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Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole.The log may be based either on visual inspection of samples brought to the surface (geological logs) or on physical measurements made by instruments lowered into the hole (geophysical logs).
Well clusters consist of a closely spaced group of monitoring wells, each well completed to a different depth in individual boreholes. [1] Well clusters were first used in the 1950s at contaminated sites. [3] Because there is only one well screen in each borehole, there is little risk of vertical connection between zones. [3]
A drilling rig is used to create a borehole or well (also called a wellbore) in the earth's sub-surface, for example in order to extract natural resources such as gas or oil. During such drilling, data is acquired from the drilling rig sensors for a range of purposes such as: decision-support to monitor and manage the smooth operation of ...
Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA).. Although the terms Measurement while drilling (MWD) and LWD are related, within the context of this section, the term MWD refers to directional-drilling measurements, e.g., for decision support for the smooth operation of the drilling, while ...
Minerals and mining: Viridien supports mineral exploration through global geological predictions and plate kinematic studies, satellite-derived surface material alteration targeting, provision of geophysical equipment, and the development and provision of modeling software, as well as monitoring services for mining operations and mine tailing ...
Free to use software to digitize geological cross-sections, and display and edit borehole logs Geoscience ANALYST [ 30 ] Free 3D visualization and communication software for integrated, multi-disciplinary geoscience and mining data and models, which also connects to Python through geoh5py, its open-source API
Resistivity logging is used in mineral exploration (for example for exploration for iron and copper ore bodies), geological exploration (deep geological disposal, geothermal wells), and water-well drilling. It is an indispensable tool for formation evaluation in oil- and gas-well drilling.
Well logging operations can either be performed during the drilling process (see Logging While Drilling), to provide real-time information about the formations being penetrated by the borehole, or once the well has reached Total Depth and the whole depth of the borehole can be logged. Real-time data is recorded directly against measured cable ...