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Petroleum Geology Acronyms


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Stoneley wave slowness (DTST)

This is a log of measurements along a well bore (a well-log). You could find this abbreviation DTST in your log evaluation software or any (ASCII) log files provided by the logging company. Stoneley wave slowness is the offical name for this log. This log is often used in the industry.

The values of this log represent the acoustic slowness of a Stoneley wave; a Stoneley wave is a type of seismic wave which is propagated along an interface, such as a tube wave in a borehole. In general this is a measurement of the interval transit time (The travel time of a wave over a unit distance, hence the reciprocal of wave velocity).

This log usually has the unit 'Acoustic Slowness'. This is the time interval per unit length, Delta-T, necessary to attenuate a traveling acoustic wave. Applies to all types of Delta-T: Compressional, Shear and Stoneley.

Data for this log is produced by a tool that uses a acoustic logging technique and can be used to investigate the acoustic slowness of the formation. Similar logs are listed below:




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