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Is there value in 4D Elastic Inversion?
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 82nd EAGE Annual Conference & Exhibition, Oct 2021, Volume 2021, p.1 - 5
Abstract
Summary
4D AVO remains a rarely-used tool. Why is that? Conventional wisdom is that the majority of 4D effects occurring in the reservoir are already detectable and interpretable using acoustic amplitude differences and/or time shift information. We present 2 ways that we can access pre-stack 4D information: one very simple method, that helps us determine if application of a full elastic 4D inversion workflow is a worthwhile exercise; and an elastic extension to joint 4D seismic inversion. A real data example illustrates the potential added value of such an approach, where we separate changes in pressure and saturation effects at a water injection well.
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