VO ANALYSES AND SPECTRAL DECOMPOSITION OF SEISMIC DATA, OFFSHORE NILE DELTA, EGYPT | ||
| Journal of Egyptian Geophysical Society | ||
| Volume 12, Issue 1, 2014, Pages 123-132 PDF (2.46 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jegs.2014.385018 | ||
| Authors | ||
| S.E. Mahmoud1; K.S. Ahmed1; M. Radwan2 | ||
| 1(1) Geophysics Department, Faculty of Science, Cairo University, Giza, Egypt. | ||
| 2(2) BG Egypt. | ||
| Abstract | ||
| This paper principally focuses on the analysis of two Pliocene wells located in the eastern part of the West Delta Deep Marine concession, Offshore Nile Deltato demonstrates that the appropriate use of AVO analysis forms a worthwhile and valuable tool for exploration. These wells encountered low gas saturation reservoirs and this study indicates that they are different in both the AVO behavior and their spectral characteristics. One of the primary aims of performing AVO analysis is to provide an improved understanding of AVO classifications of the encountered reservoirs, and the way to differentiate fluid effects from lithology in the Pliocene strata. For this study, there is a special focus on the examination of the offset stack data and the AVO cross plot analysis. For well (B), Class III AVO anomaly is consistent with theoretical predictions for frequency-dependent AVO behaviors. Results from the spectral analysis of well(A)show rather complicated behavior in the iso-frequency sections that cannot be fully explained. Generally, the amplitude anomalies for both wells were originally interpreted to be quite similar but this study indicates they are different in both the AVO behavior and their spectral characteristics. Spectral decomposition is applied to full stack seismic data covers these wells and provides further evidence for some differences in the spectral behavior of the reservoirs at both wells. | ||
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