

    珠江口盆地浅水陆架区拆离断陷的构造变形与沉积充填响应:以恩平凹陷为例

    doi: 10.3799/dqkx.2022.215
    基金项目: 

    中海油重大生产科研项目 KJZH-2021-0003-00

    中海油重大生产科研项目 CCL2020SZPS0168

    详细信息
      作者简介:

      蔡国富(1989-), 男, 工程师, 主要从事石油地质综合研究.ORCID: 0000-0001-5472-6227.E-mail: caigf2@cnooc.com.cn

    • 中图分类号: P618.13

    Sedimentary Filling Response to Detachment Structural Deformation in Shallow-Water Continental Shelf of Pearl River Mouth Basin: A Case Study of Enping Sag

    • 摘要: 珠江口盆地新生代发育跨越浅水区至深水区、多类型的拆离断陷,其中浅水陆架区拆离断陷是探究拆离构造变形与沉积充填响应的重要窗口.基于地震资料和钻井资料详细解析,对恩平凹陷低角度拆离断层特征进行了研究,探讨了拆离构造变形的控制因素、变形过程和沉积充填响应机制.研究表明,恩平凹陷低角度边界正断层为壳间拆离断层,长度约50 km,倾角平均17.5°,断面最深达中下地壳,裂陷期经历了中低角度到低角度的转变.拆离断层形成于中生代先存逆冲断层基础之上,与中下地壳韧性剪切穹隆和边界调节性走滑断裂相伴生,联合控制形成均衡深拆离、前展式宽拆离和迁移型复式拆离3种凹陷结构类型.垂向上可划分出三期裂陷幕,因差异构造变形而具有不同的沉积充填响应:(1)早文昌期均一裂陷幕,快速的裂陷沉降发育于先存逆冲断层弱面,形成具厚层中深湖的均一窄深箕状半地堑;(2)晚文昌期拆离伸展幕,凹陷受差异构造变形而发育成东、西沉积充填差异化的宽浅断陷,西部韧性剪切穹隆弱隆升与边界走滑断层强走滑控制了恩平17洼自迁移型中深湖和大型辫状河三角洲-重力流沉积,而东部韧性剪切穹隆强隆升控制了恩平12-18洼沉积中心跳跃式异迁移的沉积充填,过渡带发育大型走向斜坡扇三角洲;(3)恩平期拆离-断拗联控幕,构造变形由简单剪切向纯剪切转变,沉积向外流水系主导的浅水辫状河三角洲-浅湖相充填转变.低角度拆离断陷具有与高角度脆性断陷不同的构造变形和沉积充填响应,烃源岩与砂岩储层的时空分布非均质性强.研究成果对恩平凹陷的烃源岩和深部储层预测,以及南海北部陆缘同类拆离断陷的构造-沉积充填研究具有良好的指导意义.

       

    • 图  1  珠江口盆地构造区划与断陷分布(改自庞雄等(2021)李洪博等(2020)

      Fig.  1.  Distribution of tectonic units and depressions in the Pearl River Mouth Basin(modified from Pang et al. (2021), Li et al. (2020))

      图  2  恩平凹陷基底顶面构造地貌与地层柱状图

      Fig.  2.  Structural geomorphology of basement top and stratigraphic column of the Enping Sag

      图  3  恩平凹陷控洼断层基底断距(a)、现今倾角(b)以及早、晚文昌期倾角(c)

      Fig.  3.  Fault displacement (a), present dip angle (b) and dip angle of Lower and Upper Wenchang Formation depositional period (c) of the depression-controlling faults in the Enping Sag

      图  4  恩平凹陷结构剖面(剖面位置见图 2

      Fig.  4.  Seismic sections demonstrating the structure of the Enping Sag

      图  5  恩平凹陷中下地壳韧性剪切穹隆特征

      a. 韧性剪切穹隆顶面深度与T80断裂叠合图;b. 过恩平12-18洼穹隆地震剖面;c. 过恩平17洼地震剖面

      Fig.  5.  The characteristics of ductile shear dome in the middle-lower crust below Enping Sag

      图  6  F3走滑断层构造特征

      a. T80层深度构造图,平面位置见图 2;b. F3走滑断层及其派生构造样式

      Fig.  6.  The characteristics of the F3 strike-slip fault

      图  7  恩平凹陷文昌组下段与上段地层等厚图

      Fig.  7.  The stratigraphic thickness of Lower and Upper Wenchang formations in the Enping Sag

