Description
Gain an understanding of the causes and the approaches used to prevent or correct poor well performance.This presentation will cover the fundamentals related to siting wells, well designs, and the design aspects of constructing wells, including materials and parameters related to the casingscreen string, gravel packing, grouting, well development, and testing. The testing discussion will include the multiple functions of testing, including designing the pump installation, establishing the initial efficiency of the well, and the use of ongoing testing data to assess the operation and maintenance of wells over time. Rehabilitation methods for wells will also be discussed. This presentation is designed for anyone interested in the entire process related to well drilling, from siting the well to the design, installation, and operation of existing wells.
Date: 2022-02-18 Start Time: End Time:
Learning Objectives
Hydrologic Cycle
Hydrogeologic and Well Concepts
• Types of Groundwater Systems
• Aquifer and Well Characteristics
Geologic Terranes
• Alluvial/Colluvial/Eolian
• Sedimentary Bedrock
• Karst
• Volcanics
• Precambrian
Drilling Methods/Fluids
• Auger
• Percussion
• Rotary
• Sonic
Types of Well Design
• Open Hole
• Cased
• Infiltration Gallery
• Radial Collector
Considerations in Well Design
• Drilling Method
• Type of Completion
• Uses
Well Construction
• Drilling Fluids
• Casing/Screen Considerations
• Gravel Pack
• Grouting
Well Development
• Natural
• Development Methods
• Bailing, Surging, Jetting, Rawhiding, Chemicals
Aquifer Testing
• Step Test
• Constant-Rate Test
• Video Survey
• Falling Head/Constant Head Test
• Water Quality
Performance Monitoring With Time
• Well-To-Well Interference
• Comparative Testing to Baseline (Loss of Specific Capacity)
• Energy Cost Changes With Time
• Water Quality Testing
Periodic Well Maintenance
• Based on Ongoing Performance Monitoring
• Loss of Specific Capacity
• Water Quality Issues
• Increased Energy Costs
• Well Rehabilitation
• Mechanical Surging
• Jetting w/Chemicals
• Acidizing
• Sonic
Case Studies
Bruce A. Lytle, P.E.-Lytle Water Solutions, LLC
