Angus, DAC, Aljaafari, A, Usher, P et al. (1 more author) (2014) Microseismic waveforms and velocity heterogeneity: Towards full-waveform location algorithm. In: 2014 SPE/EAGE European Unconventional Resources Conference and Exhibition. European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential, 25-27 Feb 2014, Vienna, Austria. Society of Petroleum Engineers , 408 - 414. ISBN 978-1-61399-294-4
Abstract
Seismic forward modeling is an integral component of microseismic location algorithms, yet there is generally no one correct approach, but rather a range of acceptable approaches that can be used. Since microseismic signals are band limited, the length scale of heterogeneities can significantly influence the seismic wavefronts and waveforms. This can be especially important when subsurface heterogeneity is strong and/or vary on scales lengths equivalent of less than the dominant source wavelength. In this paper, we show that ray-based approaches are not ubiquitously suitable for all microseismic applications and hence we argue that for advanced imaging techniques in unconventional reservoir settings, ray-based algorithms may not be suitably accurate. Here we focus on exploring the feasibility of using one-way wave equations as forward propagators for full waveform event location techniques. One-way wave equations are capable of modeling the evolution of important and observable wave phenomena and could represent efficient full waveform modeling tools. As a feasibility study, we focus on the acoustic wave equation to explore efficiencies and compare traveltime and amplitude errors. However, the results have implications for one-way wave equations for elastic and anisotropic media.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2014 SPE. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Nov 2014 12:49 |
Last Modified: | 19 Dec 2022 13:28 |
Published Version: | http://dx.doi.org/10.2118/167728-MS |
Status: | Published |
Publisher: | Society of Petroleum Engineers |
Identification Number: | 10.2118/167728-MS |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:81225 |