Introduction to Borehole Flowlogging (#855)

Presented on Thursday, February 19, 2015

Learn how to obtain the most effective results from the application of the latest high-resolution borehole flowlogging techniques — including heat-pulse and electromagnetic flowmeters, dilution methods, and downhole dye tracing — during this online offering.

Borehole flowmeters provide direct measurement of the hydraulic properties of aquifers whereas other logging techniques require additional interpretation of such measurements as electrical resistivity or gamma activity.

Recently developed flow profiling equipment allows precise identification of inflow and outflow zones with minimal pumping rates so that drawdown quickly stabilizes and a minimal amount of contaminated water is produced for disposal. Cross-borehole methods can provide efficient identification of flowpaths in complex fractured-rock aquifers. Readily available numerical codes can be used to estimate the transmissivity, storage coefficient, and hydraulic head of flow zones in boreholes penetrating multiple aquifers. The “virtual straddle packer” method is used to convert flowlog data to the set of measurements typically made with much more cumbersome straddle-packer equipment.

This webinar covers:

• Overview of flowlogging equipment and methods
• Flowlogging logistics and procedures
• Integrating flow profiles and other log data
• Flowlog calibration and field corrections to data
• Inverting flowlog data for transmissivity and hydraulic head
• Cross-borehole experimental setup
• Available numerical codes for flowlog interpretation
• Flowlogging vs. straddle-packer hydraulic tests
• Practical field examples.

In addition, you will receive free log analysis software.

Fred Paillet, Ph.D.
University of Arkansas
Fred Paillet, Ph.D., is adjunct professor of geosciences at the University of Arkansas and emeritus research scientist with the U.S. Geological Survey. He was project chief conducting research in borehole geophysics with the USGS for more than 20 years and has continued research with academic appointments at the University of Maine, University of Rennes, and the University of Queensland since that time. Paillet was one of the principle investigators on the long-term USGS fractured rock aquifer study at Mirror Lake, New Hampshire. He has also worked extensively with the U.S. Environmental Protection Agency at various Superfund sites, and with environmental agencies in the states of New York, Massachusetts, North Carolina, Connecticut, Wisconsin, and Minnesota. Paillet has also served as an instructor for numerous short courses on the application of borehole geophysics in hydrogeology conducted by NGWA, U.S. EPA, USGS, and U.S. Army Corps of Engineers.
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