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.
Identify potential hydrocarbon gas seeps from plugged and abandoned wells and determine associated sustained headspace pressure. Wells were located at two disparate sites, with a total of 23 wells requiring assessment within a constrained time frame, necessitating concurrent monitoring of multiple wells.
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.
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