At the Core – October 2021 Keep up to date on what is going on at Utah FORGE. Read about it in the...
Two-Phase Flow
A condition that is attained in production wells associated with high temperature (>200°C) geothermal reservoirs, wherein the flowing fluid comprises a mixture of steam and water. As the two-phase fluid depressurizes in the well, it expands causing it to accelerate upwards, negating the need for a pump to produce fluid.
Geothermal Glossary
Word of the Week – Piezometric Surface
Piezometric Surface The imaginary surface to which groundwater rises under hydrostatic pressure in wells or springs.
Word of the Week – Proppant
Proppant Sand-sized solid grains that are injected in a fluid suspension and used to hold open stimulated fractures in a geothermal reservoir.
Word of the Week – Propylitic Alteration
Propylitic Alteration A term borrowed from studies of hydrothermal ore deposits that refers to an assemblage of secondary hydrothermal minerals which forms in igneous rocks. This assemblage is made up of chlorite, illite, feldspar (both Na and K-rich varieties),...