JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2009, Vol. 39 ›› Issue (3): 111-114.

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Research on the wellbore stability model coupled mechanics and chemistry

  

  1. ZHANG Le-wen,QIU Dao-hong:Geotechnical & Structure Engineering Center, Shandong University, Jinan 250061, China; CHENG Yuan-fang:Engineering Department of Petroleum, University of Petroleum of China, Dongying 257061, China
  • Received:2009-01-31 Online:2009-06-16 Published:2009-06-16

Abstract:

Based on the poroelasticity theory and seepage mechanics, the  wellbore stability model coupled mechanicschemical effect for shale formation was put forth. Rules about activity of drilling fluids and membrane efficiency affecting on wellbore collapse pressure were obtained by the model, which could offer the theoretical basis for research on wellbore stability.

Key words: membrane efficiency; pore pressure; model coupled mechanics and chemistry; shale formation

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