Eliminate Sustained Casing Pressure in DUC Wells

Oil and gas wells that have been drilled but have not yet undergone various completion activities are often compromised by annular leaks. Pressure from these leaks continues to build over time, with the risk of a blowout unless vented or flared. BioSqueeze® can help operators avoid band-aid solutions, eliminating sustained casing pressure in very few attempts, foregoing the need for maintenance down the road. Since BioSqueeze® seals leakage pathways themselves and leaves nothing in the wellbore, no-drill out is needed after the job is done, saving operators time and money.

BioSqueeze® can eliminate sustained casing pressure in DUC wells using a Bottom Annular Gas Squeeze, shown below.

Bottom Annular Gas Squeeze

Operator Preparation

Step 1:
Identify problem annulus through bond logging.

Step 2:
Place bridge plug and perforate or notch casing to target leakage pathways.

Step 3:
Set packer and run tubing to bottom perf/notch to squeeze into the annulus.

BioSqueeze® Execution

Step 4:
The first day, connect equipment and pump low-viscosity, environmentally friendly biomineralization solution in position downhole using tubing.

Step 5:
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.

Step 6:
Seal the well in overnight at pressure to continue to form the barrier.

Step 7:
The following day, return to continue pumping fluids, ensuring that all problem annuli are fully sealed.