      图  8  E17井古生物与单井相综合柱状图

      Fig.  8.  Comprehensive column of paleontology and single well facies of Well E17

      图  9  恩平17洼地震剖面与沉积充填解释(剖面位置见图 2

      Fig.  9.  Seismic section and its sedimentary filling interpretation cross Enping 17 Subsag

      图  10  恩平12洼和恩平18洼地震剖面与沉积充填解释(剖面位置见图 4d

      Fig.  10.  Seismic section and its sedimentary filling interpretation cross Enping 12 and 18 subsags

      图  11  恩平凹陷文昌组-恩平组平面沉积相

      Fig.  11.  Sedimentary facies of Wenchang and Enping formations

      图  12  恩平凹陷低角度拆离的构造-沉积充填演化模式

      Fig.  12.  The tectonic-sedimentary evolution models of Enping Sag linked to low angle detachment rift

    • Cai, G.F., Zhang, X.T., Peng, G.R., et al., 2021. Neogene Volcanism and Tectonics along the Yangjing-Yitong'ansha Fault Zone in the Northern South China Sea Margin. Geotectonica et Metallogenia, 45(1): 40-52 (in Chinese with English abstract).
      Chen, H., Xie, X. N., Mao, K. N., et al., 2020. Depositional Characteristics and Formation Mechanisms of Deep-Water Canyon Systems along the Northern South China Sea Margin. Journal of Earth Science, 31(4): 808-819. https://doi.org/10.1007/s12583-020-1284-z
      Deng, P., Mei, L.F., Du, J.Y., et al., 2020. Characteristics and Genetic Development of a Low-Angle Boundary Normal Fault in Xijiang Main Sag, Pearl River Mouth Basin, China. Oil & Gas Geology, 41(3): 606-616 (in Chinese with English abstract).
      Deng, H. D., Ren, J. Y., Pang, X., et al., 2020. South China Sea Documents the Transition from Wide Continental Rift to Continental Break up. Nature Communications, 11(1): 4583. https://doi.org/10.1038/s41467-020-18448-y
      Friedmann, S. J., Burbank, D. W., 1995. Rift Basins and Supradetachment Basins: Intracontinental Extensional End-Members. Basin Research, 7(2): 109-127. https://doi.org/10.1111/j.1365-2117.1995.tb00099.x
      Gong, L., Zhu, H.T., Shu, Y., et al., 2014. Distribution of Middle-Deep Lacustrine Source Rocks within Sequence Stratigraphic Framework of Wenchang Formation in Enping Depression, the Pearl River Mouth Basin. Earth Science, 39(5): 546-556 (in Chinese with English abstract).
      He, Y., Mei, L.F., Shi, H.S., et al., 2018. Structural Characteristics and Genetic Model of the Low-Angle Fault Depression: A Case in Enping Depression of Pearl River Mouth Basin. Marine Origin Petroleum Geology, 23(3): 73-81 (in Chinese with English abstract).
      Li, H.B., Zheng, J.Y., Pang, X., et al., 2020. Structural Patterns and Controlling Factors of Differential Detachment in the Northern Continental Margin of the South China Sea: Taking Baiyun-Liwan Deep Water Area in the Pearl River Mouth Basin as an Example. China Offshore Oil and Gas, 32(4): 24-35 (in Chinese with English abstract).
      Lister, G. S., Davis, G. A., 1989. The Origin of Metamorphic Core Complexes and Detachment Faults Formed during Tertiary Continental Extension in the Northern Colorado River Region, U.S.A. . Journal of Structural Geology, 11(1-2): 65-94. https://doi.org/10.1016/0191-8141(89)90036-9
      Liu, B.J., Pang, X., Wang, J.H., et al., 2019. Sedimentary System Response Process and Hydrocarbon Exploration Significance of Crust Thinning Zone at Extensional Continental Margin of Deep-Water Area in Pearl River Mouth Basin. Acta Petrolei Sinica, 40(S1): 124-138 (in Chinese with English abstract).
