Advertisement

Comparison of Development Effects for Two Different Combined Well Patterns with Horizontal Wells and Vertical Wells

  • Qingyan Xu
  • Rongliang Guan
  • Cong Wu
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

In recent years, horizontal wells have been widely utilized in low-permeability reservoirs in China. Normally, horizontal wells are deployed combined with vertical wells, in which way effective injection-production well network system could be established. However, horizontal wells could be water injectors as well as oil producers and the same is true for vertical wells. The adoption of which kind of combined well pattern has been in dispute for a long time. In response to this issue, a novel physical simulation system is utilized to contrast the development effect of two well patterns with horizontal wells and vertical wells together. By comparing pressure gradient and flow velocity, the better scenario can be selected. If the horizontal well is not fractured, well pattern of horizontal wells as injectors with vertical wells as producers has a remarkable advantage. While the horizontal well is fractured, well pattern of horizontal wells as producers with vertical wells as injectors has a clear advantage. From another perspective to analyze the result, if an oil field needs horizontal well to inject water for vertical wells, then the horizontal well is suggested not to be fractured. If an oil field needs horizontal wells to produce much more oil with vertical injection wells, then horizontal wells with multiple hydraulic fractures could obtain better effect. As a rule of thumb, deployment of horizontal wells as oil producers is more common in oil fields.

Keywords

Horizontal well Vertical well Combined well patterns Development effect comparison 

Notes

Acknowledgements

We sincerely thank the support from National Science and Technology Major Project of China (No. 2011ZX05032 and No. 2011ZX05058). Also, we thank the support from CNPC Project (NO.2016D-4402).

References

  1. 1.
    Cai WB, Li ZM, Zhang XL (2009) Horizontal well fracturing technology for reservoirs with low permeability. Pet Explor Dev 36(1):80–85CrossRefGoogle Scholar
  2. 2.
    Zeng BQ, ChengL S, Li CL (2010) Development of evaluation of fractured horizontal wells in ultra-low permeability reservoirs. Acta Pet Sinica 31(5):791–796Google Scholar
  3. 3.
    Cai XX, Tang H, Zhou K (2010) Pattern optimization of hydraulically fractured horizontal wells in low permeability and thin interbedded reservoirs. Spec Oil Gas Reserv 17(4):72–74Google Scholar
  4. 4.
    Xiong YM, Liu LM, Zhang L (2012) Present status and development comments on horizontal well completion techniques in China. Pet Drill Tech 40(1):1–6Google Scholar
  5. 5.
    Xu X, Liu XW, Yang ZM (2012) An experimental study on single-phase seepage characteristics with a large-scale model made of ultra-low permeability sandstone outcrops. Acta Pet Sinica 33(3):454–458Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Research Institute of Petroleum Exploration and DevelopmentBeijingChina
  2. 2.Daqing No. 1 Drilling Company of Daqing Drilling Ltd.DaqingChina
  3. 3.Research Institute of Petroleum Exploration and Development, Huabei Oilfield BranchRenqiuChina

Personalised recommendations