Isolate
The existing bridge plug and cement were used to isolate the target below the leaking interval.
Case study 058 · La Plata County, Colorado
San Juan disposal
well remediation.
A rigless BioSqueeze treatment sealed casing leakage at approximately 7,800 feet, preserved internal diameter and restored mechanical integrity.
ChallengeCasing leak
Depth~7,800 ft
DeploymentRigless downhole
OutcomeSuccessful H-5 MIT
The challenge
Two cement squeezes had not restored integrity.
An operator contracted BioSqueeze to restore mechanical integrity on a disposal well in the San Juan Basin. Diagnostics isolated leakage to a 32-foot interval on the 4½-inch production casing at approximately 7,800 feet.
Two conventional cement squeezes had been attempted with low confidence in placement and no meaningful improvement in pressure-falloff performance.
The treatment
Rig-assisted preparation. Rigless remediation.
Position
A packer was set at 7,774 feet and a capillary string placed through it to 7,825 feet.
Release the rig
The workover unit moved to another well before BioSqueeze began the treatment.
Seal progressively
Injection pressure was raised in steps, sealing accessible pathways at each pressure level before moving higher.
The result
Mechanical integrity restored.
Leaks sealed. Internal diameter preserved. Injection resumed.
98.8%reduction in injection rate: 0.668 to 0.008 gpm
97.8%reduction in pressure falloff: 18.4 to 0.4 psi/min
112 galtotal biomineralization fluid injected
1,200 psiheld for 30 minutes during successful H-5 MIT
The methodical pressure-stepping strategy allowed mineral formation across accessible defects ranging from sub-micron gaps to larger connected channels.
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