The tectono-sedimentary evolution characteristics and regional reservoir-forming model of Nan’an Basin in the Cenozoic
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摘要:
南安盆地是南海南部重要的大型含油气盆地之一，深入分析其构造-沉积演化特征对盆地油气勘探具有重要的指导作用。结合已有研究成果，开展盆地二维地震资料解释，识别出南安盆地新生代以来5个主要的二级层序界面和4套地震层序。在层序地层格架下，根据地震反射特征识别出南安盆地楔形、S型（丘状）等5类地震相类型；砂包泥岩、砂泥岩互层等7类地震岩相类型以及扇三角洲、河流三角洲等8类主要沉积相。综合盆地构造演化特征，南安盆地新生代以来主要分为4个阶段：初始裂陷阶段、主裂陷阶段、断拗转换阶段和拗陷热沉降阶段。其中，中中新世以前为盆地裂陷阶段，发育陆源碎屑沉积，早期为湖相沉积，晚期为滨浅海相沉积；中中新世以后为拗陷阶段，发育陆源碎屑沉积和碳酸盐岩沉积。通过油气成藏模式研究，南安盆地烃源岩发育且品质较好，有利储集相带纵向厚度大且横向范围广，区域盖层覆盖整个盆地，并形成了早期的自生自储和晚期的下生上储两类油气成藏系统。
Abstract:Nan’an Basin is one of the important large oil-gas basins in the southern South China Sea, and the in-depth analysis of its tectono-sedimentary evolution characteristics is of great significance for oil and gas exploration. Based on the existing research results, the 2D seismic data of the basin was interpreted, and five main second-order sequence interfaces and four sets of seismic sequences were identified in the basin in the Cenozoic. Based on the sequence stratigraphic framework, five types of seismic facies such as wedge-shaped and S-shaped (mound), seven seismic lithofacies types (such as sand-coated mudstone and interbedded sand-mudstone), and eight major sedimentary facies (such as fan delta and river delta) were identified. The tectonic evolution of the Cenozoic south basin was divided into four stages: initial rift stage, main rift stage, fault-depression transformation stage, and depression thermal subsidence stage. Before the Mid-Miocene was the main rift stage, during which terrigenous clastic deposits formed from early lacustrine deposition to later offshore deposition. After the Middle Miocene was the depression stage, during which terrigenous clastic deposits and carbonate deposits developed. The study of hydrocarbon accumulation model showed that, the source rocks in Nan’an Basin are well developed and of good quality, which favored the reservoir facies belt enlargement in a large longitudinal thickness and a wide lateral range. The regional cap rocks covered the whole basin, and two types of hydrocarbon accumulation systems were formed: self-generation and self-storage in the early stage, and lower-generation and upper-reservoir in the late stage.
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表 1 南安盆地主要地震相和地震岩相类型及特征
Table 1. Types and characteristics of main seismic facies and seismic lithofacies in Nan’an Basin
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[1] 肖鸿议, 何云龙, 解习农, 等. 南海万安盆地构造‒层序发育特征与构造‒沉积充填演化[J]. 地球科学, 2021, 46(9):3338-3351
XIAO Hongyi, HE Yunlong, XIE Xinong, et al. Characteristics of structural-sequence and evolution of tectonic and sedimentary of Wan’an Basin in South China Sea [J]. Earth Science, 2021, 46(9): 3338-3351.
[2] 王鹏程, 李三忠, 郭玲莉, 等. 南海打开模式: 右行走滑拉分与古南海俯冲拖曳[J]. 地学前缘, 2017, 24(4):294-319
WANG Pengcheng, LI Sanzhong, GUO Lingli, et al. Opening of the South China Sea: A joint effect of dextral strike-slip pull-apart and Proto-SCS slab pull [J]. Earth Science Frontiers, 2017, 24(4): 294-319.
