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Complex of EMS, Electrical Logging and Up-hole Velocity Survey Methods Application for Near-surface Exploration to Predict Optimal Charge Depth During Common Depth Point CDP Surveys
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Engineering and Mining Geophysics 2018, Apr 2018, Volume 2018, p.1 - 9
Abstract
Summary
To choose the optimal conditions for the explosion (the depth of the charge and its size) during the seismic SDP exploration works it was proposed to apply a set of methods of electrical logging + up-hole velocity survey + electromagnetic scanning.
This complex has been tested in various regions of the Russian Federation (Western Siberia, Evenkiya, and the North of the European part) and has confirmed its effectiveness in the various structures of the near-surface. Test explosions in alternative wells of CDP have shown the reliability of the forecast by the proposed complex no worse than 90%.
The application of this set of methods is aimed not only at improving the quality of field seismic data, but also allows reducing costs for up-hole velocity survey by 10–20 times and assuming the use of obtained materials for the introduction of statistical corrections in the processing of CDP.
Considering the incomparably higher informative and unambiguous results of new studies compared with the traditionally used techniques, the electrical logging + up-hole velocity survey + electromagnetic scanning complex should be recommended for inclusion in standard field seismic operations of CDP with an exploder source.
© EAGE Publications BV