西南石油大学学报(自然科学版)

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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

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