Comparison of velocity-log data collected using impeller and electromagnetic flowmeters
Ground Water
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Abstract
Previous studies have used flowmeters in environments that are within the expectations of their published ranges. Electromagnetic flowmeters have a published range from 0.1 to 79.0 m/min, and impeller flowmeters have a published range from 1.2 to 61.0 m/min. Velocity-log data collected in five long-screened production wells in the Pleasant Valley area of southern California showed that (1) electromagnetic flowmeter results were comparable within ??2% to results obtained using an impeller flowmeter for comparable depths; (2) the measured velocities from the electromagnetic flowmeter were up to 36% greater than the published maximum range; and (3) both data sets, collected without the use of centralizers or flow diverters, produced comparable and interpretable results. Although either method is acceptable for measuring wellbore velocities and the distribution of flow, the electromagnetic flowmeter enables collection of data over a now greater range of flows. In addition, changes in fluid temperature and fluid resistivity, collected as part of the electromagnetic flowmeter log, are useful in the identification of flow and hydrogeologic interpretation.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Comparison of velocity-log data collected using impeller and electromagnetic flowmeters |
| Series title | Ground Water |
| DOI | 10.1111/j.1745-6584.2005.0030.x |
| Volume | 43 |
| Issue | 3 |
| Year Published | 2005 |
| Language | English |
| Contributing office(s) | California Water Science Center |
| Description | 5 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Ground Water |
| First page | 434 |
| Last page | 438 |
| Google Analytic Metrics | Metrics page |