Overview:
- Drilling program continues to evolve
– New techniques
– Fit-for-purpose technologies
- Pad design represents step-change in regional reservoir development
– Incorporates lessons learned in offshore environments
– Collision risks and associated costs reduced
– Multiple wells from single-well footprint yields better project economics
Obstacles to Production
- Topographical features limiting:
• Surface hole locations
• Water disposal and supply
- Roads restricted to heavy equipment
- Limited pipeline capacity
- Limited drill site options
- Multi-well pad drilling required
Proactive Multiwell Pad Design
- Seven pairs of wells in Marcellus and Other
- Pad designed to minimize risk of well collisions
- Contractor/Operator agreed on Anticollision Standard
• Areas of uncertainty defined for 1,000, 2,500 & 5,000-ft TVDs
• Detailed surveying program
- North Seeking Gyro used to maximum 20° inclination
- MWD used once sensors are free of external magnetic interference
....
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Pad Design Key For Marcellus Drilling
Robert Kuntz et. al. - General Energy, Schlumberger, Apache Corporation