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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EAGE 2020 ONLINE Conference & Exibition

La Sezione Italiana EAGE-SEG è lieta di dare ai suoi membri la possibilità di ottenere uno sconto sui costi di iscrizione per la EAGE 2020 ONLINE Conference & Exibition.

Lo sconto viene applicato automaticamente utilizzando il pulsante qui in basso. NB: Lo sconto non si applica alle iscrizioni studentesche.

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Webinar: Microseismic Monitoring: What I have learned in the last four years

In 2016, Peter Duncan presented a two-day overview of microseismic monitoring as he understood it at that time. Over the last four years the application of microseismic data, particularly to the development of unconventional resources through hydraulic fracturing, has made great strides particularly through integration with other reservoir geology and engineering practices. In this course, Duncan will try to bring you up to date on what has been accomplished using case histories of recent projects.

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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