Carbonates and Evaporites

, Volume 33, Issue 3, pp 517–533 | Cite as

Amplitude calculation of the end-Permian sea level drop in Northeastern Sichuan Basin, China

  • Rui Zhao
  • Jiahui Zhao
  • Yang Li
  • Yu Liang
  • Yasheng WuEmail author
  • Enguang Qi
Original Article


An extensive unconformity surface has been reported on top of the Changxing Formation in northeastern Sichuan Basin, which was formed by the end-Permian sea level drop globally. The amplitude of sea level change has never been studied in Changxing Formation, however, this is a problem of vital importance in petroleum exploration. Logging curves of boreholes located in Longgang, Puguang and Yuanba areas are used to analyze the intensity of karst, which can be used to represent the amplitude of sea level drop. Four, two and two logging phases are identified in Longgang, Yuanba and Puguang areas, respectively, which indicate different combinations of sedimentary facies and diagenesis features. By analyzing the thickness of karst formations in the studied sections, the amplitudes of sea level drop are identified in different areas. Combined with karst features reflected from Permian Panlongdong Outcrop, the amplitude of end-Permian sea level drop is at least 190 m in Sichuan Basin.


Changxing Group Karst Amplitude of sea level drop Boreholes Well logging Logging phase 


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Rui Zhao
    • 1
  • Jiahui Zhao
    • 5
  • Yang Li
    • 2
  • Yu Liang
    • 3
  • Yasheng Wu
    • 2
    Email author
  • Enguang Qi
    • 4
  1. 1.Research Institute of Exploration and Production, SINOPECBeijingChina
  2. 2.Key Laboratory of Petroleum Resources Research, CAS, Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina
  3. 3.Shanghai Branch of China National Offshore Oil Corporation (China) LtdShanghaiChina
  4. 4.MOE Key Laboratory of Petroleum EngineeringChina University of Petroleum (Beijing)BeijingChina
  5. 5.State Key Laboratory of Petroleum Resources and ProspectingChina University of Petroleum (Beijing)BeijingChina

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