1214WAB® providing a SCP barrier and foundation for P&A cement plugs
WCS products1214WAB, 812WAB & 6WAB
V0 1214WAB whitin 13 3/8” casingEnabled client to verify B annulus barrier
Rapid set V0 WAB LH'S added valueVia no requirement for set down weight to seal
Extensive wab portfolio enabledExtended reservoir contact via 6WAB range
Capex effective p&aUsing V0 1214WAB as base for reduced risk P&A
Challenging cement operations in the 12 ¼” hole due to potential weak formations and high ECD based the rational for the placement of the 1214WAB within the 13 3/8". Once set, the 1214WAB was then tested via applying pressure to the B annulus to FIT + 70 bar confirm Welltec Annular Barrier (WAB) sealing and providing barrier verification.
The WAB was positioned close to the 13 3/8” shoe, to form part of the barrier envelope.
Exposed formations below the 13 3/8” csg shoe increased the risk of gas migrating and resulting in a gas below well head causes problems during PP&A. IS0 14310 V0 leak rate qualification of the WAB permitted installation without dispensation from the authorities. Next step was to drill out across the reservoir section to 8 1/2" open hole.
Primary & contingency liner
All pressure was then bleed off the pressure and verification that the WAB LH is set via pull/slacking off weight on the liner top. The remainder of the reservoir section was then drilled out to 6" and a 6WAB LH was deployed with a 4 1/2" cement-less liner, as above.
Plug & abandonment
1. Ensuring no SCP within the B annulus and as a base
2. As a future base for cement during well abandonment
After a successful well test, a bridge plug was installed inside the 9 5/8” casing just below the WAB depth.
The 9 5/8” casing was then cut and the bridge plug and WAB were tested to 70 bar above 13 3/8” LOT.
Cement was pumped to provide the necessary seal integrity to met the regulatory requirements for well abandonment.
CAPEX effective, reduced risk P&A operations.
Enhanced well integrity and extended reservoir contact via IS0 14310 V0 rated WAB portfolio.
Our WAB for Well Abandonment range, when incorporated within a cased or open hole across the cap rock will provide significant future value as the foundation for critical placement of P&A cement plug.