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Microseismicity
Tiny earthquakes that result from slip or shear along a fracture caused by an uneven distribution of stress. The displacements are very small scale and unfelt at the surface. They can only be detected with sensitive equipment such as geophones and accelerometers, which can be deployed on the surface or in boreholes.
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...