Advertisement

Key Technology and Application of Thin-Bedded Tight Sandstone Gas Reservoir in Horizontal Well Development

  • Xiaoning Wu
  • Jinbu Li
  • Zhongjun Zhao
  • Jianpeng Jia
  • Peng Du
  • Kefeng Hou
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

The gas host intervals of the eighth member, Permian Shihezi Formation, in the Sulige gas field are characterized by a thin strata thickness, low porosity and permeability, and high heterogeneity, resulting in poor continuity and connectivity of the sandstone bodies. These collectively lead to a low vertical well production rate, a challenge that needs to be improved imperatively. Here, technical options are studied and innovated in the horizontal pilot development, seeking for a solution package including horizontal well development, design, geo-steering, rapid drilling, and fracturing treatment to improve individual well production rate. The application of this solution package has successfully guided the deployment of the well location, optimized the well track, and increased the individual well production rate. In 2016, the horizontal wells had reached the number of 59, the average length of horizontal interval is 1211 m, the actual average sand ratio drilled along horizontal well is 60.2%, and the average open-flow capacity is 4.87 million m3 per day, three times more than the vertical wells. When we talk about tight sandstone gas reservoir, it is of variety definitions. According to The Federal Energy Regulatory of the United State, it is defined as the in situ permeabilities to gas are generally less than 0.1 millidarcy (md) and porosity ranges from 3 to 12%. This has been the most widely popularized definition. Experimental data of the Sulige gas field suggest that the permeabilities of the regular conditions are about 10 times more than those in situ, indicating a tight gas reservoir. It has been found that the development of the horizontal well is facing the problem of low effective thickness and small single sandbody. Efforts will be concentrated on tackling the key technology such as horizontal well development, horizontal well design, geo-steering, rapid drilling, and fracturing treatment to improve the individual well production rate.

Keywords

Thin layer Tight sandstone Horizontal well Development Key technology 

Notes

Acknowledgements

This paper is supported by the Fund of China National Science and Technology Major Project named development of large low-permeability lithologic reservoir in Ordos Basin (No. 2016ZX05050).

References

  1. 1.
    Law BE (1986) Geologic characterization of low-permeability gas reservoirs in selected wells, Greater Green River Basin, Wyoming, Coloradoand Utah. AAPG Stud Geol 24:253–269Google Scholar
  2. 2.
    Holditch SA (2006) “Tight gas sands” paper SPE 103356. J Petr Technol 58(6):86–93CrossRefGoogle Scholar
  3. 3.
    Luo D, Zhong G, Du J et al (2015) Spreading sand body of single layer and its application in horizontal well of the 8th Member of he 8 in Sulige gas field. J Xi’an Univ Sci Technol 35(2):221–228Google Scholar
  4. 4.
    Yang H, Wei X (2007) New progress achieve by natural gas exploration in Sulige area. Nat gas Ind 27(12):6–11Google Scholar
  5. 5.
    He Z, Fu J, Xi S et al (2003) Geological features of reservoir formation of Sulige gas field. Acta Petr Sin 24(2):6–12Google Scholar
  6. 6.
    Ding X, Kang R, Han H et al (2014) Tignt sand gas accumulation for the 8 the layer in eastern Ordos Basin. J Xi’an Univ Sci Technol 34(4):426–432Google Scholar
  7. 7.
    Yang H, Fu J, Liu X et al (2002) Formation conditions and exploration technology of large-scale tight sandstone gas reservoir in Sulige. Acta Petr Sin 33(1):27–36Google Scholar
  8. 8.
    Zhang M, Da S, Chen T (2002) Diagenesis and pore evolution of p1h8 reservoir in Sulige gas field. Nat Gas Ind 22(6):13–16Google Scholar
  9. 9.
    Li L, Yuan Z, Hui K et al (2000) Accumulation regularity of upper paleozoic gas in north Ordos basin. Oil Gas Geol 21(3):268–271Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Xiaoning Wu
    • 1
    • 2
  • Jinbu Li
    • 1
    • 2
  • Zhongjun Zhao
    • 1
    • 2
  • Jianpeng Jia
    • 1
    • 2
  • Peng Du
    • 1
    • 2
  • Kefeng Hou
    • 1
    • 2
  1. 1.Research Center of Sulige Gasfield, PetroChina Changqing Oilfield CompanyXi’anChina
  2. 2.National Engineering Laboratory for Exploration and Development of Low Permeability Oil, & Gas FieldsXi’anChina

Personalised recommendations