西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

莺歌海盆地DF13 区黄流组沟道砂体特征研究

陈志宏1,2,陈殿远2,应明雄2   

  1. 1. 中国地质大学(武汉)资源学院,湖北武汉430074
    2. 中海石油(中国)有限公司湛江分公司,广东湛江524057
  • 出版日期:2014-02-01 发布日期:2014-02-01
  • 基金资助:

    国家科技重大专项(2011ZX05023–004)。

Study on Characteristic of the Sand Bodies of Huangliu Formation in DF13
Area,Yinggehai Basin

Chen Zhihong1,2, Chen Dianyuan2, Ying Mingxiong2   

  1. 1. Faculty of Earth Resources,China University of Geosciences(Wuhan),Wuhan,Hubei 430074,China
    2. Zhanjiang Branch,China National Offshore Oil Corporation(China),Zhanjiang,Guangdong 524057,China
  • Online:2014-02-01 Published:2014-02-01

摘要:

莺歌海盆地晚中新统黄流组浅海厚层泥岩中发育的块状厚层粉细砂岩是近期天然气勘探热点,其储集砂体纵向
多期叠置、横向变迁快。构造演化及古沉积背景控制了黄流组内三级层序格架的分布及演化,但未控制沉积体系或储集
砂体的分布。该沉积体系与经典海底扇相比,没有明显的扇体亚相分异、主水道和天然堤等典型沉积特征,而为规模小、
迁移快、堆积厚的沟道沉积砂体组合,将其定义为“非典型”重力流,用不同类型沟道+ 漫流体系来表征其特点。不稳定
陆坡背景通过古地貌形态和物源供给样式来控制四级层序砂体分布规律,按沟道沉积水动力特征及堆积样式进一步划分
为充蚀沟道、迁移沟道和充填构造,其中充蚀沟道和充填沟道储集条件好,是有利的勘探目标。

关键词: 沟道体系, 控制因素, 砂体特征, 黄流组, 莺歌海盆地

Abstract:

The massive fine-grained sandstone developed from the thick mudstone lager powder of late Miocene deposits in
shallow yellow stream group in Yingge Sea Basin is the recent gas exploration hotspot. The reservoir is sand vertically stacked
multi-stage,and changes fast horizontally. Though tectonic evolution and ancient deposition setting control the distribution and
evolution of third-order sequences framework within Huangliu Formation,they do not control the distribution of depositional
systems or reservoir sand bodies. Compared with the classic submarine fan phase,typical deposition characteristics can hardly
be found in this depositional system like obvious fan body sub-phase differentiation,main waterway,levee,etc. It is considered
as a channel sand bodies’ combination of small-scale,fast migration,and thick accumulation. In the article,it is called
non-typical Turbidity current,using different channels + spring current to show this sedimentary characteristic. The studies
suggest that the unstable continental slope setting controls the distribution of sand bodies in four-order sequences by means of
controlling the Palaeogeomorphology and sedimentary source rechargement. According to the hydrodynamic characteristics
and accumulation styles of the channel deposition,the sand bodies are further divided into the sub-erosion channel,migration
channel and filling structure. Among them sub-erosion channel and filling structure have good reservoir conditions,that can
be new gainful exploration targets.

Key words: channel system, controlling factor, sand bodies characteristic, Huangliu Formation, Yingge Sea Basin