Problem and Challenges
The well, equipped with an Insert Valve (IV), experienced a two-way communication leak in the control line (CL).
- The CL was unable to hold pressure, leading to gas ingress causing pressure buildup (PBU).
- The IV sealing element consisting of swellable O-ring packing system.
Solution
- Conducted diagnostic tests, revealing a severe injectivity leak rate of 616 ml/min at 3500 psi and a PBU rate of 305 psi over 30 minutes.
- Optimized the volumetric deployment of a proprietary Pressure Activated Sealant (PAS) to seal the leak in situ based on the severity of the issue.
- Performed continuous sealing performance evaluations throughout the rectification process.
- Installed an on-site Back Pressure Manifold (BPM) to address gas ingress issues.
Results
- The severe leak in the control line (Insert Valve) was successfully sealed after several positive and negative pressure tests.
- No further gas blowing was observed during CL bleed-off.
- A good indication of flow tube movement and a successful tubing inflow test confirmed the reinstatement of functionality for both the control line and the Tubing-Retrievable Safety Valve (TRSV).
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