China Petroleum Exploration ›› 2018, Vol. 23 ›› Issue (2): 59-68.DOI: 10.3969/j.issn.1672-7703.2018.02.008

• PETROLEUM GEOLOGY • Previous Articles     Next Articles

Practice and prospect of geology-engineering integration technology in the efficient development of shale gas in Weiyuan block

Liu Naizhen1, Wang Guoyong1, Xiong Xiaolin2   

  1. 1 CNPC Greatwall Drilling Company;
    2 Sichuan Shale Gas Department, CNPC Greatwall Drilling Company
  • Received:2017-11-16 Revised:2018-02-11 Online:2018-03-15 Published:2018-03-16
  • Supported by:
     

Abstract: The shale gas reservoir in Weiyuan block is characterized by complex surface condition, deep buried depth, complex structure, strong heterogeneity and difficult fracturing stimulation. To deal with these difficulties, a series of technologies and measures are adopted. First, the development concept of "integration, industrialization and efficiency" is followed firmly, and the geology-engineering integration technology is adopted to confirm plane and vertical sweet spots and optimize the well design. Second, accurate geosteering is realized to increase the drilling rate of sweet spots greatly. Third, the quality of drilling engineering is improved so as to shorten the drilling cycle effectively and reduce the incidence of complex downhole conditions. Fourth, the fracturing process design is optimized to maximize the fracturing volume. And thus, the relatively perfect integration model of project management, research design, field research, geological drilling and geological fracturing which can be well used as the reference for the exploration and development of shale gas in the setting of complex marine is formed, the single well production is increased continuously, the single well cost is reduced steadily, and shale gas in Weiyuan block is developed effectively in the large scale. Next, it is necessary to practice and complete the geology-engineering integration technology continuously, deepen geological cognition and strengthen the support engineering technologies so as to realize the efficient development of shallow shale gas reservoirs above 3500 m and the profitable development of deep shale gas reservoirs in Weiyuan block.

 

Key words: geology-engineering integration, shale gas in Weiyuan block, integration model, practice, prospect

CLC Number: