4:29 The challenge
- →A new access well had to enter a salt-dome storage cavern at the top, not the side.
- →It was spudded just ~132 ft from the original well at surface.
- →Tight tolerance: stay within ~8 ft of the original well down to the cavern roof at ~1,820 ft.
Our solution
Passive magnetic ranging on a coiled-tubing-drilling BHA used magnetic surveys taken while drilling each cased section to resolve the new well's position relative to the original well's casing. Gunnar steered it toward the target's 7" casing shoe (~1,750 ft TVD), then guided it straight down to land on the cavern roof at the top.
Cavern roof entered at the top, a first coiled-tubing-drilling collaboration
The result
~1,820 ft
cavern roof, landed on the cavern top, ~8 ft off the original well
- ·Ranged to the original well from a ~132 ft surface offset
- ·Tracked the target down to its 7" casing shoe (~1,750 ft TVD)
- ·Kept within ~8 ft to ensure top (not side) entry into the storage cavern
- ·Guided the final ~100–200 ft straight down to the cavern roof
Ranging
PMR
Deployment
Coiled tubing While Drilling
Re-entry
No
Location
Texas, USA
Year
2020
Watch, related footage
Full video library → 4:29 
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