Bottom Annular Gas Squeeze
Identify problem annulus through bond logging.
Place bridge plug and perforate or notch casing to target leakage pathways.
Set packer and run tubing to bottom perf/notch to squeeze into the annulus.
The first day, connect equipment and pump low-viscosity, environmentally friendly biomineralization solution in position downhole using tubing.
Pump fluids into problem annuli for about 6 hours, applying pressure to squeeze fluids deep into leakage pathways. Monitor injection rate and pressure until gas migration is eliminated.
Seal the well in overnight at pressure to continue to form the barrier.
The following day, return to continue pumping fluids, ensuring that all problem annuli are fully sealed.