Gas Source Diagnostic Tool
Determining the source of methane leakage can be complex, expensive and unsuccessful. Controlled casing expansion can be used as a gas source diagnostic tool by incorporating surface gas-flow monitoring.
Elastic casing expansions are placed above the suspected gas source while gas flow is monitored at surface. When the flow is reduce or stopped completely, the source of the gas is identified as below the depth of expansion. This results in more efficient of remedial procedures.