西南石油大学学报(自然科学版)

Previous Articles     Next Articles

Sequence Stratigraphy and Evolution of Sedimentary Facies of
Upper Perma in Jiannan Area

Yang Wei1,2, Hu Mingyi1,2, Gao Yan3   

  1. 1. MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Wuhan,Hubei 430100,China
    2. Faculty of Earth Science,Yangtze University,Wuhan,Hubei 430100,China
    3. Xinjiang Oilfield Company,CNPC,Karamay,Xinjiang 834000,China
  • Online:2014-04-01 Published:2014-04-01

Abstract:

Based on previous researches of sedimentary structure of Changxing Formation,and combining with reorganization
of sequence boundary,logging and lithology data,Changxing Formation in Jiannan Area has been divided into two three-order
sequences and five fourth-order sequences,the development of reservoir and transverse distribution of sedimentary facies within
fourth-order sequence in Changxing Formation have been studied in this paper. According to the calibration of fourth-order
sequence on seismic section and time-slice map of strata,taking system tract of fourth-order sequence as mapping unit,the
evolution of sedimentary facies is also discussed. The results indicate that the lower three-order sequence experienced three
times relative fall of sea level,the organic reef and bank mainly developing in the stage of HST;in the upper three-order
sequence,exposed organic bank with lithology of dolomite is widely distributed,but the scale is smaller than that of lower
three-order sequence and the distribution range moves to the central part of study area gradually.

Key words: Jiannan Area, Changxing Formation, sequence stratigraphy, isochronous strata slicing, sedimentary facies evolution