Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (2): 598-607.doi: 10.13278/j.cnki.jjuese.20200012

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Fine Portray of Thin Sand-Bodies and Trajectory Design of Horizontal Well in Zhaoyuan Area

Chen Shoutian, Wu Yujin, Fu Xichun, Zhang Wenlong, An Zhaohui, Cong Peihong   

  1. Daqing Geophysical Research Institute, BGP Inc, Daqing 163357, Heilongjiang, China
  • Received:2020-01-03 Online:2020-03-26 Published:2020-03-31
  • Supported by:
    Supported by Scientific Research and Technology Development Project of China National Petroleum Corporation(110012334004001)

Abstract: The sand-bodies of Fuyu reservoir in Songliao basin are thin in thickness, unstable in distribution, and great in lateral variation. To accurately identify and characterize the spatial distribution of single-layer sand-bodies and rationally and effectively design the drilling trajectory of horizontal wells are the keys to ensure the effective development of horizontal wells. By using pre-stack phased inversion,multiple inversion,and constrained sliding thresholds by encrypted isochronous frames,the thin sand-bodies are finely characterized. In consideration with the characteristics of the sand body of Fuyu oil layer in this area, combined with the structural fractures and the distribution of thin sand-bodies,the authors design the horizontal well trajectories through the reference wells to determine the encountered sand-bodies and their petroleum-bearing property, and the sandstone encounter rate of horizontal wells is 99.5%.

Key words: thin sand-bodies, phase-controlled inversion, design of horizontal well trajectory, Fuyu Formation, Zhaoyuan area

CLC Number: 

  • P631
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