EAGE E-Lecture: Seismic Anisotropy in Shaly Formations (Revisited by Patrick N.J Rasolofosaon)

 

Pubblicato il 21 gen 2016

https://www.youtube.com/watch?v=JjC-JZVy-zs&feature=youtu.be

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Eni Seismic Reservoir Characterisation Team – Massimo Fervari

The Italian EAGE-SEG Sectioninterviewed Massimo Fervari about the current applications and future perspectives onSeismic Inversion techniques, a technical topic with enormous implicationson the E&P activities of Energy Companies.Seismic Inversion has several applications and Massimo’s brain is certainly among the most passionate ones to pick.

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Assegnazione Sponsorhip Studentesca per 82a EAGE Conference & Exhibition

La Sezione Italiana EAGE-SEG ha offerto anche quest’anno la registrazione gratuita ed un rimborso spese forfettario pari a 300 euro a studenti di Università Italiane, per poter partecipare alla EAGE Conference & Exhibition, che si svolgerà a Amsterdam dall’ 8 all’ 11 dicembre 2020.

Dopo l’esame delle domande ricevute, è stata selezionata la studentessa Alessandra Lanzoni, dell’ Università di Trieste.

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Seismic anisotropy, that is to say the directional dependence of seismic velocity, is quite common in sedimentary formations and is often linked to the presence of shale. If not correctly taken into account it can strongly affect surface seismic data interpretation, seismic to well tie and azimuth versus offset analysis. From the analysis of two large databases of up to 800 ‘shaly’ samples in a broad sense, including shales but also mudshale, clayshale, siltstone, argillite, claystone, siltshale, mudstone, we demonstrate that seismic anisotropy in such formations is to a large extent determined by factors other than compaction processes, such as depositional environment, chemical composition of fluid, silt fraction, etc. Furthermore, the alignment of the individual clay platelets, main constituents of shales, can explain most of the anisotropy measurements of the databases. Assuming the elastic properties of the individual clay platelets, we propose simple plots for straightforwardly quantifying the Legendre Orientation Distribution Function coefficients and of the clay platelet alignment from the measurement of seismic anisotropy parameters. This video is part of EAGE Online Education Programme. The European Association of Geoscientists and Engineers (EAGE) is a global professional, non-profit association for geoscientists and engineers. EAGE strives to promote innovation and technical progress and aims to foster communication and cooperation between those working in, studying or interested in these fields. To learn more about EAGE Education visit www.LearningGeoscience.org