What information should you have available when determining well screen design?

• A. Formation particle size, water flow rate, well depth, and aquifer characteristics.
• B. Hydraulic conductivity only
• C. Temperature and humidity
• D. Soil color and odor

Answer: (C)

Designing a well screen centers on matching the screen to the formation and the intended yield, so you need data that describe the formation and the pumping requirements. The formation’s particle size distribution tells you what slot size will keep sand out without overly restricting water flow. The water flow rate or desired production rate indicates how much area of screen and how large the slots can be before head loss or clogging becomes a problem. The depth of the well helps determine how much of the screen should be placed in the productive zone and how long the screen interval should be to maximize yield and minimize sand production. Aquifer characteristics, such as hydraulic conductivity and overall permeability, provide context for expected drawdown, filtrations, and stability of the screen design across different lithologies and depths.

Temperature and humidity, or soil color and odor, don’t influence screen design decisions, so they aren’t part of the necessary information.