Locating a Tubing Leak - George E King Petroleum Engineering Oil ...

Flow Behind PipeProblem orInformationNeededAnnular FlowRec. Logging ToolsTemperatureSurveyOA - oxygenactivationNoise loggingProcedure / Level of DetailUseful where the well has active annular flow.Can spot flows on the order of 1 bpd (after 24 hrs)if temperature of formation at measurement andsource of water is sufficiently different. Twosurveys, 12 hrs apart is usually adequate to spotpresence of a channel.Accurate, but don’t swap out muds. Migration offluids in pipe may be seen as “channel”.Accuracy depends on channel variations toaccelerate flow and change sound.3/14/2009 7George E. King EngineeringGEKEngineering.com