      Liu, B.J., Pang, X., Xie, S.W., et al., 2022. The Control Effect of Crust-Mantle Detachment Fault Activity on Deep Large Delta Sedimentary System in Baiyun Sag, Pearl River Mouth Basin. Earth Science, 47(7): 2354-2373 (in Chinese with English abstract).
      Liu, Q.H., Zhu, H.T., Shu, Y., et al., 2015. Provenance Systems and Their Control on the Beach-Bar of Paleogene Enping Formation, Enping Sag, Pearl River Mouth Basin. Acta Petrolei Sinica, 36(3): 286-299 (in Chinese with English abstract).
      Liu, Q.H., Zhu, H.T., Yang, X.H., et al., 2013. Quantitative Recognition of Seismic Sequence Stratigraphic Units in Wenchang Formation, Paleogene, Enping Sag, Pearl River Mouth Basin. Journal of Central South University (Science and Technology), 44(3): 1076-1082 (in Chinese with English abstract).
      Masini, E., Manatschal, G., Mohn, G., et al., 2011. The Tectono-Sedimentary Evolution of a Supra-Detachment Rift Basin at a Deep-Water Magma-Poor Rifted Margin: The Example of the Samedan Basin Preserved in the Err Nappe in SE Switzerland. Basin Research, 23(6): 652-677. https://doi.org/10.1111/j.1365-2117.2011.00509.x
      Mi, L.J., Zhang, X.T., Pang, X., et al., 2019. Formation Mechanism and Petroleum Geology of Pearl River Mouth Basin. Acta Petrolei Sinica, 40(S1): 1-10 (in Chinese with English abstract).
      Pang, X., Ren, J.Y., Zheng, J.Y., et al., 2018. Petroleum Geology Controlled by Extensive Detachment Thinning of Continental Margin Crust: A Case Study of Baiyun Sag in the Deep-Water Area of Northern South China Sea. Petroleum Exploration and Development, 45(1): 27-39 (in Chinese with English abstract).
      Pang, X., Zheng, J.Y., Mei, L.F., et al., 2021. Characteristics and Origin of Continental Marginal Fault Depressions under the Background of Preexisting Subduction Continental Margin, Northern South China Sea, China. Petroleum Exploration and Development, 48(5): 1069-1080 (in Chinese with English abstract).
      Qi, J.F., Wu, J.F., Ma, B.S., et al., 2019. The Structural Model and Dynamics Concerning Middle Section, Pearl River Mouth Basin in North Margin of South China Sea. Earth Science Frontiers, 26(2): 203-221 (in Chinese with English abstract).
      Ren, J.Y., Pang, X., Lei, C., et al., 2015. Ocean and Continent Transition in Passive Continental Margins and Analysis of Lithospheric Extension and Breakup Process: Implication for Research of the Deepwater Basins in the Continental Margins of South China Sea. Earth Science Frontiers, 22(1): 102-114 (in Chinese with English abstract).
      Ren, J.Y., Pang, X., Yu, P., et al., 2018. Characteristics and Formation Mechanism of Deepwater and Ultra-Deepwater Basins in the Northern Continental Margin of the South China Sea. Chinese Journal of Geophysics, 61(12): 4901-4920 (in Chinese with English abstract).
      Reston, T. J., Leythaeuser, T., Booth-Rea, G., et al., 2007. Movement along a Low-Angle Normal Fault: The S Reflector West of Spain. Geochemistry, Geophysics, Geosystems, 8(6): Q06002. https://doi.org/10.1029/2006GC001437
      Shi, H.S., Du, J.Y., Mei, L.F., et al., 2020. Huizhou Movement and Its Significance in Pearl River Mouth Basin, China. Petroleum Exploration and Development, 47(3): 447-461 (in Chinese with English abstract).
