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The Influence of Wellbore Inflow on Electromagnetic Borehole Flowmeter Measurements
Ground Water
  • Tom Clemo, Boise State University
  • Warren Barrash, Boise State University
  • Edward C. Reboulet, Kansas Geological Survey
  • Timothy C. Johnson, Idaho National Laboratory
  • Carsten Leven, The Helmholtz Centre for Environmental Research
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This paper describes a combined field, laboratory, and numerical study of electromagnetic borehole flowmeter measurements acquired without the use of a packer or skirt to block bypass flow around the flowmeter. The most significant finding is that inflow through the wellbore screen changes the ratio of flow through the flowmeter to wellbore flow. Experiments reveal up to a factor of two differences in this ratio for conditions with and without inflow through the wellbore screen. Standard practice is to assume the ratio is constant. A numerical model has been developed to simulate the effect of inflow on the flowmeter. The model is formulated using momentum conservation within the borehole and around the flowmeter. The model is embedded in the MODFLOW-2000 ground water flow code.
Citation Information
Tom Clemo, Warren Barrash, Edward C. Reboulet, Timothy C. Johnson, et al.. "The Influence of Wellbore Inflow on Electromagnetic Borehole Flowmeter Measurements" Ground Water (2009)
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