[3] 雷超, 任建业, 张静. 南海构造变形分区及成盆过程[J]. 地球科学-中国地质大学学报, 2015, 40(4):744-762 doi: 10.3799/dqkx.2015.062
LEI Chao, REN Jianye, ZHANG Jing. Tectonic province divisions in the South China Sea: Implications for basin geodynamics [J]. Earth Science—Journal of China University of Geosciences, 2015, 40(4): 744-762. doi: 10.3799/dqkx.2015.062
[4] 陈强, 金庆焕. 南海西部万安断裂活动特征及其对万安盆地的控制作用[J]. 海洋地质前沿, 2017, 33(10):1-8 doi: 10.16028/j.1009-2722.2017.10001
CHEN Qiang, JIN Qinghuan. Activity features of Wan’an Fault and its constraints on Wan’an Basin, Western South China Sea [J]. Marine Geology Frontiers, 2017, 33(10): 1-8. doi: 10.16028/j.1009-2722.2017.10001
[5] 王蓓羽, 张健, 艾依飞. 南海西南部万安盆地新生代沉降分析及构造意义[J]. 中国科学院大学学报, 2020, 37(6):784-792 doi: 10.7523/j.issn.2095-6134.2020.06.009
WANG Beiyu, ZHANG Jian, AI Yifei. Analysis of tectonic evolution characteristics of Wan’an Basin in the Southwest of the South China Sea [J]. Journal of University of Chinese Academy of Sciences, 2020, 37(6): 784-792. doi: 10.7523/j.issn.2095-6134.2020.06.009
[6] 朱荣伟, 刘海龄, 姚永坚, 等. 南海西南次海盆两侧陆缘新生代构造沉降特征及演化过程[J]. 海洋地质与第四纪地质, 2020, 40(6):82-92 doi: 10.16562/j.cnki.0256-1492.2020052002
ZHU Rongwei, LIU Hailing, YAO Yongjian, et al. Cenozoic tectonic subsidence of the continental margins of Southwest Sub-basin, South China Sea and its evolution [J]. Marine Geology & Quaternary Geology, 2020, 40(6): 82-92. doi: 10.16562/j.cnki.0256-1492.2020052002
[7] 解习农, 任建业, 王振峰, 等. 南海大陆边缘盆地构造演化差异性及其与南海扩张耦合关系[J]. 地学前缘, 2015, 22(1):77-87 doi: 10.13745/j.esf.2015.01.007
XIE Xinong, REN Jianye, WANG Zhenfeng, et al. Difference of tectonic evolution of continental marginal basins of South China Sea and relationship with SCS spreading [J]. Earth Science Frontiers, 2015, 22(1): 77-87. doi: 10.13745/j.esf.2015.01.007
[8] 姚伯初. 南海南部地区的新生代构造演化[J]. 南海地质研究, 1994(6):1-15
YAO Bochu. Tectonical evolution on the southern margin of South China Sea [J]. Geological Research of South China Sea, 1994(6): 1-15.
[9] Yan P, Liu H L. Tectonic-stratigraphic division and blind fold structures in Nansha Waters, South China Sea [J]. Journal of Asian Earth Sciences, 2004, 24(3): 337-348. doi: 10.1016/j.jseaes.2003.12.005
[10] 刘海龄, 阎贫, 孙岩, 等. 南沙微板块的层块构造[J]. 中国地质, 2002, 29(4):374-381 doi: 10.3969/j.issn.1000-3657.2002.04.008
LIU Hailing, YAN Pin, SUN Yan, et al. Layer-block tectonics of the Nansha microplate [J]. Geology in China, 2002, 29(4): 374-381. doi: 10.3969/j.issn.1000-3657.2002.04.008
[11] Sclater J G, Christie P A F. Continental stretching: an explanation of the Post-Mid-Cretaceous subsidence of the central North Sea basin [J]. Journal of Geophysical Research:Solid Earth, 1980, 85(B7): 3711-3739. doi: 10.1029/JB085iB07p03711
[12] Lü C C, Hao T Y, Lin J, et al. The role of rifting in the development of the continental margins of the southwest subbasin, South China Sea: Insights from an OBS experiment [J]. Marine Geophysical Research, 2017, 38(1-2): 105-123. doi: 10.1007/s11001-016-9295-y
[13] 王龙, 谢晓军, 刘世翔, 等. 南海南部主要盆地油气分布规律及主控因素[J]. 天然气地球科学, 2017, 28(10):1546-1554
WANG Long, XIE Xiaojun, LIU Shixiang, et al. Analysis of hydrocarbon accumulation and diversity of the major basins in mid-southern part of the South China Sea [J]. Natural Gas Geoscience, 2017, 28(10): 1546-1554.
[14] 姚伯初, 刘振湖. 南沙海域沉积盆地及油气资源分布[J]. 中国海上油气, 2006, 18(3):150-160 doi: 10.3969/j.issn.1673-1506.2006.03.002
YAO Bochu, LIU Zhenhu. Sedimentary basins and petroleum resources in Nansha offshore area, South China Sea [J]. China Offshore Oil and Gas, 2006, 18(3): 150-160. doi: 10.3969/j.issn.1673-1506.2006.03.002
[15] 李三忠, 索艳慧, 刘鑫, 等. 南海的基本构造特征与成因模型: 问题与进展及论争[J]. 海洋地质与第四纪地质, 2012, 32(6):35-53
LI Sanzhong, SUO Yanhui, LIU Xin, et al. Basic structural pattern and tectonic models of the South China Sea: problems, advances and controversies [J]. Marine Geology & Quaternary Geology, 2012, 32(6): 35-53.
