Oil & Gas Geology ›› 2008, Vol. 29 ›› Issue (4): 466-470.doi: 10.11743/ogg20080408

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Analysis on the sequence stratigraphic framework and its forming mechanism of the first member of Yaojia Formation in the North Songliao Basin

Hou Yanping1,2, Ren Jianye1, Ren Yanguang2, Zhuang Xinguo1, Wang Yafeng2   

  1. 1. Faculty of Earth Resources, China University of Geosciences, Wuhan, Hubei 430074;
    2. Exploration and Development Research Institute of PetroChina Daqing Oilfield Limited Company, Daqing, Heilongjiaag, 163712
  • Received:2008-05-29 Online:2008-08-24 Published:2012-01-16

Abstract:

A sequence stratigraphic framework is established for the first member of Yaojia Formation in northern Songliao Basin by using seismic,log,core and paleontologic data.Three fourth-order retrograding sequences are recognized in the first member of Yaojia Formation.They are in unconformable contact with the underlying Qingshankou Formation,indicating that the Songliao Basin experienced transient uplifting during the early deposition of the first member of Yaojia Formation before subsiding and receiving deposits once again and getting larger in lake basin area.The first member of the Yaojia Formtion was deposited in ca.88-87Ma when restructuring occurred in the Pacific plate.An analysis of the sequence stratigraphic framework and its forming mechanism demonstrates that compression initiated in the basin during the deposition of the first member of Yaojia Formation and its sequence stratigraphic framework was a result of this plate restructuring event.

Key words: restructure of the Pacific Plate, sequence stratigraphic framework, first member of the Yaojia Formation, North Songliao Basin

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