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E-426 - Geomechanics for Drilling Operations

3 days FOR/GEOME
Level
Proficiency
Audience
  • Engineers and supervisors involved in drilling and completion operations.
Purpose
  • This course provides an understanding of geomechanics solutions for mitigating and solving drilling problems.
Learning Objectives
  • Upon completion of the course, participants will be able to:
  • acquire the basic knowledge on geomechanics applied to drilling and completion operations,
  • grasp through case studies some important drilling and wellbore issues with regard to geomechanics.
Prerequisite
  • No prerequisites for this course.
Ways and means
  • Training includes application exercises designed for drilling.

SCOPE OF ROCK MECHANICS 0.25 day
  • What is geomechanics? Why geomechanics?
  • Geomechanics applications - Geomechanics limitation.
INTRODUCTION TO ROCK MECHANICS 0.75 day
  • Stress - Strains.
  • Rock failure criteria - Mohr circle application.
  • Effect of pore pressure and temperature on rock failure application.
STRESS DISTRIBUTION AROUND THE WELLBORE: CASE OF COMPACT ROCKS 1 day
  • Stress expression: case on an isotropic and anisotropic stress fields.
  • Effect of pressure in the well and the temperature on the stresses.
  • Different modes of failure.
  • Stability diagram.
PORE & FRACTURATION DETERMINATION 0.5 day
  • Underground stresses - Geostatic pressure.
  • Pore pressure estimation: ratio, equivalent depth, Eaton method.
  • Fracturation pressure estimation: calculation, LOT.
APPLICATION 0.5 day
  • Anisotropy effect on wellbore.
  • Effect of mud weight, bore hole temperature, wellbore trajectory.