[16] 施秋华, 万志峰, 夏斌. 婆罗洲地质构造特征及其对南海南部盆地的影响[J]. 海洋地质前沿, 2013, 29(1):11-16 doi: 10.16028/j.1009-2722.2013.01.001
SHI Qiuhua, WAN Zhifeng, XIA Bin. Geology of Borneo Block and its influence on basins of southern South China Sea [J]. Marine Geology Frontiers, 2013, 29(1): 11-16. doi: 10.16028/j.1009-2722.2013.01.001
[17] 杨楚鹏, 姚永坚, 李学杰, 等. 万安盆地新生代层序地层格架与岩性地层圈闭[J]. 地球科学—中国地质大学学报, 2011, 36(5):845-852
YANG Chupeng, YAO Yongjian, LI Xuejie, et al. Cenozoic sequence stratigraphy and lithostratigraphic traps in Wan’an basin, the Southwestern South China Sea [J]. Earth Science—Journal of China University of Geosciences, 2011, 36(5): 845-852.
[18] Dung B V, Tuan H A, Van Kieu N, et al. Depositional environment and reservoir quality of Miocene sediments in the central part of the Nam Con Son Basin, southern Vietnam shelf [J]. Marine and Petroleum Geology, 2018, 97: 672-689. doi: 10.1016/j.marpetgeo.2018.05.004
[19] Lü C L, Wu S G, Yao Y J, et al. Development and controlling factors of Miocene carbonate platform in the Nam Con Son Basin, southwestern South China Sea [J]. Marine and Petroleum Geology, 2013, 45: 55-68. doi: 10.1016/j.marpetgeo.2013.04.014
[20] Thai S P D, Tien V P, Tran N H, et al. Quick pre-stack seismic inversion to predict reservoir properties at a gas and condensate field in Nam Con Son basin [J]. Petroleum Exploration & Production, 2007, 10(10): 40-44.
[21] 赵忠泉, 钟广见, 冯常茂, 等. 南海北部西沙海槽盆地新生代层序地层及地震相[J]. 海洋地质与第四纪地质, 2016, 36(1):15-26 doi: 10.16562/j.cnki.0256-1492.2016.01.002
ZHAO Zhongquan, ZHONG Guangjian, FENG Changmao, et al. Cenozoic sequence stratigraphy and seismic facies analysis of Xisha trough basin in northern South China Sea [J]. Marine Geology & Quaternary Geology, 2016, 36(1): 15-26. doi: 10.16562/j.cnki.0256-1492.2016.01.002
[22] 金庆焕, 李唐根. 南沙海域区域地质构造[J]. 海洋地质与第四纪地质, 2000, 20(1):1-8
JIN Qinghuan, LI Tanggen. Regional geologic tectonics of the Nansha sea area [J]. Marine Geology & Quaternary Geology, 2000, 20(1): 1-8.
[23] 姚永坚, 杨楚鹏, 李学杰, 等. 南海南部海域中中新世(T3界面)构造变革界面地震反射特征及构造含义[J]. 地球物理学报, 2013, 56(4):1274-1286 doi: 10.6038/cjg20130422
YAO Yongjian, YANG Chupeng, LI Xuejie, et al. The seismic reflection characteristics and tectonic significance of the tectonic revolutionary surface of mid-Miocene (T3 seismic interface) in the southern South China Sea [J]. Chinese Journal of Geophysics, 2013, 56(4): 1274-1286. doi: 10.6038/cjg20130422
[24] 周蒂, 孙珍, 杨少坤, 等. 南沙海区曾母盆地地层系统[J]. 地球科学—中国地质大学学报, 2011, 36(5):789-797
ZHOU Di, SUN Zhen, YANG Shaokun, et al. The stratigraphic system of the Zengmu Basin, Southern South China Sea [J]. Earth Science-Journal of China University of Geosciences, 2011, 36(5): 789-797.
