Earth Science Frontiers ›› 2009, Vol. 16 ›› Issue (6): 104-112.

• Article • Previous Articles     Next Articles

Well site selecting, core section characteristics and distribution of the special lithological layers in CCSDSKIn borehole, Songliao Basin.

GAO Wei-Feng, WANG Cheng-Shan, WANG Pu-Jun, MO Xiao-Qiao, LIN Yan-An, CHENG Ri-Hui, WANG Guo-Dong   

  1. 1College of Earth Sciences, Jilin University, Changchun 130061, China
    2School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China
    3Institute of Exploration and Development of Daqing Oilfield Company Ltd. Daqing 163712, China
  • Received:2009-10-20 Revised:2009-11-01 Online:2009-12-16 Published:2009-12-01

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Abstract:

CCSDSKIn borehole (China Cretaceous Continental Scientific DrillingSongkeⅠ—the north borehole) is the north one of the two drilling wells of the Cretaceous Scientific Drilling Project in Songliao Basin. It is located in Talaha syncline in Gulong sag of center depression, north Songliao Basin. Based on the detailed description of the cores from the Taikang Formation to the first member of the Nenjiang Formation in CCSDSKIn borehole, we have established the core section and identified five special lithological layers, including dolomite, volcanic ash, oil shale, lime mudstone and marl. The total number of special lithological layers is 73 with total thickness of 708 m. They distribute in the second to the fifth member of the Nenjiang Formation and the second member of the Mingshui Formation. The detailed description of the cores from CCSDSKIn borehole and the identification of special lithological layers will benefit the further studies.

Key words: CCSDSKIn borehole; continental Cretaceous; scientific drilling; core description; core section; special lithological layer