High-Angle Intercept, Mill & Re-Enter for P&A

Western Australia · 2025

Intercept, mill and re-enter to permanently abandon a legacy well where concentric P&A failed

The challenge

→Through-tubing (concentric) P&A could not set a reliable barrier.
→A permanent barrier was required below the production packer, deep in the reservoir.
→Drill an intercept well, locate the target, mill a window and re-enter at high angle.

Our solution

Designed and drilled the intercept well: GWD with passive magnetic ranging while drilling, then active wireline AMR (with AMR-while-drilling) to home in. Located the target, drilled down 30+ m of the target casing, milled a window and re-entered to set a permanent barrier, delivered via Gunnar's Australian entity.

Completed in ~half the forecast time, single intercept above the packer

The result

~50%

time saved vs. forecast

·Single intercept above the packer; 30+ m of casing milled and perforated
·Gen-2 tools + GWD withstood drilling down casing, no failures reported
·Passive-while-drilling + wireline AMR + AMR-while-drilling reduced trips and HSE risk
·Overcame the barrier limitation of the earlier concentric P&A attempt

Ranging

AMR + PMR

Deployment

BHA While Drilling

Re-entry

Yes

Location

Western Australia

Year

2025

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