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

More documents

Recommendations

Info

The Lost Circulation Problem: High-Risk Operations Fractured Wellbore Pressure Gradient / Mud Density Frac Gradient Mud Weight Stable Wellbore Collapsed Wellbore Mud Weight Weak zone (depleted) 0 30 60 90 Well Inclination Deviated Wellbores Pore Pressure Depleted Zones Deep Water
The Lost Circulation Problem • Estimated industry cost in the Gulf of Mexico: $1 billion/yr. Worldwide: ~ $ 2 to 4 billion/yr. • On average, 10-20% of the total cost of drilling an HTHP well is expended on mud losses (U.S. Department of Energy). • No consistent approach to manage lost circulation. • Nearly 200 products offered by 50 drilling fluid companies to control lost circulation. A comprehensive Lost Circulation mitigation and prevention program is required. 5
Page 1 and 2: Primary funding is provided by The
Page 3: Presentation Outline ‣ The Lost C
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 and 24: Hoop Stress Enhancement Application
Page 25 and 26: Acceptable Large, Tough and Granula
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 ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?