Many Iranian rig-source VSP datasets are recorded with the multilevel versatile seismic imager (VSI) VSP tool. Each shuttle of the VSI toolstring contains a Relative Bearing (RB) sensor measuring the roll angle made by the VSP tool arm with the vertical plane locally tangent to the deviated borehole trajectory. The 3C VSP data actually look correctly oriented using the roll angle provided by the RB sensor where the hole vertical inclination is over 8°. The whole orientation into geographical system was done using the hole inclination and azimuth angles provided by the borehole survey recorded during the wireline logging operations. A method was designed at the preprocessing stage to orientate the VSP data recorded below the 8° hole inclination threshold, by finding the RB angle differences level to level so as to render the downgoing Shear VSP wavetrain coherent on adjacent VSP stations. This was followed by calibrating the true RB angle on the VSP levels located in the hole intervals with inclination over 8°, whether the hole is cased or not. The present paper focuses on the principles of this orientation method, successfully tested on a couple of 3 component onshore VSP datasets made available by NIOC.


Article metrics loading...

Loading full text...

Full text loading...


  1. Kazemi, K.
    PhD-Thesis [2009] Seismic imaging of thrust fault structures in Zagros Iranian oil fields, from surface and well data; http://biblioweb.u-cergy.fr/theses/2009CERG0401.pdf
    [Google Scholar]
  2. Naville, C., Serbutoviez, S., Lecomte, JC., Froidevaux, P. et Kazemi, K.
    [2009] Brevet FR2942547. Méthode d’orientation de signaux sismiques de puits à trois composantes.
    [Google Scholar]
  3. Naville, C., Tavernetti, R., Sweeney, M., and Kazemi, K.
    [2015] Orientation of 3C rig-source VSP (poster). http://www.ifpenergiesnouvelles.fr/Competences/Directions-de-recherche/Geosciences/IFPEN-APS-PPZG-Orientation-of-3-component-Rig-source-VSPs
    [Google Scholar]
  4. Naville, C., Serbutoviez, S., Nicoletis, S., Nicou, C.
    [2017] VSP tool orientation using Magnetometer and Inclinometer sensors, 79th EAGE Conference & Exhibition, Paris, France, poster# We P9 05.
    [Google Scholar]
  5. Kazemi, K., Abdollahie Fard, I., NavilleC.
    [2017] Deep structural exploration in Zagros, SW Iran, using oriented 3-component VSP and resistivity borehole wall imager, 79th EAGE Conference & Exhibition, Paris, France, oral paper # Th A3 11.
    [Google Scholar]

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error