[25] 孙珍, 赵中贤, 周蒂, 等. 南沙海域盆地的地层系统与沉积结构[J]. 地球科学—中国地质大学学报, 2011, 36(5):798-806
SUN Zhen, ZHAO Zhongxian, ZHOU Di, et al. The stratigraphy and the sequence architecture of the Basins in Nansha Region [J]. Earth Science-Journal of China University of Geosciences, 2011, 36(5): 798-806.
[26] Mitchum R M Jr, Vail P R, Sangree J B. Seismic stratigraphy and global changes of sea level, Part 6: Stratigraphic interpretation of seismic reflection patterns in depositional sequences[M]// Payton C E. Seismic Stratigraphy-Applications to Hydrocarbon Exploration. Tulsa: American Association of Petroleum Geologists, 1977, 26: 117-135.
[27] Rankey E C. Seismic architecture and seismic geomorphology of heterozoan carbonates: Eocene-Oligocene, Browse Basin, Northwest Shelf, Australia [J]. Marine and Petroleum Geology, 2017, 82: 424-443. doi: 10.1016/j.marpetgeo.2017.02.011
[28] Hutchison C S. Marginal basin evolution: the southern South China Sea [J]. Marine and Petroleum Geology, 2004, 21(9): 1129-1148. doi: 10.1016/j.marpetgeo.2004.07.002
[29] Madon M, Kim C L, Wong R. The structure and stratigraphy of deepwater Sarawak, Malaysia: implications for tectonic evolution [J]. Journal of Asian Earth Sciences, 2013, 76: 312-333. doi: 10.1016/j.jseaes.2013.04.040
[30] 石巨业, 樊太亮, 周娇, 等. 南图尔盖盆地几种典型地震相分析及其地质意义[J]. 科学技术与工程, 2015, 15(34):133-138
SHI Juye, FAN Tailiang, ZHOU Jiao, et al. Several typical seismic facies in South Turgay Basin and the geological meaning [J]. Science Technology and Engineering, 2015, 15(34): 133-138.
[31] 孔令辉, 凌涛, 叶青, 等. 地震相分析在沉积相研究中的应用[J]. 复杂油气藏, 2019, 12(2):36-40 doi: 10.16181/j.cnki.fzyqc.2019.02.008
KONG Linghui, LING Tao, YE Qing, et al. Application of seismic facies analysis in sedimentary facies research [J]. Complex Hydrocarbon Reservoirs, 2019, 12(2): 36-40. doi: 10.16181/j.cnki.fzyqc.2019.02.008
[32] 钱星, 张莉, 吴时国, 等. 南海西北次海盆构造演化的沉积响应[J]. 大地构造与成矿学, 2017, 41(2):248-257 doi: 10.16539/j.ddgzyckx.2017.02.002
QIAN Xing, ZHANG Li, WU Shiguo, et al. Sedimentary Response to Tectonic Evolution of the Northwest Sub-basin, South China Sea [J]. Geotectonica et Metallogenia, 2017, 41(2): 248-257. doi: 10.16539/j.ddgzyckx.2017.02.002
[33] 骆帅兵, 张莉, 徐国强, 等. 基于地震岩相分析的北康盆地晚渐新世沉积体系构建[J]. 海洋地质与第四纪地质, 2022, 42(1):123-134 doi: 10.16562/j.cnki.0256-1492.2021051001
LUO Shuaibing, ZHANG Li, XU Guoqiang, et al. Reconstruction of Late Oligocene depositional systems in the Beikang Basin by seismic facies analysis [J]. Marine Geology & Quaternary Geology, 2022, 42(1): 123-134. doi: 10.16562/j.cnki.0256-1492.2021051001
[34] Zeng H L. Seismic geomorphology-based facies classification [J]. The Leading Edge, 2004, 23(7): 644-688. doi: 10.1190/1.1776732
[35] 邱铁成, 王征, 纪中云, 等. 影响沉积盆地地震相分析结果的主要因素研究[J]. 地球物理学进展, 2014, 29(2):831-838
QIU Tiecheng, WANG Zheng, JI Zhongyun, et al. The research on main influence factors of seismic facies analysis in sedimentary basin [J]. Progress in Geophysics, 2014, 29(2): 831-838.
[36] 朱剑兵, 赵培坤. 国外地震相划分技术研究新进展[J]. 勘探地球物理进展, 2009, 32(3):167-171
ZHU Jianbing, ZHAO Peikun. Advances in seismic facies classification technology abroad [J]. Progress in Exploration Geophysics, 2009, 32(3): 167-171.
