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Petroleum Geology Acronyms


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Delta-T Shear, Receiver Array - Upper Dipole (DT2R)

This is an abbreviation for a well log acquired after or during drilling. The acronym DT2R is a unique identifier to recognize this particular log and can be encountered in your log evaluation software or your corporate datastores. Delta-T Shear, Receiver Array - Upper Dipole is the offical name for this log. This log is not used too often in the industry.

Use this log to investigate the acoustic slowness of a shear wave (Vs); reciprocal of Shear Velocity; a shear wave is a type of seismic wave in which the particle motion is perpendicular to the direction of propagation; also called S-wave or secondary wave.

In general this log thus reflects units 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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