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  2. Log ASCII standard - Wikipedia

    en.wikipedia.org/wiki/Log_ASCII_Standard

    Log ASCII standard (LAS) is a standard file format common in the oil-and-gas and water well industries to store well log information. Well logging is used to investigate and characterize the subsurface stratigraphy in a well. A single LAS file can only contain data for one well, but it can contain any number datasets (called "curves") from that ...

  3. 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 ...

  4. Oregon Department of Geology and Mineral Industries

    en.wikipedia.org/wiki/Oregon_Department_of...

    To obtain a permit to drill an oil or gas well, the following items must be submitted to the Department of Geology's Mineral Land Regulation & Reclamation office: A completed application form. Application fee (see Oil & Gas Fee Schedule). A drilling bond (amount based on depth of well). Evidence of mineral rights ownership or lease.

  5. 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).

  6. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    SPUD – spud date (started drilling well) SPWLA – Society of Petrophysicists and Well Log Analysts [29] SQL – seismic quicklook log; SQZ – squeeze job; SR – shear rate; SRD – seismic reference datum, an imaginary horizontal surface at which TWT [clarification needed] is assumed to be zero [citation needed] SREC – seismic record log

  7. List of free geology software - Wikipedia

    en.wikipedia.org/wiki/List_of_free_geology_software

    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 Mira Geoscience Ltd. Free / Proprietary

  8. Measurement while drilling - Wikipedia

    en.wikipedia.org/wiki/Measurement_while_drilling

    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 ...

  9. Formation evaluation - Wikipedia

    en.wikipedia.org/wiki/Formation_evaluation

    The written strip chart recording of these examinations is called a sample log or mudlog. Well cuttings examination is a learned skill. During drilling, chips of rock, usually less than about 1 ⁄ 8 inch (3.2 mm) across, are cut from the bottom of the hole by the bit. Mud, jetting out of holes in the bit under high pressure, washes the ...

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