[37] 鲁宝亮, 王璞珺, 梁建设, 等. 古南海构造属性及其与特提斯和古太平洋构造域的关系[J]. 吉林大学学报:地球科学版, 2014, 44(5):1441-1450
LU Baoliang, WANG Pujun, LIANG Jianshe, et al. Structural properties of Paleo-South China Sea and their relationship with the Tethys and the Paleo-Pacific Tectonic Domain [J]. Journal of Jilin University:Earth Science Edition, 2014, 44(5): 1441-1450.
[38] 林长松, 初凤友, 高金耀, 等. 论南海新生代的构造运动[J]. 海洋学报, 2007, 29(4):87-96
LIN Changsong, CHU Fengyou, GAO Jinyao, et al. On tectonic movement in the South China Sea during the Cenozoic [J]. Acta Oceanologica Sinica, 2007, 29(4): 87-96.
[39] 钱坤, 闫义, 黄奇瑜, 等. 南海扩张过程及海陆变迁沉积记录[J]. 海洋地质前沿, 2016, 32(8):10-23 doi: 10.16028/j.1009-2722.2016.08002
QIAN Kun, YAN Yi, HUANG Qiyu, et al. Sea floor spreading of South China Sea and its depositional records of sea and land changes [J]. Marine Geology Frontiers, 2016, 32(8): 10-23. doi: 10.16028/j.1009-2722.2016.08002
[40] 张翀, 吴世敏, 丘学林. 南海南部海区前陆盆地形成与演化[J]. 海洋地质与第四纪地质, 2007, 27(1):61-70 doi: 10.16562/j.cnki.0256-1492.2007.01.008
ZHANG Chong, WU Shimin, QIU Xuelin. Formation of foreland basins in the south of the South China Sea [J]. Marine Geology & Quaternary Geology, 2007, 27(1): 61-70. doi: 10.16562/j.cnki.0256-1492.2007.01.008
[41] 朱荣伟, 姚永坚, 刘海龄, 等. 南海西南次海盆两侧陆缘中生代晚期构造接触关系[J]. 地球科学, 2021, 46(3):885-898
ZHU Rongwei, YAO Yongjian, LIU Hailing, et al. Tectonic contact relationship of continental margins of the Southwest Sub-Basin, South China Sea in Late Mesozoic [J]. Earth Science, 2021, 46(3): 885-898.
[42] 谢晓军, 赵志刚, 张功成, 等. 南海南部三大盆地油气地质条件差异性[J]. 地球科学, 2018, 43(3):802-811
XIE Xiaojun, ZHAO Zhigang, ZHANG Gongcheng, et al. Hydrocarbon geological differences of three basins in Southern South China Sea [J]. Earth Science, 2018, 43(3): 802-811.
[43] 张厚和, 赫栓柱, 刘鹏, 等. 万安盆地油气地质特征及其资源潜力新认识[J]. 石油实验地质, 2017, 39(5):625-632 doi: 10.11781/sysydz201705625
ZHANG Houhe, HE Shuanzhu, LIU Peng, et al. New understanding of oil and gas geological characteristics and resource potential in Wan’an Basin [J]. Petroleum Geology & Experiment, 2017, 39(5): 625-632. doi: 10.11781/sysydz201705625
[44] 刘旭明, 张成. 南海南部万安盆地烃源岩成熟史数值模拟研究[J]. 油气地质与采收率, 2011, 18(2):34-37 doi: 10.13673/j.cnki.cn37-1359/te.2011.02.008
LIU Xuming, ZHANG Cheng. Numerical simulation of source rock maturity history in Wan’an basin, Southern South China Sea [J]. Petroleum Geology and Recovery Efficiency, 2011, 18(2): 34-37. doi: 10.13673/j.cnki.cn37-1359/te.2011.02.008
[45] 赵志刚, 刘世翔, 谢晓军, 等. 万安盆地油气地质特征及成藏条件[J]. 中国海上油气, 2016, 28(4):9-15
ZHAO Zhigang, LIU Shixiang, XIE Xiaojun, et al. Hydrocarbon geological characteristics and reservoir forming conditions in Wan'an basin, South China Sea [J]. China Offshore Oil and Gas, 2016, 28(4): 9-15.
[46] 金庆焕, 刘振湖, 陈强. 万安盆地中部坳陷: 一个巨大的富生烃坳陷[J]. 地球科学—中国地质大学学报, 2004, 29(5):525-530
JIN Qinghuan, LIU Zhenhu, CHEN Qiang. The central depression of the Wan’an Basin, South China Sea: A giant abundant hydrocarbon-generating depression [J]. Earth Science—Journal of China University of Geosciences, 2004, 29(5): 525-530.
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