Characterization of the spatiotemporal variation of seismic attenuation during hydraulic fracturing of a shale block

I. Vera Rodriguez, S. Stanchits

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

By representing the seismic quality factor (Q) as a random variable, we use spectral ratios of acoustic emission (AE) signals to approximate its probability distribution. This representation is used to characterize the heterogeneous and anisotropic attenuation response of a shale block subjected to hydraulic fracturing. Attenuation at the start of the experiment correlates with the imposed principal stresses, with higher stress corresponding with less attenuation. During the fracturing, changes in attenuation correlate with the borehole pressure, which supports the notion that the changes captured by the AE signals are mainly related to perturbations to the stress field. The results are also compatible with previous observations in a sandstone block fractured under similar experimental conditions.

Original languageEnglish
Title of host publication80th EAGE Conference and Exhibition 2018
Subtitle of host publicationOpportunities Presented by the Energy Transition
PublisherEuropean Association of Geoscientists and Engineers, EAGE
ISBN (Electronic)9789462822542
Publication statusPublished - 2018
Externally publishedYes
Event80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition - Copenhagen, Denmark
Duration: 11 Jun 201814 Jun 2018

Publication series

Name80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition

Conference

Conference80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition
Country/TerritoryDenmark
CityCopenhagen
Period11/06/1814/06/18

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