When it’s time to retire an oil and gas well for good, BioSqueeze® permanently eliminates methane leakage and sustained annular pressure in the well without having to return several times to meet regulations. For P&A jobs where a cement plug in the wellbore has already failed, BioSqueeze® can seal cracks in the cement plug to eliminate leaks without the need for any drill out.
BioSqueeze® can eliminate sustained annular pressure in plug and abandon wells using three different techniques, 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.
Step 1:
Identify problem annuli and ensure cement is to surface.
Step 2:
The first day, connect equipment and pump low-viscosity, environmentally friendly biomineralization solution into the cement at the top of the problem annulus.
Step 3:
Pump fluids into the annulus for about 6 hours, applying pressure to squeeze fluids deep into leakage pathways. Monitor injection rate and pressure until gas migration is eliminated.
Step 4:
Seal the well in overnight at pressure to continue to form the barrier.
Step 5:
The following day, return to continue pumping fluids, ensuring that micro annuli are fully sealed.
Step 1:
Set packer and run tubing to just above existing cement plug.
Step 2:
The first day, connect equipment and pump low-viscosity, environmentally friendly biomineralization solution into the leaking cement plug.
Step 3:
Pump fluids into the wellbore for about 6 hours, applying pressure to squeeze fluids deep into leakage pathways. Monitor injection rate and pressure until gas migration is eliminated.
Step 4:
Seal the well in overnight at pressure to continue to form the barrier.
Step 5:
The following day, return to continue pumping fluids, ensuring that all micro 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.
Tags: P&A
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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.
Tags: P&A
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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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