Audio logs are used to “listen for” and record fluid movement immediately surrounding the downhole tool and behind the pipe.

During the operation, station stops are made near areas of suspected flow that have first been identified with a temperature log during the initial descent into the well. The downhole microphone responds to fluid flow and pressure drops located near the tool and records these noise events for future analysis.

The audio log is run to confirm the location of fluid moving through channels behind the pipe and the location of any lost circulation zones. Fluid flow phase and sand production can also be identified by analyzing the frequency and amplitude of the recorded noise events.

• Locating liquid or gas entry points
• Detecting leaks
• Detecting channels
• Locating lost circulation zones/underground blowouts
• Identifying sand production

• Casing Collar Locator (CCL) Tool
• Continuous Temperature Tool