Cross-Dipole Acoustic Log
From Open Energy Information
Exploration Technique: Cross-Dipole Acoustic Log
|Exploration Technique Information|
|Exploration Group:||Downhole Techniques|
|Exploration Sub Group:||Well Log Techniques|
|Parent Exploration Technique:||Acoustic Logs|
|Information Provided by Technique|
|Hydrological:||Use for fracture identification in open and cased holes. Also used for for evaluating hydro fracturing/well stimulation effectiveness.|
"The WaveSonic® crossed-dipole sonic tool properly defines sonic attributes that can improve 3-D seismic analysis. The WaveSonic tool measures fast and slow shear wave travel times, P-wave slowness, compressive fluids in pore space, and anisotropy orientation. The tool even calculates minimum and maximum principal stresses and stress field orientation.
The WaveSonic tool's diagnostic plots of waveform data can lead to better geo-mechanical analysis, improved wellbore stability, and more effective designs for production enhancements. And because the tool's isolator design allows for drillpipe-conveyed operations, the WaveSonic log is not limited to the bottom of the tool string."
"The acquired logging data can be used to calculate plenty of petrophysical parameters and rock mechanical parameters for variety of usages in different phases in oil exploratioand production. Such as lithology identification, natural fracture identification, porosity calculation, formation fluid differentiation for formation evaluation; borehole stability analyses, formation fracturing pressure prediction, the minimum and maximum principal in-situ stress calculation and stress orientation estimation for drilling/completion/fracturing/oil production etc.
Cross-dipole array sonic log can work in both water based and oil-based mud system. This multi-purpose tool is useful in both open hole and cased hole. Field practice indicates the effectiveness of this tool in induced-fracture identification and fracture height estimation after stimulation."
|Page||Area||Activity Start Date||Activity End Date||Reference Material|
|Cross-Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010)||Alum Geothermal Area|