CASE STUDY:
Renegade Renedies Surface Gas Flow for P&A with 7-Inch Channel Fill
When annular gas migration blocked a Marcellus well from advancing to plug and abandonment, Renegade deployed the Punch and Inject Tool to remedy the problem within two days using a crane-only operation.
CONDITION:
While preparing for a plug and abandonment completion of a Marcellus well, pressure testing revealed gas migration at the surface, delaying the operation. Regulations mandate all annuli be static at the surface before proceeding with plug and abandonment.
» The pre injection CBL performed by Renegade services (left). The post injection CBL (right) from Renegade Services Bond log progression shows resin advancing upward through the treated interval across four targeted injections. Final evaluation confirmed the resin top, indicating the channel was filled and zonal isolation was achieved.
PROBLEM IDENTIFICATION:
Gas was migrating between the production string and intermediate casing at depths between 2,500 and 2,700 ft. Bond log evaluation confirmed the location and extent of the channel.
The tight annular environment and shallow depth prevented the conventional course of remediation using a squeeze tool. Rig-based alternatives would have required extended delays and cost.
SOLUTION & RESULTS:
Renegade was able to mitigate the issue within two days on location using 10 punches and four precise resin injections to close the channel and stop the migration. The tool was deployed using crane-assisted e-line without a rig, explosives or a cement truck.
Injections were delivered at depths between 2,500 and 2,700 ft. Bond log runs between injections showed the rising top of the resin, confirming upward fill through the interval. Final CBL evaluations confirmed resin topping out at 2,454 ft, achieving full zonal isolation across the treated zone.
After the required cure-time, the well was reopened and confirmed, no gas or flow present at the surface. The remediation was successful, allowing for plug and abandonment work to continue.