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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).
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.
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 ...
Sep. 11—AUSTIN — The Railroad Commission of Texas issued a total of 820 original drilling permits in August 2023, according to a press release. ... The breakdown of well types for total ...
Oct. 11—The Railroad Commission of Texas issued a total of 626 original drilling permits in September 2024. The total includes 580 to drill new oil or gas wells, 6 to re-enter plugged wellbores ...
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 ...
The breakdown of well types for total original drilling permits in June 2024 is: 138 oil, 34 gas, 505 oil and gas, 26 injection, and 12 other permits. ... Texas drilling permit and completion ...
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 ...