Aquifer porous and permeable rock unit

Aquifer

Porous and permeable rock unit or unconsolidated layer in the subsurface in which all the pores and voids are filled with water. Water supply for wells comes from aquifers.

Geothermal Glossary

Word of the Week – Drill Cuttings

Word of the Week – Drill Cuttings

Drill Cuttings Small chips of rocks (e.g., <1/8 inch or <3 mm) obtained during drilling with a rotary bit that are continuously returned to the surface by the circulation of mud. Drill cuttings are the main source of geological and stratigraphic interpretation...

Word of the Week – Enhanced Geothermal System

Word of the Week – Enhanced Geothermal System

Enhanced Geothermal System Unconventional geothermal resources that contain heat similar to conventional hydrothermal resources but lack the necessary groundwater and/or rock characteristics (e.g., permeability) to enable energy extraction without stimulation.

Word of the Week – Epidote

Word of the Week – Epidote

Epidote Alumino-silicate hydrothermal mineral having a distinctive yellow-green color that is used a mineral geothermometer, forming at temperatures above ~230°C. The first down hole occurrence of epidote commonly coincides with the top of a high-temperature...

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