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.
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.
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.
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.
Tags: P&A
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BSI eliminated gas flow on the production and intermediate annuli with the help of acoustic diagnostics.
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BSI sealed leaks in a cemented annulus, eliminating gas flow, and allowing abandonment operations to proceed as planned.
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BSI sealed micro annuli casing expansion and micro-fine cement were unable to remediate.
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BSI assisted with abandonment of a well, sealing a leaking annulus other technologies repeatedly failed to remediate.
Tags: P&A
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