Water Wells - Diagrams
Water wells can be drilled in two types of rock formations,
consolidated and unconsolidated formations.
Consolidated Formations
In these types of wells water comes from fractures
in the rock. The larger and more numerous the fractures, the
larger the volume of water. These wells are generally drilled
with compressed air due to the stability of rock to stay open
on its own during the drilling process. In these wells water
quantity estimates can be made before setting casing.
Unconsolidated Formations
In these types of wells, water comes from a sand
and/or gravel layer. These types of wells generally need to
be fluid (mud) drilled due to the nature of the sand and gravel
not staying open during the drilling process. These wells
need to be cased to determine water quantity.
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