Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (1): 42-46.doi: 10.3969/j.issn.1673-8926.2011.01.006

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Analysis of sequence stratigraphic framework and model of Badaowan Formation in Bohu Depression of Yanqi Basin

HUA Caixia， LI Xiaogang， ZANG Suhua   

  1. College of Energy Resources， Chengdu University of Technology， Chengdu 610059， China
  • Online:2011-02-20 Published:2011-02-20

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Abstract:

The principle of sequence stratigraphy and line drawing method of seismic-reflection profile are applied to establish the sequence stratigraphic framework of Jurassic Badaowan Formation in Bohu Depression of Yanqi Basin. The Badaowan Formation is divided into three third-order sequences, including SQ1, SQ2 and SQ3 from base to top, of which the stratigraphic framework characteristics are analyzed respectively. The sequence stratigraphic model is established and the direction of oil and gas exploration is indicated. The research result shows that the LST is generally not developed widely in those three sequences within the Badaowan Formation, while the TST and HST are well developed; the depositional systems are mainly braided river delta, fan delta and lacustrine deposit and their distributions are mainly controlled by the morphology of the basin.

Key words: organic matter abundance, log response, maturity, Western Sag in Liaohe Basin

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