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Petroleum Geology Acronyms

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ARC Resistivity Time After Bit (ARTM)

This is an abbreviation for a well log acquired after or during drilling. The code ARTM is a unique identifier to recognize this particular log and can be found in any (ASCII) log files provided by the logging company. The acronym stands for 'ARC Resistivity Time After Bit'. This log is very common in the industry.

The values of this log represent the time delay between the drill bit and a resistivity sensor reaching a given point in the wellbore during MWD/LWD logging. In general this is a measurement of the delay time. This is a measure of the time difference by which one event lags another. In refraction seismic work, the additional time required to traverse a raypath over the time which would be required to traverse the horizontal component at the highest velocity encountered on the raypath.

This log usually has the unit 'Time'. This is the 1) The measured or measurable period during which an action, process, or condition exists or continues. 2) The point or period when something occurs. 3) A fixed moment or hour for something to happen, begin, or end. 4) A historical period.

Data from this log can be used to investigate the time interval of the formation. Similar logs are listed below:

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