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

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Detection of CrossflowProblem orInformation NeededRec. Logging ToolsProcedure/Level of DetailDetection ofCrossflow orUndergroundBlow outTemperatureSurveyNoise LogOxygenActivation SurveyDifference in slope of temperature gradient – willdetect flow rates down to 25 BPD if liquid andtemperatures of fluids are different. Figures ontemperature vs. flow distance help estimate waterflow in the annulus.Best performance of noise logs is with gas flow.Gas flow to about 10 actual ft 3 /D (Note – notstandard ft 3 /day). At very low gas flow rates(q
Location of Cement TopProblem orInformation NeededRec. Logging ToolsProcedure / Level of DetailLocation of CementTopTemperatureSurveyOK if run within 12 to 24 hrs of cement job. Littletemperature variation with the formation maymake cement top difficult to see.CBL (cementbond log)Best results after 3 days or when cement hasdeveloped 70%+ of the compressive strength.These tools may be too large for slim hole wells.Gravel-packlogging (GR)Tool response depends on density differencebetween cement and annular fluid.3/14/2009 3George E. King EngineeringGEKEngineering.com
Page 1: Locating a Tubing Leak• High reso
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Page 10 and 11: Problem orInformationNeededLocation
Page 12: Comparison of a memory CNL and PNL

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