Understanding Casing Corrosion

about the project

In 2022 GEO PSI became aware that current Casing inspection technologies were unable to reliably identify the corrosion on the exterior of the casing in some Coal Seam Gas wells.

GEO PSI subsequently went on a global search for any company that had the technology to address this problem. As a result, GEO PSI identified Dexon, a pipeline inspection company that had high resolution tools that could identify corrosion in pipelines and worked with them to develop a wireline tool that could be deployed on Coal Seam Gas wells.

The challenge was to be able to successfully and reliable identify and measure both exterior and interior casing corrosion with a resolution of 4mm in both horizontal and vertical dimenions.

GEO PSI assisted in the development of the Q-Rode tool that could be deployed on wireline that had fast onsite evaluation capabilities.

Summary facts
Location
Queensland, Australia
Application
Well Remediation
Solutions
Challenges
  •  Identify interior and especially exterior corrosion to a resolution of 4mm and 1mm residual thickness
  •  Service to be able to be deployed on wireline at a minimum logging speed of 10mm/min
  • Ability to evaluate the data within 1 hr of the tool reaching surface.
  • Advise the client if the minimum casing corrosion thresholds had been met
Objectives
  •  To be able determine if the casing was still presenting an effective barrier.
  •  That any casing corrosion was understood and within acceptable criteria
  • The ability to monitor casing corrosion over a period of time and if present. predict the rate of casing corrosion.
  • The ability to provide the Q-Rode service on GEO PSI own wireline logging units thereby providing a single point of contact and seamless operations for the customer.
results
  • GEO PSI Q-Rode tools have demonstrated that they can effectively and reliable identify casing carrion to the necessary integrated minimum criteria.
  •  Data from the Q-Rode tool can be effectively evaluated with 2 hrs after the completion of the logging run to enable the customer to make cost effective and timely decisions.
  • GEO PSI can offer a complete, seamless and cost effective Casing Evaluation service which minimises costs and simplifies operations.

Our customers have realised their bigger picture, how can we help you Picture Bigger?

Get in touch to discover how our GEO PSI’s tailored solutions can help you protect the environment, safeguard assets, achieve operational excellence.

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