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  • Case Study

Monitoring Gas Migration from Plugged and Abandoned Wells

+ about the project

Our client needed to determine whether gas migration is occurring through cement plugs, assess whether it is continuous or intermittent, and evaluate the influence of ambient conditions. Precisely quantify gas migration rates, monitor headspace shut-in pressure, and capture fugitive emissions for compositional analysis.

+ summary facts
Location
Australia
Application
Plug and Abandonment Monitoring Methane
+ results
  • Efficient Deployment: Qteq successfully prepared and tested all 23 wells autonomously using patented Ventbuster® flow channel technology.
  • Real-Time Data Collection: Ventbuster® measured and computed data was logged on-site and transmitted to a cloud-based IoT platform for remote client access.
  • Comprehensive Emissions Analysis: Emission rates were processed by hydrocarbon and non-hydrocarbon gas types, with detailed compositional analysis upon completion.
  • Actionable Intelligence: The system generated high-quality, unambiguous data to support decision-making.

Ventbuster® technology confirmed that intermittent bubbling observed at several well sites was attributable to fluctuating atmospheric conditions rather than gas migration. Based on these findings, the client was able to ‘cut and cap’ the wells, avoiding unnecessary re-monitoring or re-entry costs. Additionally, Qteq allocated extra Ventbuster® units to conduct further monitoring beyond the initial scope, without extending the project timeline.

Related Case Studies

Monitoring Gas Migration from Plugged and Abandoned Wells

Monitoring Gas Migration from Plugged and Abandoned Wells
Identifying False Positive SCVF in Onshore CSG Wells

Identifying False Positive SCVF in Onshore CSG Wells

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