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Normal Fault
High angle fault that results from extensional stress and forms a steeply dipping planar structure. Slip movement during an earthquake is vertical and down dip. The down-dropped block is called the hanging wall and the uplifted block is called the footwall.
Geothermal Glossary
Word of the Week – Well Casing
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 internal bore, and prevent the inflow of water and/or collapse of the hole.
Word of the Week – Wellhead
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 support and attach the anchor casing via a welded connection. Other flow valves...
Word of the Week – Well Logging
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, fracture orientation, porosity, rock type, casing integrity, and fluid...