5:12 The challenge
- →Two old exploration wells (drilled 1965 and 1987) sit over a sandstone CCS target.
- →Legacy P&A plugs are too shallow for long-term CO₂ containment.
- →Inclination-only / uncertain legacy surveys leave the target position uncertain.
- →A deeper, CO₂-resistant abandonment barrier is required to qualify the CO₂ store.
Our solution
Designed intercept wells to re-enter each target: AMR/PMR ranging with Gyro-While-Drilling, a map-and-sidetrack contingency for legacy survey uncertainty, a ~2° incidence intercept, milling into the 9⅝" (and 13⅜") casing, then a ≥60 m CO₂-resistant cement plug.
Re-abandonment of both wells assessed technically feasible
The result
Feasible
2 wells, CCS re-abandonment
- ·Confirmed re-abandonment of both wells is technically feasible
- ·Intercept at ~2° incidence; mill into 9⅝" (one well also 13⅜") casing
- ·Map-well sidetrack contingency to resolve legacy survey azimuth uncertainty
- ·≥60 m CO₂-resistant cement plug for long-term reservoir isolation
Ranging
AMR + PMR
Deployment
BHA While Drilling + Wireline
Re-entry
Yes
Location
North Sea, UK
Year
2025
Watch, related footage
Full video library → 5:12 
4:14 Intersecting Two Abandoned Wells Under Los Angeles (Part 2) | P&A Case Study
7:02