      Sun, Z., Li, F.C., Lin, J., et al., 2021. The Rifting-Breakup Process of the Passive Continental Margin and Its Relationship with Magmatism: The Attribution of the South China Sea. Earth Science, 46(3): 770-789 (in Chinese with English abstract).
      Sun, Z., Lin, J., Qiu, N., et al., 2019. The Role of Magmatism in the Thinning and Breakup of the South China Sea Continental Margin. National Science Review, 6(5): 871-876. https://doi.org/10.1093/nsr/nwz116
      Taylor, M. H., Kapp, P. A., Horton, B. K., 2012. Basin Response to Active Extension and Strike-Slip Deformation in the Hinterland of the Tibetan Plateau. In: Tectonics of Sedimentary Basins. John Wiley & Sons, Chichester, 445-460. https://doi.org/10.1002/9781444347166.ch22
      Wang, J.H., Liu, L.H., Chen, S.H., et al., 2011. Tectonic-Sedimentary Responses to the Second Episode of the Zhu-Qiong Movement in the Enping Depression, Pearl River Mouth Basin and Its Regional Tectonic Significance. Acta Petrolei Sinica, 32(4): 588-595 (in Chinese with English abstract).
      Wu, J., Zhu, D.W., Zhao, P., et al., 2021. Controls of Faulted Composite Accumulation Ridge on the Long Distance Migration and Accumulation of Neogene Hydrocarbon: A Case Study of the Eastern Yangjiang Sag and the Enping Sag in the Pearl River Mouth Basin. Geotectonica et Metallogenia, 45(1): 131-139 (in Chinese with English abstract).
      Xiong, W.L., Zhu, J.Z., Yang, X.Y., et al., 2020. Study on the Genetic Sources and Accumulation Processes of Oil and Gas in the North Uplift Structural Belt of Enping Sag. China Offshore Oil and Gas, 32(1): 54-65 (in Chinese with English abstract).
      Ye, Q., Mei, L. F., Jiang, D. P., et al., 2022.3-D Structure and Development of a Metamorphic Core Complex in the Northern South China Sea Rifted Margin. Journal of Geophysical Research: Solid Earth, 127(2): e2021JB022595. https://doi.org/10.1029/2021JB022595
      Ye, Q., Mei, L. F., Shi, H. S., et al., 2018. A Low-Angle Normal Fault and Basement Structures within the Enping Sag, Pearl River Mouth Basin: Insights into Late Mesozoic to Early Cenozoic Tectonic Evolution of the South China Sea Area. Tectonophysics, 731-732: 1-16. https://doi.org/10.1016/j.tecto.2018.03.003
      Zeng, Z.W., Yang, X.H., Shu, Y., et al., 2015. Structure Palaeogeomorphology Characteristics and Sand Bodies Distribution Regularities of Paleogene Wenchang Formation in Enping Sag: Under the Conditions of Lack of Drilling Data to Predict and Evaluate the Reservoir Sand Bodies. Geoscience, 29(4): 804-815 (in Chinese with English abstract).
      Zhang, X.T., Liu, P., Wang, W.Y., et al., 2021. Controlling Effect of Tectonic Transformation in Paleogene Wenchang Formation on Oil and Gas Accumulation in Zhu Ⅰ Depression. Earth Science, 46(5): 1797-1813 (in Chinese with English abstract).
      Zhou, Z. C., Mei, L. F., Shi, H. S., et al., 2019. Evolution of Low-Angle Normal Faults in the Enping Sag, the Northern South China Sea: Lateral Growth and Vertical Rotation. Journal of Earth Science, 30(6): 1326-1340. https://doi.org/10.1007/s12583-019-0899-4
