西南石油大学学报(自然科学版)

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The Continental Incised Valley Filling Architecture in#br# Qinhuangdao H Oilfield,Bohai Bay

Chen Fei1*, Hu Guangyi1, Fan Ting′en1, Sun Lichun1, Zhao Chunming2#br# 1. CNOOC   

  1. 1. CNOOC Research Institute,Chaoyang,Beijing 100028,China
    2. Tianjin Branch of CNOOC Limited,Tanggu,Tianjin 300452,China
  • Online:2015-10-01 Published:2015-10-01

Abstract:

The continental incised valley is a kind of U topography with strong erosion,and filling sandbody is good reservoir.
According to the analysis of cores,seismic interpretation and well-logging,the authors have thoroughly studied the sedimentary
facies characters of the Neogene Minghuazhen Formation of Qinhuangdao H oilfield in the Bohai Bay Basin with grain size
analysis and a great deal of laboratory testing data. The authors propose that the sedimentary facies type of NmII and NmIV of
Minghuazhen Formation lies incised valley. Detailed studies have been made on the rock types and sedimentary structures of
incised valley,and relevant sedimentary models have been established. Incised valley water power suddenly increased,which
is dominated by medium and fine sandstone,grain size is relatively big. The sandbody transports on certain direction,cutting
and stacking each other,which presents the imbricated structure. The study demonstrates that the falling of relative lacustrine
level and the strong hydrodynamic conditions are the major causes of incised valley.

Key words: Bohai Bay Basin, Qinhuangdao H Oilfield, Minghuazhen Formation, incised valley, filling architecture

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