Casing Evaluation of 110 Producing Methane Wells in Australia
High-resolution ultrasonic casing evaluation across 110 methane wells in Australia, completed during scheduled workovers with zero NPT and 100% data delivery. Integrated with CBL and GR operations, delivering preliminary results in 2 hours and final reports in 72 hours. Enhanced well integrity benchmarking, lifecycle planning, and regulatory compliance without extending downtime.
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Overview
Challenge:
Capture baseline casing integrity data across 110 producing wells during scheduled remedial operations—while achieving zero non-productive time (NPT) and 100% data delivery.
Project Details:
Length: Depths inspected above key formations
Deployment: Electric line
Run Speed: 20 m/min
Temperature Range: 20-60C
Pressure: 1,078 psi (hydrostatic)
Type: Producing methane wells
Inspection Medium: Water
Product: Methane
Continent: Australia
Tool: UT-WC Viper (high-resolution well casing inspection tool)
Challenges & Solutions
Challenges:
Capture well integrity data without extending downtime over a 9-month period
Solutions:
Deployed Dexon’s high-resolution ultrasonic tool alongside cement bond log (CBL) and gammay ray (GR) operations during existing workovers; completed inspections opportunistically while wells were already offline
Achieved 100% data delivery with zero non-productive time (NPT); delivered preliminary results within 2 hours, final reports within 72 hours
Maintained 24-hour on-call readiness, allowing Dexon to rapidly adapt to operator’s workover schedule
Rotated engineers from Dexon HQ to maintain readiness & manage fatigue
Conclusion:
Dexon’s ultrasonic casing evaluation campaign in the Surat Basin delivered critical insight into casing condition across 110 producing wells—without extending downtime or delaying remedial operations.
By integrating with wireline CBL and GR activities, Dexon enabled the operator to benchmark casing integrity, strengthen well lifecycle planning, and enhance regulatory compliance.
With zero incidents, zero NPT, and 100% data delivery, this project demonstrated the value of efficient, high-impact evaluations during planned well maintenance.