Cement Bond Log A geophysical well log that is obtained using a sonic-type tool on a wireline. The result helps to...

Chemical Geothermometer A temperature that is calculated based on the chemical composition of a hydrothermal fluid and...

Chlorite A micaceous mineral that is commonly green-colored, composed of iron and/or magnesium, and forms due to...

Conduction For geothermal applications, this refers to heat transfer in solids where thermal energy flows via...

Convection Refers to heat transfer by fluid circulation in permeable rocks where thermal energy is transported with...

Cooling Tower Plant equipment that is used to dissipate heat into air rather than into a river. Cooling is induced in...

Cyclone Separator A large cylindrical vessel attached to two-phase production pipelines in geothermal fields that is...

DAS Distributed Acoustic Sensor. Involves the deployment of fiber optic cable on the surface or in a well, and the...

DFIT Diagnostic Fracture Injection Test. A subsurface well test in which pressure is monitored as a small volume of...

Diorite Dark colored, coarse grained, intrusive rock that contains less silica than granite and that is mostly made of...

Directional Drilling The practice of steering the trajectory of a well during drilling from vertical to a deviated...