The influence of wellbore inflow on electromagnetic borehole flowmeter measurements
Ground Water
By: T. Clemo, W. Barrash, E.C. Reboulet, T.C. Johnson, and C. Leven
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Abstract
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. ?? 2009 National Ground Water Association.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The influence of wellbore inflow on electromagnetic borehole flowmeter measurements |
| Series title | Ground Water |
| DOI | 10.1111/j.1745-6584.2008.00559.x |
| Volume | 47 |
| Issue | 4 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Ground Water |
| First page | 515 |
| Last page | 525 |
| Google Analytic Metrics | Metrics page |