The filterPackType in WellConstruction describes the gravel or sand used to surround the well screen and promote groundwater inflow. Common types include "20/40 silica sand" or "natural gravel pack." An appropriately sized filterPackType prevents fine formation particles from entering the well and clogging the screen, which would reduce yield and bias analytical results. This field appears in well completion reports and is referenced when evaluating long-term well performance or planning redevelopment.
Technical section
Data model, API, and internals — visible to developers.