岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 218–224.doi: 10.3969/j.issn.1673-8926.2015.05.035

• 油气地质 • 上一篇    下一篇

深水交互作用沉积研究进展----以南海北部珠江口盆地为例

李 华1,2,3,何幼斌1,2,3,王英民4,裴 羽2,3   

  1.  1. 长江大学 沉积盆地研究中心,武汉 430100 ; 2. 长江大学 油气资源与勘探技术教育部重点实验室,武汉 430100 ; 3. 长江大学 地球科学学院,武汉 430100 ; 4. 中国石油大学(北京) 地球科学学院,北京 102249
  • 出版日期:2015-09-26 发布日期:2015-09-26
  • 作者简介:李华( 1984- ),男,博士,讲师,主要从事沉积学的教学与科研工作。 地址:( 430100 )湖北省武汉市蔡甸区大学路 111 号。 E-mail :hli@yangtze.edu.cn 。
  • 基金资助:

    国家自然科学基金“深水单向迁移水道的成因机理及其内的浊流、内潮流与等深流交互作用研究”(编号: 41372115 )、“鄂尔多斯盆地西南缘中奥陶统等深流沉积及其主控因素研究”(编号: 41472096 )及“鄂尔多斯盆地西南缘中奥陶统重力流与等深流交互作用沉积研究”(编号: 41502101 )联合资助

Research advances in deep water interaction deposition : A case from the Pearl River Mouth Basin, northern South China Sea

Li Hua123, He Youbin123, Wang Yingmin4, Pei Yu23   

  1.  1. Research Center of Sedimentary Basin , Yangtze University , Wuhan 430100 , China ; 2. Key Laboratory of Exploration Technologies for Oil and Gas Resources , Ministry of Education , Yangtze University , Wuhan 430100 , China ; 3. School of Geoscience , Yangtze University , Wuhan 430100 , China ; 4. College of Geosciences , China University of Petroleum , Beijing 102249 , China
  • Online:2015-09-26 Published:2015-09-26

摘要:

深水区水动力条件复杂多样,重力流、等深流与内波及内潮汐等作用均显著,其相互作用明显,并形成丰富多样的沉积体。 根据地震资料,对南海北部珠江口盆地重力流与等深流交互作用沉积的类型、特征及沉积模式进行了研究。研究区重力流与等深流极其活跃,发育典型的重力流与等深流交互作用沉积,包括峡谷、单向迁移水道、大型长条状漂积体、限制型漂积体及陆坡席状漂积体等。 中上陆坡区发育北东向迁移水道、大型长条状漂积体及少量陆坡席状漂积体,为重力流与北东向运动的中层水等深流共同作用区。中下陆坡区发育南西西向迁移水道、朵叶、水道-堤岸、大型长条状漂积体、限制型漂积体及陆坡席状漂积体等,重力流与深层水等深流作用明显。 重力流与等深流交互作用可形成单向迁移水道,迁移方向与等深流运动方向相同。等深流可对重力流沉积物进行搬运、改造、再沉积并形成漂积体、偏转型的朵叶和不对称堤岸。

关键词: 拉东变换, 多次波衰减, 陆上地震数据

Abstract:

There are complicated and various hydrodynamic forces in deep water zone, which result in abundant types of interaction depositions, such as gravity flow, contour current, internal wave and so on. Types, characteristics and sedimentary models of interaction deposition between gravity flow and contour current were studied in the Pearl River Mouth Basin by seismic data. Gravity flow and contour current are both well active in the study area, where interaction deposition between gravity flow and contour current developed well, including canyon, unidirectional migrating channel, giant elongated drift, confined drift, slope sheeted drift and so on. NE-migrating channel, giant elongated drift and some slope sheeted drift formed in the upper-middle slope, where the gravity flow and northeastward moving intermediate water were active. By contrast, SWW-migrating channel, lobe, channel-levee, giant elongated drift, confined drift and slope sheeted drift developed for gravity flow and deep water controlling in the middle-lower slope. The unidirectional migrating channel is the result from interaction between gravity flow and contour current, whose migrating direction represents the flow direction of contour current. Drift, deflected lobe and asymmetric levee formed by contour current carry, rework and redeposit of gravity flow sediment.

Key words:  Radon transform , multiple attenuation, land seismic data

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