Problem Statement
- The producing well was shut in due to multiple issues, including:
- Wire fish stuck in the wellbore.
- Damage to the DHSV seal bore.
- High SCP observed at the surface casing.
- A plan was proposed to reactivate the well, which has a high production potential.
- Independent charging of 1000 psi SCP was suspected to originate from a washed-out casing shoe at the B-section and micro-annulus channelling to the surface.
Challenges
- Small-footprint, fit-for-purpose equipment required.
- Single injection/return point for sealant deployment.
- Low MAWOP restricting the application of higher sealant squeeze pressures.
Objective
- To seal the micro-annulus leak by placing an adequate length of resin plug onto the TOC and squeezing resin at high pressure.
- Employ an effective sealant placement method using high-density slurry and a novel feed-through intervention hose to ensure uncontaminated resin placement.
Solutions
- Conducted well Leak diagnostics which includes:
- Fluid level checks.
- PBU rate analysis.
- Surface integrity pressure tests.
- Sealant placement utilizing heavy-density slurry through the circulation method.
- Squeezed and positioned the resin plug over the cement leak area (within MASP).
- Rectification Acceptance Criteria:
- Perform post-treatment integrity testing.
- Compare PBU rates before and after sealant placement.
Results
- Successfully injected sufficient amount of resin, equivalent to 12 meters of plug length.
- Resin cured under surface pressure within 24 hours.
- Manageable PBU recorded post-sealant treatment.
- Fit-for-purpose equipment performed as intended.
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