Borehole Seismic Techniques

From Open Energy Information

Exploration Technique: Borehole Seismic Techniques

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Exploration Technique Information
Exploration Group: Downhole Techniques
Exploration Sub Group: Borehole Seismic Techniques
Parent Exploration Technique: Downhole Techniques
Information Provided by Technique
Lithology: Rock unit density influences elastic wave velocities
Stratigraphic/Structural: Structural geology- faults, folds, grabens, horst blocks, sedimentary layering, discontinuities, etc
Hydrological: Combining compressional and shear wave results can indicate the presence of fluid saturation in the formation
Thermal: High temperatures and pressure impact the compressional and shear wave velocities
Dictionary.png
Borehole Seismic Techniques:
Borehole seismic techniques provide high-resolution images in the vicinity of a wellbore and can be used for correlation with surface seismic data in order to improve the understanding of the subsurface.
Other definitions:Wikipedia Reegle


 
Introduction
  • "Borehole Seismic Techniques are any seismic technique where either the source or receivers are lowered down a borehole. Downhole seismic surveys can be carried out in boreholes that are open or cased, and usually take place once drilling operations are completed. The main benefits of borehole seismology compared to surface seismology are higher resolution, enhanced velocity model around a well, no depth uncertainties, and less near-surface distortions.'"`UNIQ--ref-00000000-QINU`"'" cannot be used as a page name in this wiki.
  • The given value was not understood.
Borehole Seismic Techniques are any seismic technique where either the source or receivers are lowered down a borehole. Downhole seismic surveys can be carried out in boreholes that are open or cased, and usually take place once drilling operations are completed. The main benefits of borehole seismology compared to surface seismology are higher resolution, enhanced velocity model around a well, no depth uncertainties, and less near-surface distortions.[1]
 
Related Techniques
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  • Borehole Seismic Techniques

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    Physical Properties

     
    Best Practices
    The given value was not understood.
    For successful borehole seismic surveys it is important to establish the orientation of down hole geophones because they can rotate as they travel down the borehole. Once they are in position the orientation can be determined by an offset surface orientation shot. It is also very important that the geophones have a good coupling with the borehole wall.[1]
     
    Potential Pitfalls
    The given value was not understood.
    Borehole seismic techniques can be more expensive compared to surface seismic techniques because more robust equipment is needed to handle the higher pressures, temperatures and fluids encountered downhole.[1]



     
    References
    1. 1.0 1.1 1.2 William Wills. Hostile wells: the borehole seismic challenge [Internet]. 2013. Oil and Gas Engineer - Subsea & Seismic. [cited 2013/10/01]. Available from: http://www.engineerlive.com/content/22907


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        <metadesc> About Borehole Seismic Techniques, a geothermal exploration technique, including areas of use. </metadesc>