Wairakite A zeolite mineral of hydrothermal origin that was first identified in the Wairakei geothermal field in New Zealand by Alfred Steiner. It forms clear to white prismatic crystals,...

Well Casing Large diameter pipe that is assembled and inserted into newly drilled intervals of a well. The upper portions of a cased well are commonly cemented in place to provide a smooth...

Wellhead Surface equipment at the top of a well (oil, gas, geothermal) that provides a structural and pressure-containing interface for drilling and production equipment. It is used to...

Well Logging Methods used to survey and characterize the physical and geological characteristics along and near the wall of a well, including the temperature, pressure, fracture density,...

Zonal Isolation The process of operationally isolating specific intervals or zones along a wellbore to perform well intervention activities, such as stimulation.

Zircon Zirconium silicate (ZrSiO4) is a minor or accessory mineral in igneous and metamorphic rocks. It contains measurable albeit minor amounts of uranium and lead, which make it amenable...