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Scale
Refers to deposition of minerals (e.g., calcite, silica, anhydrite, clays) in the well and reservoir that reduce permeability and block fluid channels.
Geothermal Glossary
Word of the Week – Geyser
Geyser A rare type of hot spring that periodically discharges a fountain of hot water and steam (or sometimes just gas).
Word of the Week – Gneiss
Gneiss Metamorphic rock that forms under intense pressure and high temperature and that is made of quartz, feldspar, amphibole and mica. Gneiss represents the highest grade of metamorphic rock, which is characterized by alternating bands of dark and light-colored...
Word of the Week – Granite
Granite Light colored, coarse grained, intrusive rock with a felsic (silica-rich) composition that is mostly made of quartz, sodium and potassium-bearing feldspar, and plagioclase. Minor amounts of other minerals can include mica (muscovite, biotite), hornblende,...