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  2. Wattenberg Gas Field - Wikipedia

    en.wikipedia.org/wiki/Wattenberg_Gas_Field

    Drilling in the Wattenberg Gas Field north of Denver, 2005. Although numerous wells had drilled through the Wattenberg Field over the decades, and many drillers and wellsite geologists noticed gas “shows” (indications) in the "J" Sandstone and other strata, the "J" Sandstone and other gas-bearing formations had permeability too low to yield gas in commercial quantities.

  3. Well logging - Wikipedia

    en.wikipedia.org/wiki/Well_logging

    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).

  4. Logging - Wikipedia

    en.wikipedia.org/wiki/Logging

    A Eucalyptus being felled using springboards, c. 1884–1917, Australia McGiffert Log Loader in East Texas, US, c. 1907 Lumber under snow in Montgomery, Colorado, 1880s. Logging is the process of cutting, processing, and moving trees to a location for transport.

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  6. Mud logging - Wikipedia

    en.wikipedia.org/wiki/Mud_logging

    Mud logging is usually performed by a third-party mud logging company. This provides well owners and producers with information about the lithology and fluid content of the borehole while drilling. Historically it is the earliest type of well log. Under some circumstances compressed air is employed as a circulating fluid, rather than mud.

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  8. Caliper log - Wikipedia

    en.wikipedia.org/wiki/Caliper_log

    A caliper log is a well logging tool that provides a continuous measurement of the size and shape of a borehole along its depth [1] and is commonly used in hydrocarbon exploration. The measurements that are recorded can be an important indicator of wash-outs, cave ins or shale swelling in the borehole, which can affect the results of other well ...

  9. Salvage logging - Wikipedia

    en.wikipedia.org/wiki/Salvage_logging

    Salvage logging is the practice of logging trees in forest areas that have been damaged by wildfire, flood, severe wind, disease, insect infestation, or other natural disturbance in order to recover economic value that would otherwise be lost.