Bulletin du Service Géologique de l'Algérie
Volume 14, Numéro 1, Pages 37-51
2003-01-01
Contribution Of Seismic Attributes In The Direct Detection Of Hydrocarbon, Case History Of A Permit In The South Algerian Sahara
Authors : Djeddi Mabrouk . Ferrahtia Jalel . Djeddi Mounir . Aitouche Moh-amokrane .
Abstract
The zone of interest is located in an important oil and gas zone; its position near Berkine and Illizi basin makes it very important.Our study is based on the data collected on two seismic lines, according to the lines A and B, which intersect on well-2. The present work is based on the study of the contribution of the seismic attributes, in particular the amplitude attribute presented by the AVO method, to the direct hydrocarbons detection. The use of the seismic attributes and above all the AVO method becomes very widespread those latest years. With this study we wanted to show the sturdiness and the supply the additional information that can bring those attributes. We checked, in spite of the very poor quality of the data and the high noise level, that having recours to attributes such as amplitude, frequency and phase yields an invaluable information concerning the nature of the fluid, the continuity of the reflectors, the localisation of the discontinuities etc... ; many anomalies were localised in diverse places along the two profiles ; those anomalies may be used like a mark during the future studies on the region. (Note: due to the confidentiality of the data, authors have kept seismic lines and wells anonymous).
Keywords
AVO - DHI - Hilbert transform - Instantaneous frequency - Instantaneous phaseINVEST - Seismic attributes
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