Scale Refers to deposition of minerals (e.g., calcite, silica, anhydrite, clays) in the well and reservoir that reduce permeability and block fluid channels.

Seismometer An instrument that records ground movement most often caused by earthquakes, volcanic eruptions and quarry or mine blasts. Short period seismometers detect seismic events that...

Shear Fracture A pre-existing joint or fracture that accommodates shear displacement due to frictional slippage, wherein the rough surfaces on the fracture surface create permeability due...