Introduction to Borehole Flowlogging (#855)
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.
University of Arkansas