How to Strengthen and Stabilize the Wellbore during Drilling ...

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Design of Hoop Stress Enhancement • Fracture Width required to achieve desired wellbore pressure – elastic model: ‣ Desired Equiv. Circ. Density, or Wellbore Pressure ‣ Rock Properties – Poisson’s Ratio, Young’s Modulus, Minimum Horizontal Stress (or Fracture Gradient) ‣ Well Geometry – Depth, Inclination, Hole Size • Acceptable types of WSM • WSM particle size distribution (PSD) and concentration 24
Acceptable Large, Tough and Granular 25
Page 1 and 2: Primary funding is provided by The
Page 3 and 4: Presentation Outline ‣ The Lost C
Page 5 and 6: The Lost Circulation Problem • Es
Page 7 and 8: Tier I. Best Current or New ‣ Acc
Page 9 and 10: Tier II. which Minimize Losses: WBM
Page 11 and 12: Managing Lost Circulation: A 4-Tier
Page 13 and 14: Managing Lost Circulation: A 4-Tier
Page 15 and 16: Strategies for Strengthening the We
Page 17 and 18: Fracture Closure Stress • High-fl
Page 19 and 20: Fracture Closure Stress As the slur
Page 21 and 22: Hoop Stress Enhancement As fracture
Page 23: Hoop Stress Enhancement Application
Page 27 and 28: Continuous Addition of to whole mud
Page 29 and 30: eepwater Case History Gulf of - Mex
Page 31 and 32: Summary The 4-tier strategy for man

How to Strengthen and Stabilize the Wellbore during Drilling ...

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