Oil & Gas Geology ›› 2009, Vol. 30 ›› Issue (2): 215-222.doi: 10.11743/ogg20090213

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Genetic types of the Neogene slope-breaks and their controls on deposition in Huizhou Depression in Pearl River Mouth Basin

Long Gengsheng1, Shi Hesheng1, Wang Yingmin2, Du Jiayuan1, Liu Jun1, Zhang Xiaoyu1, Liu Hao3   

  1. 1. CNOOC Shenzhen Branch, Guangzhou, Guangdong 510240, China;
    2. China University of Petroleum, Beijing 102249, China;
    3. China University of Geosciences, Beijing 100083, China
  • Received:2008-07-26 Online:2009-04-25 Published:2012-01-16

Abstract:

The Neogene in Huizhou Depression were deposited in neritic shelf environment and is gentle in dip.However,a comprehensive study of seismic,drilling,log data indicates that three types of slope-breaks (i.e.deposition breaks,fault breaks and flexural breaks) occur in the area.On the plane,these breaks combine with one another in four patterns,including multistage,diagonal,comb-shaped,and ridge-parallel.Their evolution presents such evident features as inheritance,periodicity,scale grading,and migration cyclicity.Slope-breaks in the north margin and south of the basin control the superimposing pattern of the sequences and the development and spatial distribution of depositional systems.

Key words: shelf slope-break, low stand system tract, stratigraphy, depositional system, Huizhou Depression, Pearl River Mouth Basin

CLC Number: