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Time-lapse Imaging for a Strongly Scattering Overburden via Joint-migration Inversion
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 77th EAGE Conference and Exhibition 2015, Jun 2015, Volume 2015, p.1 - 5
Abstract
Currently, assessing detailed time-lapse difference below a strongly scattering overburden is a major challenge: multiples and transmission effects from the overburden overwhelm the time-lapse signal. By employing an inversion-based velocity estimation and imaging process, such as via joint migration inversion (JMI), reliable estimates of the changes in the reservoir are expected to be obtained. The main reason for this accuracy is the use of multiples – also internal multiples - in the imaging process embedded in JMI. In this paper, based on a synthetic example, it is demonstrated that the JIM method is able to retrieve accurate time-lapse information from a situation where primaries-only methods do not provide an acceptable solution.