      Zhu, H.T., Li, S., Liu, H.R., et al., 2016. The Types and Implication of Migrated Sequence Stratigraphic Architecture in Continental Lacustrine Rift Basin: an Example from the Paleogene Wenchang Formation of Zhu Ⅰ Depression, Pearl River Mouth Basin. Earth Science, 41(3): 361-372 (in Chinese with English abstract).
      蔡国富, 张向涛, 彭光荣, 等, 2021. 南海北部阳江-一统暗沙断裂带与新近纪岩浆活动. 大地构造与成矿学, 45(1): 40-52. https://www.cnki.com.cn/Article/CJFDTOTAL-DGYK202101004.htm
      邓棚, 梅廉夫, 杜家元, 等, 2020. 珠江口盆地西江主洼低角度边界正断层特征及成因演化. 石油与天然气地质, 41(3): 606-616. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT202003017.htm
      龚丽, 朱红涛, 舒誉, 等, 2014. 珠江口盆地恩平凹陷文昌组层序格架中中-深湖相烃源岩空间展布规律及发育模式. 地球科学, 39(5): 546-556. doi: 10.3799/dqkx.2014.052
      何勇, 梅廉夫, 施和生, 等, 2018. 低角度断陷盆地成因模式及结构特征: 以珠江口盆地恩平低角度断陷为例. 海相油气地质, 23(3): 73-81. doi: 10.3969/j.issn.1672-9854.2018.03.008
      李洪博, 郑金云, 庞雄, 等, 2020. 南海北部陆缘差异拆离作用结构样式与控制因素: 以珠江口盆地白云-荔湾深水区为例. 中国海上油气, 32(4): 24-35. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD202004003.htm
      柳保军, 庞雄, 王家豪, 等, 2019. 珠江口盆地深水区伸展陆缘地壳减薄背景下的沉积体系响应过程及油气勘探意义. 石油学报, 40(S1): 124-138. doi: 10.7623/syxb2019S1011
      柳保军, 庞雄, 谢世文, 等, 2022. 珠江口盆地白云凹陷壳幔拆离断裂活动对深层大型三角洲沉积体系的控制作用. 地球科学, 47(7): 2354-2373. doi: 10.3799/dqkx.2022.035
      刘强虎, 朱红涛, 舒誉, 等, 2015. 珠江口盆地恩平凹陷古近系恩平组物源体系及其对滩坝的控制. 石油学报, 36(3): 286-299.
      刘强虎, 朱红涛, 杨香华, 等, 2013. 珠江口盆地恩平凹陷古近系文昌组地震层序地层单元定量识别. 中南大学学报(自然科学版), 44(3): 1076-1082. https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGD201303035.htm
      米立军, 张向涛, 庞雄, 等, 2019. 珠江口盆地形成机制与油气地质. 石油学报, 40(S1): 1-10. doi: 10.7623/syxb2019S1001
      庞雄, 任建业, 郑金云, 等, 2018. 陆缘地壳强烈拆离薄化作用下的油气地质特征: 以南海北部陆缘深水区白云凹陷为例. 石油勘探与开发, 45(1): 27-39. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201801004.htm
      庞雄, 郑金云, 梅廉夫, 等, 2021. 先存俯冲陆缘背景下南海北部陆缘断陷特征及成因. 石油勘探与开发, 48(5): 1069-1080. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK202105021.htm
      漆家福, 吴景富, 马兵山, 等, 2019. 南海北部珠江口盆地中段伸展构造模型及其动力学. 地学前缘, 26(2): 203-221. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201902019.htm
      任建业, 庞雄, 雷超, 等, 2015. 被动陆缘洋陆转换带和岩石圈伸展破裂过程分析及其对南海陆缘深水盆地研究的启示. 地学前缘, 22(1): 102-114.
      任建业, 庞雄, 于鹏, 等, 2018. 南海北部陆缘深水-超深水盆地成因机制分析. 地球物理学报, 61(12): 4901-4920. doi: 10.6038/cjg2018L0558
      施和生, 杜家元, 梅廉夫, 等, 2020. 珠江口盆地惠州运动及其意义. 石油勘探与开发, 47(3): 447-461. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK202003003.htm
      孙珍, 李付成, 林间, 等, 2021. 被动大陆边缘张-破裂过程与岩浆活动: 南海的归属. 地球科学, 46(3): 770-789. doi: 10.3799/dqkx.2020.371
      王家豪, 刘丽华, 陈胜红, 等, 2011. 珠江口盆地恩平凹陷珠琼运动二幕的构造-沉积响应及区域构造意义. 石油学报, 32(4): 588-595. doi: 10.3969/j.issn.1001-8719.2011.04.015
      吴静, 朱定伟, 赵鹏, 等, 2021. 断裂复合汇聚脊对新近系油气远距离富集的控制作用: 以珠江口盆地阳江东凹与恩平凹陷为例. 大地构造与成矿学, 45(1): 131-139. https://www.cnki.com.cn/Article/CJFDTOTAL-DGYK202101011.htm
      熊万林, 朱俊章, 杨兴业, 等, 2020. 恩平凹陷北部隆起构造带油气成因来源及成藏过程研究. 中国海上油气, 32(1): 54-65. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD202001006.htm
      曾智伟, 杨香华, 舒誉, 等, 2015. 恩平凹陷古近系文昌组构造古地貌特征及砂体展布规律——少井条件下储集砂体预测与评价. 现代地质, 29(4): 804-815. doi: 10.3969/j.issn.1000-8527.2015.04.009
      张向涛, 刘培, 王文勇, 等, 2021. 珠一坳陷古近系文昌期构造转变对油气成藏的控制作用. 地球科学, 46(5): 1797-1813. doi: 10.3799/dqkx.2020.106
      朱红涛, 李森, 刘浩冉, 等, 2016. 陆相断陷湖盆迁移型层序构型及意义: 以珠Ⅰ坳陷古近系文昌组为例. 地球科学, 41(3): 361-372. doi: 10.3799/dqkx.2016.028
    • 加载中
    图(12)
    计量
    • 文章访问数:  697
    • HTML全文浏览量:  812
    • PDF下载量:  106
    • 被引次数: 0
    出版历程
    • 收稿日期:  2022-04-15
    • 刊出日期:  2022-07-25

    目录

      /

      返回文章
      返回