琼东南盆地新生代东西分块差异构造演化及控藏意义

王真真, 朱继田, 李安琪, 胡潜伟, 毛雪莲, 尹宏伟. 琼东南盆地新生代东西分块差异构造演化及控藏意义[J]. 海洋地质与第四纪地质, 2021, 41(4): 157-169. doi: 10.16562/j.cnki.0256-1492.2020072401
引用本文: 王真真, 朱继田, 李安琪, 胡潜伟, 毛雪莲, 尹宏伟. 琼东南盆地新生代东西分块差异构造演化及控藏意义[J]. 海洋地质与第四纪地质, 2021, 41(4): 157-169. doi: 10.16562/j.cnki.0256-1492.2020072401
WANG Zhenzhen, ZHU Jitian, LI Anqi, HU Qianwei, MAO Xuelian, YIN Hongwei. Differential control of structures over reservoirs and its significance in Qiongdongnan Basin[J]. Marine Geology & Quaternary Geology, 2021, 41(4): 157-169. doi: 10.16562/j.cnki.0256-1492.2020072401
Citation: WANG Zhenzhen, ZHU Jitian, LI Anqi, HU Qianwei, MAO Xuelian, YIN Hongwei. Differential control of structures over reservoirs and its significance in Qiongdongnan Basin[J]. Marine Geology & Quaternary Geology, 2021, 41(4): 157-169. doi: 10.16562/j.cnki.0256-1492.2020072401

琼东南盆地新生代东西分块差异构造演化及控藏意义

  • 基金项目: 国家科技重大专项“大型油气田及煤层气开发”子课题“莺琼盆地高温高压天然气富集规律与勘探开发关键技术”(2016ZX05024-005)
详细信息
    作者简介: 王真真(1988—),女,硕士,工程师,主要从事石油天然气地质综合研究工作,E-mail:wangzhzh19@cnooc.com.cn
  • 中图分类号: P736.1

Differential control of structures over reservoirs and its significance in Qiongdongnan Basin

  • 运用构造解析方法,通过精细地震资料解释和断层活动性分析,对琼东南盆地东西分块差异构造演化特征及其构造控藏差异进行了深入研究。根据区域构造差异,首次厘定了松南凹陷与宝岛凹陷边界,并分析认为该边界为琼东南盆地东西区分块差异构造演化边界。以此为界,盆地西区以北东构造走向为主,以发育大型简单铲式断层控制的大型地堑、半地堑凹陷为特征;盆地东区以近东西构造走向为主,以发育Y字型断层、铲状及板状阶梯断层控制的大型地堑、复式地堑为特征。综合分析认为,琼东南盆地东西分块差异构造演化的主控因素主要有三点:限制性边界条件、地壳结构与热流差异、差异构造地质因素。限制性边界条件差异与区域构造应力场转换是控制盆地东西分块断裂时空差异的主控因素,而地壳结构与热流差异和差异构造地质因素最终加剧了盆地东西区差异演化。在此基础上,开展了琼东南盆地深水区构造差异控藏综合研究,主要包括烃源岩、沉积体系及成藏区带差异研究,认为深水西区凹陷半地堑结构窄深,以发育海陆过渡相及陆源海相烃源岩类型为主,烃源岩埋深大,热演化程度高,生排烃时间晚,成藏层系以新近系重力流沉积为主,受半地堑凹陷结构控制主要发育3个成藏区带:陡坡带沟源断层垂向运移成藏区带、中央带高压底辟裂隙垂向运移成藏区带和缓坡带侧向运移成藏区带,以前两种成藏区带最优。深水东区(复式)地堑结构宽浅,以发育陆源海相烃源岩类型为主,烃源岩埋深浅,热演化程度中等,生排烃时间早,成藏层系以前古近系潜山及古近系三角洲海陆过渡相沉积为主,受地堑结构控制对称发育4个成藏区带:南北部凸起区断-砂-脊复合疏导格架侧向运移成藏区带和两侧近凹断阶带断层垂向运移成藏区带,这4四个区带成藏条件有利,均有油气发现,应为下步勘探重点领域。

  • 加载中
  • 图 1  琼东南盆地构造单元与深水油气田分布图

    Figure 1. 

    图 1 

    图 2  松南凹陷与宝岛凹陷转换带基底断裂分布图

    Figure 2. 

    图 3  琼东南盆地莫霍面埋深构造图

    Figure 3. 

    图 4  琼东南盆地地表热流分布图

    Figure 4. 

    图 5  限制性边界条件断裂展布物理模拟实验

    Figure 5. 

    图 6  琼东南盆地不同走向断裂渐新世活动速率直方图

    Figure 6. 

    图 7  琼东南盆地已钻井罐顶气甲苯-苯组分含量交汇图版

    Figure 7. 

    图 8  宝岛-长昌凹陷中央轴向海底扇典型地震剖面

    Figure 8. 

    图 9  琼东南盆地宝岛-长昌凹陷陵水组沉积相平面图

    Figure 9. 

    图 10  琼东南盆地陵水凹陷成藏模式图

    Figure 10. 

    图 11  长昌凹陷地质与预测油气藏模式图

    Figure 11. 

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出版历程
收稿日期:  2020-07-24
修回日期:  2020-12-24
刊出日期:  2021-08-28

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