Case Study 85,987-m Tractor Conveyance Record in Extended-Reach Well
TuffTRAC tractor makes 19 descents over 38 days, offshore Newfoundland.
DSI
Dipole shear sonic imager
Acquire acoustic data to improve your geomechanical modeling
The DSI dipole shear sonic imager combines monopole and dipole sonic acquisition capabilities for the reliable acoustic measurement of compressional, shear, and Stoneley slownesses.
The transmitter section contains a piezoelectric monopole transmitter and two electrodynamic dipole transmitters perpendicular to each other. An electric pulse at sonic frequencies is applied to the monopole transmitter to excite compressional- and shear-wave propagation in the formation. For Stoneley wave acquisition a specific low-frequency pulse is used. The dipole transmitters are also driven at low frequency to excite the flexural wave around the borehole.
Anisotropy evaluation
Both cross receivers (BCR) records inline and perpendicular waveforms for each dipole mode.
Extended slowness
The slowness measurement is extended to 1,200 ms/ft to extract a signal in unconsolidated formations.
Behind casing
Slowness is measured behind casing as part of ABC analysis behind casing services.
Interpretation
We work with you to apply advanced interpretation techniques and workflows to the combined monopole and dipole acquisition by the DSI dipole shear sonic imager.
Advanced sonic waveform processing and analysis provide critical information for completion optimization, sanding prediction, wellbore stability studies, and mechanical earth models. Shear wave splitting and orientation of the fast shear azimuth guide lateral well placement, and Stoneley analysis can indicate and characterize fractures as well as reveal formation mobility.
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