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Diffraction analysis for the Sortym Formation using vertical seismic profiling data

ALEXER KLOKOV1 ,  DAMIR IRKABAEV2 ,  OSARENJ OGIESOBA1 ,  KONSTANTIN SKACHEK3 ,  NAIL MUNASYPOV4
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1 Bureau of Economic Geology, The University of Texas at Austin, University Station, Box X, Austin, TX 78713-8924, U.S.A.,
2 SPC Geotra, 3 Luganskaya St., Ufa, Republic of Bashkortostan, 450071 Russia.,
3 LUKOIL - West Siberia, 20 Pribaltyskaya St., Kogalym, Khanty-Mansi Autonomous District - Yugra, Tyumen region, 628486 Russia.,
4 Bashneftegeofizika, 13 Lenina St., Ufa, Republic of Bashkortostan, 450000 Russia.,
JSE 2014, 23(5), 463–480;
Submitted: 18 July 2014 | Accepted: 21 September 2014 | Published: 1 November 2014
© 2014 by the Authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
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Abstract

Klokov, A., Irkabaev, D., Ogiesoba, O., Skachek, K. and Munasypov, N., 2014. Diffraction analysis for the Sortym Formation using vertical seismic profiling data. Journal of Seismic Exploration, 23: 463-480. Seismic diffraction analysis may be a strong supplement for interpretation workflows. It allows characterization of small geologic features, which may not be detectable by conventional attribute analysis. Diffractions can play a significant role in fracture detection and characterization. In this work, we extract seismic diffractions from vertical seismic profiling (VSP) data acquired within the Sortym Formation in West Siberia. Seismic images of scattering objects were constructed for three components of the wavefield. We interpret the multicomponent diffraction images, comparing them with instantaneous frequency and instantaneous amplitude derived from conventional migrated data. The diffraction analysis allowed us to refine composition of the strata, to detect fracture clusters, and to predict the cluster orientation.

Keywords
diffraction imaging
borehole geophysics
VSP
multicomponent
shear waves
interpretation
fracture
shale
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Journal of Seismic Exploration, Print ISSN: 0963-0651, Published by AccScience Publishing
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