Carbon capture, utilization and sequestration (CCUS) is becoming an important solution for reducing the impact of the oil and gas industry on the planet. BioSqueeze® can make Class VI injection wells more efficient at storing carbon dioxide by eliminating sustained casing pressure and sealing leakage pathways at their source. 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® uses its Bottom Annular Gas Squeeze to seal leaks in carbon sequestration wells, shown below.
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.