Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (6): 1608-1619.doi: 10.13278/j.cnki.jjuese.201506105

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Three-Dimensional Geosteering Technology for Horizontal Wells in Sulige Gasfield A Case from Braided River Reservoir of the He8 Group

Chang Sen1,2, Luo Jinglan2, Fu Xiaoyan2,3, Du Zhiwen1, Zhang San2,3, Du Xiaohua1   

  1. 1. The Fifth Gas Production Plant, Changqing Oilfield Company, PetroChina, Xi'an 710018, China;
    2. State Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi'an 710069, China;
    3. Research Institute of Exploration and Development, Changqing Oilfield Company, PetroChina Xi'an 710018, China
  • Received:2015-03-29 Published:2015-11-26

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Abstract:

The discussion on three-dimensional geosteering technology for the horizontal wells in Sulige gasfield provides some new ideas and technology for the development of large-scale horizontal wells. The analysis of horizontal well three-dimensional geosteering technology is carried out through obtaining true dip via three dimensional comparison with apparent dip in two-dimensional, precise strata correlation,and reservoir distribution, recognizing the braided river facies of micro-facies and characteristics, and analyzing the regional geological background and distribution of sand bodies. The He8 Group braided river sub-facies mainly include channel-filling, channel bar, abandoned channel, overbank deposit. Based on the analysis of sedimentary microfacies, the three-dimensional geosteering technology can effectively guarantee the horizontal drill encounter rate. The three-dimensional geosteering technology is developed based on three dimensional comparison, sedimentary microfacies scale, and their characteristics. It can expand and extend the development of the horizontal well geosteering methods and techniques,and effectively promote its application.

Key words: horizontal well, reservoir correlation, three-dimensional geosteering, geological model, Sulige gasfield

CLC Number: 

  • P618.130.21

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