Lithologic Reservoirs ›› 2020, Vol. 32 ›› Issue (5): 54-62.doi: 10.12108/yxyqc.20200506

• PETROLEUM GEOLOGY • Previous Articles     Next Articles

Sedimentary characteristics and exploration potentials of Lower Cretaceous Xiagou Formation in Ying'er Sag,Jiuquan Basin

WU Qingpeng1, LYU Ximin1, CHEN Juan1, ZHOU Zaihua2, YUAN Cheng1   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China;
    2. Research Institute of Exploration and Development, PetroChina Yumen Oilfield Company, Jiuquan 735019, Gansu, China
  • Received:2019-12-30 Revised:2020-04-07 Online:2020-10-01 Published:2020-08-08

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Abstract: In order to explore a new field for oil & gas exploration in Ying'er Sag,the sedimentary characteristics of Xiagou Formation in Ying'er Sag were studied based on the analysis of sedimentary settings,core observation,grain size,well logging,seismic attributes and reservoir prediction. The results show that:A new type of turbidite sand body is developed in the upper Xiagou Formation of Ying'er Sag. The turbidite which is controlled and triggered by the synsedimentary fault can be identified as a deposition of the off-shore subaqueous fan facies. The turbidites in this area are synsedimentary fault-related,small in individual size but large in groups. The discovery of turbidites can further expand the area of lithologic reservoir exploration in Ying'er Sag. It lays a solid foundation for hydrocarbon exploration in the low position of structure and sags which are similar to Ying'er Sag.

Key words: turbidite, sedimentary characteristics, distribution regularity, reservoir prediction, Ying'er Sag

CLC Number: 

  • TE121.3
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