Wells that currently produce oil and gas can create unwanted bradenhead pressure (sustained casing pressure), resulting in methane emissions. BioSqueeze® can seal leakage pathways so that the well can keep producing at a high rate, without unnecessary emissions escaping in the process. 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 bradenhead pressure in producing wells using a Bottom Annular Gas Squeeze, 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.
BSI was contracted to assist with gas migration on a re-entry in Wyoming. Existing cement plugs prevented access for a perf and squeeze without drillout, prompting the operator to explore alternative remediation techniques. BSI utilized surface injection to push fluids directly into leakage pathways in the annulus.
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